Merge branch 'master' into index-lifecycle

client/rest-high-level/src/main/java/org/elasticsearch/client/ClusterClient.java

@@ -21,6 +21,8 @@ package org.elasticsearch.client;
 
 import org.apache.http.Header;
 import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksRequest;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksResponse;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsResponse;
 
@@ -63,4 +65,26 @@ public final class ClusterClient {
         restHighLevelClient.performRequestAsyncAndParseEntity(clusterUpdateSettingsRequest, RequestConverters::clusterPutSettings,
                 ClusterUpdateSettingsResponse::fromXContent, listener, emptySet(), headers);
     }
+
+    /**
+     * Get current tasks using the Task Management API
+     * <p>
+     * See
+     * <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/tasks.html"> Task Management API on elastic.co</a>
+     */
+    public ListTasksResponse listTasks(ListTasksRequest request, Header... headers) throws IOException {
+        return restHighLevelClient.performRequestAndParseEntity(request, RequestConverters::listTasks, ListTasksResponse::fromXContent,
+                emptySet(), headers);
+    }
+
+    /**
+     * Asynchronously get current tasks using the Task Management API
+     * <p>
+     * See
+     * <a href="https://www.elastic.co/guide/en/elasticsearch/reference/current/tasks.html"> Task Management API on elastic.co</a>
+     */
+    public void listTasksAsync(ListTasksRequest request, ActionListener<ListTasksResponse> listener, Header... headers) {
+        restHighLevelClient.performRequestAsyncAndParseEntity(request, RequestConverters::listTasks, ListTasksResponse::fromXContent,
+                listener, emptySet(), headers);
+    }
 }

client/rest-high-level/src/main/java/org/elasticsearch/client/RequestConverters.java

@@ -29,6 +29,7 @@ import org.apache.http.entity.ByteArrayEntity;
 import org.apache.http.entity.ContentType;
 import org.apache.lucene.util.BytesRef;
 import org.elasticsearch.action.DocWriteRequest;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksRequest;
 import org.elasticsearch.action.admin.cluster.repositories.get.GetRepositoriesRequest;
 import org.elasticsearch.action.admin.cluster.repositories.put.PutRepositoryRequest;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
@@ -45,8 +46,8 @@ import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;
 import org.elasticsearch.action.admin.indices.open.OpenIndexRequest;
 import org.elasticsearch.action.admin.indices.refresh.RefreshRequest;
 import org.elasticsearch.action.admin.indices.rollover.RolloverRequest;
-import org.elasticsearch.action.admin.indices.settings.put.UpdateSettingsRequest;
 import org.elasticsearch.action.admin.indices.settings.get.GetSettingsRequest;
+import org.elasticsearch.action.admin.indices.settings.put.UpdateSettingsRequest;
 import org.elasticsearch.action.admin.indices.shrink.ResizeRequest;
 import org.elasticsearch.action.admin.indices.shrink.ResizeType;
 import org.elasticsearch.action.admin.indices.template.put.PutIndexTemplateRequest;
@@ -83,6 +84,7 @@ import org.elasticsearch.index.rankeval.RankEvalRequest;
 import org.elasticsearch.rest.action.search.RestSearchAction;
 import org.elasticsearch.script.mustache.SearchTemplateRequest;
 import org.elasticsearch.search.fetch.subphase.FetchSourceContext;
+import org.elasticsearch.tasks.TaskId;
 
 import java.io.ByteArrayOutputStream;
 import java.io.IOException;
@@ -606,6 +608,22 @@ final class RequestConverters {
         return request;
     }
 
+    static Request listTasks(ListTasksRequest listTaskRequest) {
+        if (listTaskRequest.getTaskId() != null && listTaskRequest.getTaskId().isSet()) {
+            throw new IllegalArgumentException("TaskId cannot be used for list tasks request");
+        }
+        Request request  = new Request(HttpGet.METHOD_NAME, "/_tasks");
+        Params params = new Params(request);
+        params.withTimeout(listTaskRequest.getTimeout())
+            .withDetailed(listTaskRequest.getDetailed())
+            .withWaitForCompletion(listTaskRequest.getWaitForCompletion())
+            .withParentTaskId(listTaskRequest.getParentTaskId())
+            .withNodes(listTaskRequest.getNodes())
+            .withActions(listTaskRequest.getActions())
+            .putParam("group_by", "none");
+        return request;
+    }
+
     static Request rollover(RolloverRequest rolloverRequest) throws IOException {
         String endpoint = new EndpointBuilder().addPathPart(rolloverRequest.getAlias()).addPathPartAsIs("_rollover")
                 .addPathPart(rolloverRequest.getNewIndexName()).build();
@@ -932,6 +950,41 @@ final class RequestConverters {
             return this;
         }
 
+        Params withDetailed(boolean detailed) {
+            if (detailed) {
+                return putParam("detailed", Boolean.TRUE.toString());
+            }
+            return this;
+        }
+
+        Params withWaitForCompletion(boolean waitForCompletion) {
+            if (waitForCompletion) {
+                return putParam("wait_for_completion", Boolean.TRUE.toString());
+            }
+            return this;
+        }
+
+        Params withNodes(String[] nodes) {
+            if (nodes != null && nodes.length > 0) {
+                return putParam("nodes", String.join(",", nodes));
+            }
+            return this;
+        }
+
+        Params withActions(String[] actions) {
+            if (actions != null && actions.length > 0) {
+                return putParam("actions", String.join(",", actions));
+            }
+            return this;
+        }
+
+        Params withParentTaskId(TaskId parentTaskId) {
+            if (parentTaskId != null && parentTaskId.isSet()) {
+                return putParam("parent_task_id", parentTaskId.toString());
+            }
+            return this;
+        }
+
         Params withVerify(boolean verify) {
             if (verify) {
                 return putParam("verify", Boolean.TRUE.toString());

client/rest-high-level/src/test/java/org/elasticsearch/client/ClusterClientIT.java

@@ -20,6 +20,9 @@
 package org.elasticsearch.client;
 
 import org.elasticsearch.ElasticsearchException;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksRequest;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksResponse;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.TaskGroup;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsResponse;
 import org.elasticsearch.cluster.routing.allocation.decider.EnableAllocationDecider;
@@ -29,13 +32,16 @@ import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.common.xcontent.support.XContentMapValues;
 import org.elasticsearch.indices.recovery.RecoverySettings;
 import org.elasticsearch.rest.RestStatus;
+import org.elasticsearch.tasks.TaskInfo;
 
 import java.io.IOException;
 import java.util.HashMap;
 import java.util.Map;
 
+import static java.util.Collections.emptyList;
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
 import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
 import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;
 
@@ -105,4 +111,29 @@ public class ClusterClientIT extends ESRestHighLevelClientTestCase {
         assertThat(exception.getMessage(), equalTo(
                 "Elasticsearch exception [type=illegal_argument_exception, reason=transient setting [" + setting + "], not recognized]"));
     }
+
+    public void testListTasks() throws IOException {
+        ListTasksRequest request = new ListTasksRequest();
+        ListTasksResponse response = execute(request, highLevelClient().cluster()::listTasks, highLevelClient().cluster()::listTasksAsync);
+
+        assertThat(response, notNullValue());
+        assertThat(response.getNodeFailures(), equalTo(emptyList()));
+        assertThat(response.getTaskFailures(), equalTo(emptyList()));
+        // It's possible that there are other tasks except 'cluster:monitor/tasks/lists[n]' and 'action":"cluster:monitor/tasks/lists'
+        assertThat(response.getTasks().size(), greaterThanOrEqualTo(2));
+        boolean listTasksFound = false;
+        for (TaskGroup taskGroup : response.getTaskGroups()) {
+            TaskInfo parent = taskGroup.getTaskInfo();
+            if ("cluster:monitor/tasks/lists".equals(parent.getAction())) {
+                assertThat(taskGroup.getChildTasks().size(), equalTo(1));
+                TaskGroup childGroup = taskGroup.getChildTasks().iterator().next();
+                assertThat(childGroup.getChildTasks().isEmpty(), equalTo(true));
+                TaskInfo child = childGroup.getTaskInfo();
+                assertThat(child.getAction(), equalTo("cluster:monitor/tasks/lists[n]"));
+                assertThat(child.getParentTaskId(), equalTo(parent.getTaskId()));
+                listTasksFound = true;
+            }
+        }
+        assertTrue("List tasks were not found", listTasksFound);
+    }
 }

client/rest-high-level/src/test/java/org/elasticsearch/client/RequestConvertersTests.java

@@ -29,6 +29,7 @@ import org.apache.http.entity.ByteArrayEntity;
 import org.apache.http.util.EntityUtils;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.DocWriteRequest;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksRequest;
 import org.elasticsearch.action.admin.cluster.repositories.get.GetRepositoriesRequest;
 import org.elasticsearch.action.admin.cluster.repositories.put.PutRepositoryRequest;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
@@ -111,6 +112,7 @@ import org.elasticsearch.search.fetch.subphase.highlight.HighlightBuilder;
 import org.elasticsearch.search.rescore.QueryRescorerBuilder;
 import org.elasticsearch.search.suggest.SuggestBuilder;
 import org.elasticsearch.search.suggest.completion.CompletionSuggestionBuilder;
+import org.elasticsearch.tasks.TaskId;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.test.RandomObjects;
 
@@ -142,6 +144,7 @@ import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertToXC
 import static org.hamcrest.CoreMatchers.equalTo;
 import static org.hamcrest.Matchers.hasEntry;
 import static org.hamcrest.Matchers.hasKey;
+import static org.hamcrest.Matchers.notNullValue;
 import static org.hamcrest.Matchers.nullValue;
 
 public class RequestConvertersTests extends ESTestCase {
@@ -188,8 +191,7 @@ public class RequestConvertersTests extends ESTestCase {
 
         int numberOfRequests = randomIntBetween(0, 32);
         for (int i = 0; i < numberOfRequests; i++) {
-            MultiGetRequest.Item item =
-                    new MultiGetRequest.Item(randomAlphaOfLength(4), randomAlphaOfLength(4), randomAlphaOfLength(4));
+            MultiGetRequest.Item item = new MultiGetRequest.Item(randomAlphaOfLength(4), randomAlphaOfLength(4), randomAlphaOfLength(4));
             if (randomBoolean()) {
                 item.routing(randomAlphaOfLength(4));
             }
@@ -268,7 +270,7 @@ public class RequestConvertersTests extends ESTestCase {
 
     public void testIndicesExistEmptyIndices() {
         expectThrows(IllegalArgumentException.class, () -> RequestConverters.indicesExist(new GetIndexRequest()));
-        expectThrows(IllegalArgumentException.class, () -> RequestConverters.indicesExist(new GetIndexRequest().indices((String[])null)));
+        expectThrows(IllegalArgumentException.class, () -> RequestConverters.indicesExist(new GetIndexRequest().indices((String[]) null)));
     }
 
     private static void getAndExistsTest(Function<GetRequest, Request> requestConverter, String method) {
@@ -422,7 +424,8 @@ public class RequestConvertersTests extends ESTestCase {
         setRandomLocal(getSettingsRequest, expectedParams);
 
         if (randomBoolean()) {
-            //the request object will not have include_defaults present unless it is set to true
+            // the request object will not have include_defaults present unless it is set to
+            // true
             getSettingsRequest.includeDefaults(randomBoolean());
             if (getSettingsRequest.includeDefaults()) {
                 expectedParams.put("include_defaults", Boolean.toString(true));
@@ -966,22 +969,21 @@ public class RequestConvertersTests extends ESTestCase {
             bulkRequest.add(new IndexRequest("index", "type", "0").source(singletonMap("field", "value"), XContentType.SMILE));
             bulkRequest.add(new IndexRequest("index", "type", "1").source(singletonMap("field", "value"), XContentType.JSON));
             IllegalArgumentException exception = expectThrows(IllegalArgumentException.class, () -> RequestConverters.bulk(bulkRequest));
-            assertEquals("Mismatching content-type found for request with content-type [JSON], " +
-                            "previous requests have content-type [SMILE]", exception.getMessage());
+            assertEquals(
+                    "Mismatching content-type found for request with content-type [JSON], " + "previous requests have content-type [SMILE]",
+                    exception.getMessage());
         }
         {
             BulkRequest bulkRequest = new BulkRequest();
-            bulkRequest.add(new IndexRequest("index", "type", "0")
-                    .source(singletonMap("field", "value"), XContentType.JSON));
-            bulkRequest.add(new IndexRequest("index", "type", "1")
-                    .source(singletonMap("field", "value"), XContentType.JSON));
+            bulkRequest.add(new IndexRequest("index", "type", "0").source(singletonMap("field", "value"), XContentType.JSON));
+            bulkRequest.add(new IndexRequest("index", "type", "1").source(singletonMap("field", "value"), XContentType.JSON));
             bulkRequest.add(new UpdateRequest("index", "type", "2")
                     .doc(new IndexRequest().source(singletonMap("field", "value"), XContentType.JSON))
-                    .upsert(new IndexRequest().source(singletonMap("field", "value"), XContentType.SMILE))
-            );
+                    .upsert(new IndexRequest().source(singletonMap("field", "value"), XContentType.SMILE)));
             IllegalArgumentException exception = expectThrows(IllegalArgumentException.class, () -> RequestConverters.bulk(bulkRequest));
-            assertEquals("Mismatching content-type found for request with content-type [SMILE], " +
-                            "previous requests have content-type [JSON]", exception.getMessage());
+            assertEquals(
+                    "Mismatching content-type found for request with content-type [SMILE], " + "previous requests have content-type [JSON]",
+                    exception.getMessage());
         }
         {
             XContentType xContentType = randomFrom(XContentType.CBOR, XContentType.YAML);
@@ -1022,9 +1024,10 @@ public class RequestConvertersTests extends ESTestCase {
         setRandomIndicesOptions(searchRequest::indicesOptions, searchRequest::indicesOptions, expectedParams);
 
         SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
-        //rarely skip setting the search source completely
+        // rarely skip setting the search source completely
         if (frequently()) {
-            //frequently set the search source to have some content, otherwise leave it empty but still set it
+            // frequently set the search source to have some content, otherwise leave it
+            // empty but still set it
             if (frequently()) {
                 if (randomBoolean()) {
                     searchSourceBuilder.size(randomIntBetween(0, Integer.MAX_VALUE));
@@ -1094,7 +1097,8 @@ public class RequestConvertersTests extends ESTestCase {
         MultiSearchRequest multiSearchRequest = new MultiSearchRequest();
         for (int i = 0; i < numberOfSearchRequests; i++) {
             SearchRequest searchRequest = randomSearchRequest(() -> {
-                // No need to return a very complex SearchSourceBuilder here, that is tested elsewhere
+                // No need to return a very complex SearchSourceBuilder here, that is tested
+                // elsewhere
                 SearchSourceBuilder searchSourceBuilder = new SearchSourceBuilder();
                 searchSourceBuilder.from(randomInt(10));
                 searchSourceBuilder.size(randomIntBetween(20, 100));
@@ -1102,14 +1106,13 @@ public class RequestConvertersTests extends ESTestCase {
             });
             // scroll is not supported in the current msearch api, so unset it:
             searchRequest.scroll((Scroll) null);
-            // only expand_wildcards, ignore_unavailable and allow_no_indices can be specified from msearch api, so unset other options:
+            // only expand_wildcards, ignore_unavailable and allow_no_indices can be
+            // specified from msearch api, so unset other options:
             IndicesOptions randomlyGenerated = searchRequest.indicesOptions();
             IndicesOptions msearchDefault = new MultiSearchRequest().indicesOptions();
-            searchRequest.indicesOptions(IndicesOptions.fromOptions(
-                    randomlyGenerated.ignoreUnavailable(), randomlyGenerated.allowNoIndices(), randomlyGenerated.expandWildcardsOpen(),
-                    randomlyGenerated.expandWildcardsClosed(), msearchDefault.allowAliasesToMultipleIndices(),
-                    msearchDefault.forbidClosedIndices(), msearchDefault.ignoreAliases()
-            ));
+            searchRequest.indicesOptions(IndicesOptions.fromOptions(randomlyGenerated.ignoreUnavailable(),
+                    randomlyGenerated.allowNoIndices(), randomlyGenerated.expandWildcardsOpen(), randomlyGenerated.expandWildcardsClosed(),
+                    msearchDefault.allowAliasesToMultipleIndices(), msearchDefault.forbidClosedIndices(), msearchDefault.ignoreAliases()));
             multiSearchRequest.add(searchRequest);
         }
 
@@ -1134,8 +1137,8 @@ public class RequestConvertersTests extends ESTestCase {
             requests.add(searchRequest);
         };
         MultiSearchRequest.readMultiLineFormat(new BytesArray(EntityUtils.toByteArray(request.getEntity())),
-                REQUEST_BODY_CONTENT_TYPE.xContent(), consumer, null, multiSearchRequest.indicesOptions(), null, null,
-                null, xContentRegistry(), true);
+                REQUEST_BODY_CONTENT_TYPE.xContent(), consumer, null, multiSearchRequest.indicesOptions(), null, null, null,
+                xContentRegistry(), true);
         assertEquals(requests, multiSearchRequest.requests());
     }
 
@@ -1230,7 +1233,7 @@ public class RequestConvertersTests extends ESTestCase {
         GetAliasesRequest getAliasesRequest = new GetAliasesRequest();
         String[] indices = randomBoolean() ? null : randomIndicesNames(0, 5);
         getAliasesRequest.indices(indices);
-        //the HEAD endpoint requires at least an alias or an index
+        // the HEAD endpoint requires at least an alias or an index
         boolean hasIndices = indices != null && indices.length > 0;
         String[] aliases;
         if (hasIndices) {
@@ -1261,15 +1264,15 @@ public class RequestConvertersTests extends ESTestCase {
     public void testExistsAliasNoAliasNoIndex() {
         {
             GetAliasesRequest getAliasesRequest = new GetAliasesRequest();
-            IllegalArgumentException iae = expectThrows(IllegalArgumentException.class, () ->
-                    RequestConverters.existsAlias(getAliasesRequest));
+            IllegalArgumentException iae = expectThrows(IllegalArgumentException.class,
+                    () -> RequestConverters.existsAlias(getAliasesRequest));
             assertEquals("existsAlias requires at least an alias or an index", iae.getMessage());
         }
         {
-            GetAliasesRequest getAliasesRequest = new GetAliasesRequest((String[])null);
-            getAliasesRequest.indices((String[])null);
-            IllegalArgumentException iae = expectThrows(IllegalArgumentException.class, () ->
-                    RequestConverters.existsAlias(getAliasesRequest));
+            GetAliasesRequest getAliasesRequest = new GetAliasesRequest((String[]) null);
+            getAliasesRequest.indices((String[]) null);
+            IllegalArgumentException iae = expectThrows(IllegalArgumentException.class,
+                    () -> RequestConverters.existsAlias(getAliasesRequest));
             assertEquals("existsAlias requires at least an alias or an index", iae.getMessage());
         }
     }
@@ -1279,14 +1282,10 @@ public class RequestConvertersTests extends ESTestCase {
         String[] indices = randomIndicesNames(0, 5);
         String[] fields = generateRandomStringArray(5, 10, false, false);
 
-        FieldCapabilitiesRequest fieldCapabilitiesRequest = new FieldCapabilitiesRequest()
-            .indices(indices)
-            .fields(fields);
+        FieldCapabilitiesRequest fieldCapabilitiesRequest = new FieldCapabilitiesRequest().indices(indices).fields(fields);
 
         Map<String, String> indicesOptionsParams = new HashMap<>();
-        setRandomIndicesOptions(fieldCapabilitiesRequest::indicesOptions,
-            fieldCapabilitiesRequest::indicesOptions,
-            indicesOptionsParams);
+        setRandomIndicesOptions(fieldCapabilitiesRequest::indicesOptions, fieldCapabilitiesRequest::indicesOptions, indicesOptionsParams);
 
         Request request = RequestConverters.fieldCaps(fieldCapabilitiesRequest);
 
@@ -1301,12 +1300,13 @@ public class RequestConvertersTests extends ESTestCase {
         assertEquals(endpoint.toString(), request.getEndpoint());
         assertEquals(4, request.getParameters().size());
 
-        // Note that we don't check the field param value explicitly, as field names are passed through
-        // a hash set before being added to the request, and can appear in a non-deterministic order.
+        // Note that we don't check the field param value explicitly, as field names are
+        // passed through
+        // a hash set before being added to the request, and can appear in a
+        // non-deterministic order.
         assertThat(request.getParameters(), hasKey("fields"));
         String[] requestFields = Strings.splitStringByCommaToArray(request.getParameters().get("fields"));
-        assertEquals(new HashSet<>(Arrays.asList(fields)),
-            new HashSet<>(Arrays.asList(requestFields)));
+        assertEquals(new HashSet<>(Arrays.asList(fields)), new HashSet<>(Arrays.asList(requestFields)));
 
         for (Map.Entry<String, String> param : indicesOptionsParams.entrySet()) {
             assertThat(request.getParameters(), hasEntry(param.getKey(), param.getValue()));
@@ -1465,6 +1465,66 @@ public class RequestConvertersTests extends ESTestCase {
         assertEquals(expectedParams, request.getParameters());
     }
 
+    public void testListTasks() {
+        {
+            ListTasksRequest request = new ListTasksRequest();
+            Map<String, String> expectedParams = new HashMap<>();
+            if (randomBoolean()) {
+                request.setDetailed(randomBoolean());
+                if (request.getDetailed()) {
+                    expectedParams.put("detailed", "true");
+                }
+            }
+            if (randomBoolean()) {
+                request.setWaitForCompletion(randomBoolean());
+                if (request.getWaitForCompletion()) {
+                    expectedParams.put("wait_for_completion", "true");
+                }
+            }
+            if (randomBoolean()) {
+                String timeout = randomTimeValue();
+                request.setTimeout(timeout);
+                expectedParams.put("timeout", timeout);
+            }
+            if (randomBoolean()) {
+                if (randomBoolean()) {
+                    TaskId taskId = new TaskId(randomAlphaOfLength(5), randomNonNegativeLong());
+                    request.setParentTaskId(taskId);
+                    expectedParams.put("parent_task_id", taskId.toString());
+                } else {
+                    request.setParentTask(TaskId.EMPTY_TASK_ID);
+                }
+            }
+            if (randomBoolean()) {
+                String[] nodes = generateRandomStringArray(10, 8, false);
+                request.setNodes(nodes);
+                if (nodes.length > 0) {
+                    expectedParams.put("nodes", String.join(",", nodes));
+                }
+            }
+            if (randomBoolean()) {
+                String[] actions = generateRandomStringArray(10, 8, false);
+                request.setActions(actions);
+                if (actions.length > 0) {
+                    expectedParams.put("actions", String.join(",", actions));
+                }
+            }
+            expectedParams.put("group_by", "none");
+            Request httpRequest = RequestConverters.listTasks(request);
+            assertThat(httpRequest, notNullValue());
+            assertThat(httpRequest.getMethod(), equalTo(HttpGet.METHOD_NAME));
+            assertThat(httpRequest.getEntity(), nullValue());
+            assertThat(httpRequest.getEndpoint(), equalTo("/_tasks"));
+            assertThat(httpRequest.getParameters(), equalTo(expectedParams));
+        }
+        {
+            ListTasksRequest request = new ListTasksRequest();
+            request.setTaskId(new TaskId(randomAlphaOfLength(5), randomNonNegativeLong()));
+            IllegalArgumentException exception = expectThrows(IllegalArgumentException.class, () -> RequestConverters.listTasks(request));
+            assertEquals("TaskId cannot be used for list tasks request", exception.getMessage());
+        }
+    }
+
     public void testGetRepositories() {
         Map<String, String> expectedParams = new HashMap<>();
         StringBuilder endpoint = new StringBuilder("/_snapshot");
@@ -1474,7 +1534,7 @@ public class RequestConvertersTests extends ESTestCase {
         setRandomLocal(getRepositoriesRequest, expectedParams);
 
         if (randomBoolean()) {
-            String[] entries = new String[] {"a", "b", "c"};
+            String[] entries = new String[] { "a", "b", "c" };
             getRepositoriesRequest.repositories(entries);
             endpoint.append("/" + String.join(",", entries));
         }
@@ -1513,9 +1573,8 @@ public class RequestConvertersTests extends ESTestCase {
         names.put("-#template", "-%23template");
         names.put("foo^bar", "foo%5Ebar");
 
-        PutIndexTemplateRequest putTemplateRequest = new PutIndexTemplateRequest()
-            .name(randomFrom(names.keySet()))
-            .patterns(Arrays.asList(generateRandomStringArray(20, 100, false, false)));
+        PutIndexTemplateRequest putTemplateRequest = new PutIndexTemplateRequest().name(randomFrom(names.keySet()))
+                .patterns(Arrays.asList(generateRandomStringArray(20, 100, false, false)));
         if (randomBoolean()) {
             putTemplateRequest.order(randomInt());
         }
@@ -1572,14 +1631,12 @@ public class RequestConvertersTests extends ESTestCase {
             assertEquals("/a/b", endpointBuilder.build());
         }
         {
-            EndpointBuilder endpointBuilder = new EndpointBuilder().addPathPart("a").addPathPart("b")
-                    .addPathPartAsIs("_create");
+            EndpointBuilder endpointBuilder = new EndpointBuilder().addPathPart("a").addPathPart("b").addPathPartAsIs("_create");
             assertEquals("/a/b/_create", endpointBuilder.build());
         }
 
         {
-            EndpointBuilder endpointBuilder = new EndpointBuilder().addPathPart("a", "b", "c")
-                    .addPathPartAsIs("_create");
+            EndpointBuilder endpointBuilder = new EndpointBuilder().addPathPart("a", "b", "c").addPathPartAsIs("_create");
             assertEquals("/a/b/c/_create", endpointBuilder.build());
         }
         {
@@ -1638,13 +1695,12 @@ public class RequestConvertersTests extends ESTestCase {
             assertEquals("/foo%5Ebar", endpointBuilder.build());
         }
         {
-            EndpointBuilder endpointBuilder = new EndpointBuilder().addPathPart("cluster1:index1,index2")
-                    .addPathPartAsIs("_search");
+            EndpointBuilder endpointBuilder = new EndpointBuilder().addPathPart("cluster1:index1,index2").addPathPartAsIs("_search");
             assertEquals("/cluster1:index1,index2/_search", endpointBuilder.build());
         }
         {
-            EndpointBuilder endpointBuilder = new EndpointBuilder()
-                    .addCommaSeparatedPathParts(new String[]{"index1", "index2"}).addPathPartAsIs("cache/clear");
+            EndpointBuilder endpointBuilder = new EndpointBuilder().addCommaSeparatedPathParts(new String[] { "index1", "index2" })
+                    .addPathPartAsIs("cache/clear");
             assertEquals("/index1,index2/cache/clear", endpointBuilder.build());
         }
     }
@@ -1652,12 +1708,12 @@ public class RequestConvertersTests extends ESTestCase {
     public void testEndpoint() {
         assertEquals("/index/type/id", RequestConverters.endpoint("index", "type", "id"));
         assertEquals("/index/type/id/_endpoint", RequestConverters.endpoint("index", "type", "id", "_endpoint"));
-        assertEquals("/index1,index2", RequestConverters.endpoint(new String[]{"index1", "index2"}));
-        assertEquals("/index1,index2/_endpoint", RequestConverters.endpoint(new String[]{"index1", "index2"}, "_endpoint"));
-        assertEquals("/index1,index2/type1,type2/_endpoint", RequestConverters.endpoint(new String[]{"index1", "index2"},
-                new String[]{"type1", "type2"}, "_endpoint"));
-        assertEquals("/index1,index2/_endpoint/suffix1,suffix2", RequestConverters.endpoint(new String[]{"index1", "index2"},
-                "_endpoint", new String[]{"suffix1", "suffix2"}));
+        assertEquals("/index1,index2", RequestConverters.endpoint(new String[] { "index1", "index2" }));
+        assertEquals("/index1,index2/_endpoint", RequestConverters.endpoint(new String[] { "index1", "index2" }, "_endpoint"));
+        assertEquals("/index1,index2/type1,type2/_endpoint",
+                RequestConverters.endpoint(new String[] { "index1", "index2" }, new String[] { "type1", "type2" }, "_endpoint"));
+        assertEquals("/index1,index2/_endpoint/suffix1,suffix2",
+                RequestConverters.endpoint(new String[] { "index1", "index2" }, "_endpoint", new String[] { "suffix1", "suffix2" }));
     }
 
     public void testCreateContentType() {
@@ -1673,20 +1729,22 @@ public class RequestConvertersTests extends ESTestCase {
 
         XContentType bulkContentType = randomBoolean() ? xContentType : null;
 
-        IllegalArgumentException exception = expectThrows(IllegalArgumentException.class, () ->
-                enforceSameContentType(new IndexRequest().source(singletonMap("field", "value"), XContentType.CBOR), bulkContentType));
+        IllegalArgumentException exception = expectThrows(IllegalArgumentException.class,
+                () -> enforceSameContentType(new IndexRequest().source(singletonMap("field", "value"), XContentType.CBOR),
+                        bulkContentType));
         assertEquals("Unsupported content-type found for request with content-type [CBOR], only JSON and SMILE are supported",
                 exception.getMessage());
 
-        exception = expectThrows(IllegalArgumentException.class, () ->
-                enforceSameContentType(new IndexRequest().source(singletonMap("field", "value"), XContentType.YAML), bulkContentType));
+        exception = expectThrows(IllegalArgumentException.class,
+                () -> enforceSameContentType(new IndexRequest().source(singletonMap("field", "value"), XContentType.YAML),
+                        bulkContentType));
         assertEquals("Unsupported content-type found for request with content-type [YAML], only JSON and SMILE are supported",
                 exception.getMessage());
 
         XContentType requestContentType = xContentType == XContentType.JSON ? XContentType.SMILE : XContentType.JSON;
 
-        exception = expectThrows(IllegalArgumentException.class, () ->
-                enforceSameContentType(new IndexRequest().source(singletonMap("field", "value"), requestContentType), xContentType));
+        exception = expectThrows(IllegalArgumentException.class,
+                () -> enforceSameContentType(new IndexRequest().source(singletonMap("field", "value"), requestContentType), xContentType));
         assertEquals("Mismatching content-type found for request with content-type [" + requestContentType + "], "
                 + "previous requests have content-type [" + xContentType + "]", exception.getMessage());
     }
@@ -1754,11 +1812,10 @@ public class RequestConvertersTests extends ESTestCase {
     }
 
     private static void setRandomIndicesOptions(Consumer<IndicesOptions> setter, Supplier<IndicesOptions> getter,
-                                                Map<String, String> expectedParams) {
+            Map<String, String> expectedParams) {
 
         if (randomBoolean()) {
-            setter.accept(IndicesOptions.fromOptions(randomBoolean(), randomBoolean(), randomBoolean(),
-                randomBoolean()));
+            setter.accept(IndicesOptions.fromOptions(randomBoolean(), randomBoolean(), randomBoolean(), randomBoolean()));
         }
         expectedParams.put("ignore_unavailable", Boolean.toString(getter.get().ignoreUnavailable()));
         expectedParams.put("allow_no_indices", Boolean.toString(getter.get().allowNoIndices()));

client/rest-high-level/src/test/java/org/elasticsearch/client/documentation/ClusterClientDocumentationIT.java

@@ -19,8 +19,14 @@
 
 package org.elasticsearch.client.documentation;
 
+import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.action.FailedNodeException;
 import org.elasticsearch.action.LatchedActionListener;
+import org.elasticsearch.action.TaskOperationFailure;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksRequest;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksResponse;
+import org.elasticsearch.action.admin.cluster.node.tasks.list.TaskGroup;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsRequest;
 import org.elasticsearch.action.admin.cluster.settings.ClusterUpdateSettingsResponse;
 import org.elasticsearch.client.ESRestHighLevelClientTestCase;
@@ -31,14 +37,20 @@ import org.elasticsearch.common.unit.ByteSizeUnit;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.indices.recovery.RecoverySettings;
+import org.elasticsearch.tasks.TaskId;
+import org.elasticsearch.tasks.TaskInfo;
 
 import java.io.IOException;
 import java.util.HashMap;
+import java.util.List;
 import java.util.Map;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.TimeUnit;
 
+import static java.util.Collections.emptyList;
 import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+import static org.hamcrest.Matchers.notNullValue;
 
 /**
  * This class is used to generate the Java Cluster API documentation.
@@ -177,4 +189,87 @@ public class ClusterClientDocumentationIT extends ESRestHighLevelClientTestCase
             assertTrue(latch.await(30L, TimeUnit.SECONDS));
         }
     }
+
+    public void testListTasks() throws IOException {
+        RestHighLevelClient client = highLevelClient();
+        {
+            // tag::list-tasks-request
+            ListTasksRequest request = new ListTasksRequest();
+            // end::list-tasks-request
+
+            // tag::list-tasks-request-filter
+            request.setActions("cluster:*"); // <1>
+            request.setNodes("nodeId1", "nodeId2"); // <2>
+            request.setParentTaskId(new TaskId("parentTaskId", 42)); // <3>
+            // end::list-tasks-request-filter
+
+            // tag::list-tasks-request-detailed
+            request.setDetailed(true); // <1>
+            // end::list-tasks-request-detailed
+
+            // tag::list-tasks-request-wait-completion
+            request.setWaitForCompletion(true); // <1>
+            request.setTimeout(TimeValue.timeValueSeconds(50)); // <2>
+            request.setTimeout("50s"); // <3>
+            // end::list-tasks-request-wait-completion
+        }
+
+        ListTasksRequest request = new ListTasksRequest();
+
+        // tag::list-tasks-execute
+        ListTasksResponse response = client.cluster().listTasks(request);
+        // end::list-tasks-execute
+
+        assertThat(response, notNullValue());
+
+        // tag::list-tasks-response-tasks
+        List<TaskInfo> tasks = response.getTasks(); // <1>
+        // end::list-tasks-response-tasks
+
+        // tag::list-tasks-response-calc
+        Map<String, List<TaskInfo>> perNodeTasks = response.getPerNodeTasks(); // <1>
+        List<TaskGroup> groups = response.getTaskGroups(); // <2>
+        // end::list-tasks-response-calc
+
+        // tag::list-tasks-response-failures
+        List<ElasticsearchException> nodeFailures = response.getNodeFailures(); // <1>
+        List<TaskOperationFailure> taskFailures = response.getTaskFailures(); // <2>
+        // end::list-tasks-response-failures
+
+        assertThat(response.getNodeFailures(), equalTo(emptyList()));
+        assertThat(response.getTaskFailures(), equalTo(emptyList()));
+        assertThat(response.getTasks().size(), greaterThanOrEqualTo(2));
+    }
+
+    public void testListTasksAsync() throws Exception {
+        RestHighLevelClient client = highLevelClient();
+        {
+            ListTasksRequest request = new ListTasksRequest();
+
+            // tag::list-tasks-execute-listener
+            ActionListener<ListTasksResponse> listener =
+                    new ActionListener<ListTasksResponse>() {
+                        @Override
+                        public void onResponse(ListTasksResponse response) {
+                            // <1>
+                        }
+
+                        @Override
+                        public void onFailure(Exception e) {
+                            // <2>
+                        }
+                    };
+            // end::list-tasks-execute-listener
+
+            // Replace the empty listener by a blocking listener in test
+            final CountDownLatch latch = new CountDownLatch(1);
+            listener = new LatchedActionListener<>(listener, latch);
+
+            // tag::list-tasks-execute-async
+            client.cluster().listTasksAsync(request, listener); // <1>
+            // end::list-tasks-execute-async
+
+            assertTrue(latch.await(30L, TimeUnit.SECONDS));
+        }
+    }
 }

distribution/archives/build.gradle

@@ -224,7 +224,7 @@ subprojects {
       doLast {
         // this is just a small sample from the C++ notices, the idea being that if we've added these lines we've probably added all the required lines
         final List<String> expectedLines = Arrays.asList("Apache log4cxx", "Boost Software License - Version 1.0 - August 17th, 2003")
-        final Path noticePath = archiveExtractionDir.toPath().resolve("elasticsearch-${VersionProperties.elasticsearch}/modules/x-pack/x-pack-ml/NOTICE.txt")
+        final Path noticePath = archiveExtractionDir.toPath().resolve("elasticsearch-${VersionProperties.elasticsearch}/modules/x-pack-ml/NOTICE.txt")
         final List<String> actualLines = Files.readAllLines(noticePath)
         for (final String expectedLine : expectedLines) {
           if (actualLines.contains(expectedLine) == false) {

distribution/build.gradle

@@ -201,17 +201,14 @@ project.rootProject.subprojects.findAll { it.parent.path == ':modules' }.each {
 
 // use licenses from each of the bundled xpack plugins
 Project xpack = project(':x-pack:plugin')
-xpack.subprojects.findAll { it.name != 'bwc' }.each { Project xpackSubproject ->
-  File licenses = new File(xpackSubproject.projectDir, 'licenses')
+xpack.subprojects.findAll { it.parent == xpack }.each { Project xpackModule ->
+  File licenses = new File(xpackModule.projectDir, 'licenses')
   if (licenses.exists()) {
     buildDefaultNotice.licensesDir licenses 
   }
+  copyModule(processDefaultOutputs, xpackModule)
+  copyLog4jProperties(buildDefaultLog4jConfig, xpackModule)
 }
-// but copy just the top level meta plugin to the default modules
-copyModule(processDefaultOutputs, xpack)
-copyLog4jProperties(buildDefaultLog4jConfig, xpack)
-
-// 
 
 // make sure we have a clean task since we aren't a java project, but we have tasks that
 // put stuff in the build dir

docs/java-rest/high-level/cluster/list_tasks.asciidoc

@@ -0,0 +1,101 @@
+[[java-rest-high-cluster-list-tasks]]
+=== List Tasks API
+
+The List Tasks API allows to get information about the tasks currently executing in the cluster.
+
+[[java-rest-high-cluster-list-tasks-request]]
+==== List Tasks Request
+
+A `ListTasksRequest`:
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-request]
+--------------------------------------------------
+There is no required parameters. By default the client will list all tasks and will not wait
+for task completion.
+
+==== Parameters
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-request-filter]
+--------------------------------------------------
+<1> Request only cluster-related tasks
+<2> Request all tasks running on nodes nodeId1 and nodeId2
+<3> Request only children of a particular task
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-request-detailed]
+--------------------------------------------------
+<1> Should the information include detailed, potentially slow to generate data. Defaults to `false`
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-request-wait-completion]
+--------------------------------------------------
+<1> Should this request wait for all found tasks to complete. Defaults to `false`
+<2> Timeout for the request as a `TimeValue`. Applicable only if `setWaitForCompletion` is `true`.
+Defaults to 30 seconds
+<3> Timeout as a `String`
+
+[[java-rest-high-cluster-list-tasks-sync]]
+==== Synchronous Execution
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-execute]
+--------------------------------------------------
+
+[[java-rest-high-cluster-list-tasks-async]]
+==== Asynchronous Execution
+
+The asynchronous execution of a cluster update settings requires both the
+`ListTasksRequest` instance and an `ActionListener` instance to be
+passed to the asynchronous method:
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-execute-async]
+--------------------------------------------------
+<1> The `ListTasksRequest` to execute and the `ActionListener` to use
+when the execution completes
+
+The asynchronous method does not block and returns immediately. Once it is
+completed the `ActionListener` is called back using the `onResponse` method
+if the execution successfully completed or using the `onFailure` method if
+it failed.
+
+A typical listener for `ListTasksResponse` looks like:
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-execute-listener]
+--------------------------------------------------
+<1> Called when the execution is successfully completed. The response is
+provided as an argument
+<2> Called in case of a failure. The raised exception is provided as an argument
+
+[[java-rest-high-cluster-list-tasks-response]]
+==== List Tasks Response
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-response-tasks]
+--------------------------------------------------
+<1> List of currently running tasks
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-response-calc]
+--------------------------------------------------
+<1> List of tasks grouped by a node
+<2> List of tasks grouped by a parent task
+
+["source","java",subs="attributes,callouts,macros"]
+--------------------------------------------------
+include-tagged::{doc-tests}/ClusterClientDocumentationIT.java[list-tasks-response-failures]
+--------------------------------------------------
+<1> List of node failures
+<2> List of tasks failures

docs/java-rest/high-level/supported-apis.asciidoc

@@ -104,8 +104,10 @@ include::indices/put_template.asciidoc[]
 The Java High Level REST Client supports the following Cluster APIs:
 
 * <<java-rest-high-cluster-put-settings>>
+* <<java-rest-high-cluster-list-tasks>>
 
 include::cluster/put_settings.asciidoc[]
+include::cluster/list_tasks.asciidoc[]
 
 == Snapshot APIs
 
@@ -114,4 +116,4 @@ The Java High Level REST Client supports the following Snapshot APIs:
 * <<java-rest-high-snapshot-get-repository>>
 
 include::snapshot/get_repository.asciidoc[]
-include::snapshot/create_repository.asciidoc[]
+include::snapshot/create_repository.asciidoc[]

docs/reference/aggregations/pipeline.asciidoc

@@ -72,6 +72,7 @@ POST /_search
 }
 --------------------------------------------------
 // CONSOLE
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 <1> The metric is called `"the_sum"`
 <2> The `buckets_path` refers to the metric via a relative path `"the_sum"`
 
@@ -136,6 +137,7 @@ POST /_search
 }
 --------------------------------------------------
 // CONSOLE
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 <1> By using `_count` instead of a metric name, we can calculate the moving average of document counts in the histogram
 
 The `buckets_path` can also use `"_bucket_count"` and path to a multi-bucket aggregation to use the number of buckets
@@ -231,6 +233,7 @@ include::pipeline/stats-bucket-aggregation.asciidoc[]
 include::pipeline/extended-stats-bucket-aggregation.asciidoc[]
 include::pipeline/percentiles-bucket-aggregation.asciidoc[]
 include::pipeline/movavg-aggregation.asciidoc[]
+include::pipeline/movfn-aggregation.asciidoc[]
 include::pipeline/cumulative-sum-aggregation.asciidoc[]
 include::pipeline/bucket-script-aggregation.asciidoc[]
 include::pipeline/bucket-selector-aggregation.asciidoc[]

docs/reference/aggregations/pipeline/movavg-aggregation.asciidoc

@@ -1,6 +1,10 @@
 [[search-aggregations-pipeline-movavg-aggregation]]
 === Moving Average Aggregation
 
+deprecated[6.4.0, The Moving Average aggregation has been deprecated in favor of the more general
+<<search-aggregations-pipeline-movfn-aggregation,Moving Function Aggregation>>.  The new Moving Function aggregation provides
+all the same functionality as the Moving Average aggregation, but also provides more flexibility.]
+
 Given an ordered series of data, the Moving Average aggregation will slide a window across the data and emit the average
 value of that window.  For example, given the data `[1, 2, 3, 4, 5, 6, 7, 8, 9, 10]`, we can calculate a simple moving
 average with windows size of `5` as follows:
@@ -74,6 +78,7 @@ POST /_search
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:sales]
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 
 <1> A `date_histogram` named "my_date_histo" is constructed on the "timestamp" field, with one-day intervals
 <2> A `sum` metric is used to calculate the sum of a field.  This could be any metric (sum, min, max, etc)
@@ -180,6 +185,7 @@ POST /_search
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:sales]
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 
 A `simple` model has no special settings to configure
 
@@ -233,6 +239,7 @@ POST /_search
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:sales]
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 
 A `linear` model has no special settings to configure
 
@@ -295,7 +302,7 @@ POST /_search
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:sales]
-
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 
 [[single_0.2alpha]]
 .EWMA with window of size 10, alpha = 0.2
@@ -355,6 +362,7 @@ POST /_search
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:sales]
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 
 In practice, the `alpha` value behaves very similarly in `holt` as `ewma`: small values produce more smoothing
 and more lag, while larger values produce closer tracking and less lag.  The value of `beta` is often difficult
@@ -446,7 +454,7 @@ POST /_search
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:sales]
-
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 
 [[holt_winters_add]]
 .Holt-Winters moving average with window of size 120, alpha = 0.5, beta = 0.7, gamma = 0.3, period = 30
@@ -508,6 +516,7 @@ POST /_search
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:sales]
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 
 ==== Prediction
 
@@ -550,6 +559,7 @@ POST /_search
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:sales]
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 
 The `simple`, `linear` and `ewma` models all produce "flat" predictions: they essentially converge on the mean
 of the last value in the series, producing a flat:
@@ -631,6 +641,7 @@ POST /_search
 --------------------------------------------------
 // CONSOLE
 // TEST[setup:sales]
+// TEST[warning:The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.]
 
 <1> Minimization is enabled with the `minimize` parameter
 

docs/reference/aggregations/pipeline/movfn-aggregation.asciidoc

@@ -0,0 +1,633 @@
+[[search-aggregations-pipeline-movfn-aggregation]]
+=== Moving Function Aggregation
+
+Given an ordered series of data, the Moving Function aggregation will slide a window across the data and allow the user to specify a custom
+script that is executed on each window of data.  For convenience, a number of common functions are predefined such as min/max, moving averages,
+etc.
+
+This is conceptually very similar to the <<search-aggregations-pipeline-movavg-aggregation, Moving Average>> pipeline aggregation, except
+it provides more functionality.
+==== Syntax
+
+A `moving_fn` aggregation looks like this in isolation:
+
+[source,js]
+--------------------------------------------------
+{
+    "moving_fn": {
+        "buckets_path": "the_sum",
+        "window": 10,
+        "script": "MovingFunctions.min(values)"
+    }
+}
+--------------------------------------------------
+// NOTCONSOLE
+
+.`moving_avg` Parameters
+|===
+|Parameter Name |Description |Required |Default Value
+|`buckets_path` |Path to the metric of interest (see <<buckets-path-syntax, `buckets_path` Syntax>> for more details |Required |
+|`window` |The size of window to "slide" across the histogram. |Required |
+|`script` |The script that should be executed on each window of data |Required |
+|===
+
+`moving_fn` aggregations must be embedded inside of a `histogram` or `date_histogram` aggregation.  They can be
+embedded like any other metric aggregation:
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{                <1>
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" } <2>
+                },
+                "the_movfn": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum", <3>
+                        "window": 10,
+                        "script": "MovingFunctions.unweightedAvg(values)"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+<1> A `date_histogram` named "my_date_histo" is constructed on the "timestamp" field, with one-day intervals
+<2> A `sum` metric is used to calculate the sum of a field.  This could be any numeric metric (sum, min, max, etc)
+<3> Finally, we specify a `moving_fn` aggregation which uses "the_sum" metric as its input.
+
+Moving averages are built by first specifying a `histogram` or `date_histogram` over a field.  You can then optionally
+add numeric metrics, such as a `sum`, inside of that histogram.  Finally, the `moving_fn` is embedded inside the histogram.
+The `buckets_path` parameter is then used to "point" at one of the sibling metrics inside of the histogram (see
+<<buckets-path-syntax>> for a description of the syntax for `buckets_path`.
+
+An example response from the above aggregation may look like:
+
+[source,js]
+--------------------------------------------------
+{
+   "took": 11,
+   "timed_out": false,
+   "_shards": ...,
+   "hits": ...,
+   "aggregations": {
+      "my_date_histo": {
+         "buckets": [
+             {
+                 "key_as_string": "2015/01/01 00:00:00",
+                 "key": 1420070400000,
+                 "doc_count": 3,
+                 "the_sum": {
+                    "value": 550.0
+                 },
+                 "the_movfn": {
+                    "value": null
+                 }
+             },
+             {
+                 "key_as_string": "2015/02/01 00:00:00",
+                 "key": 1422748800000,
+                 "doc_count": 2,
+                 "the_sum": {
+                    "value": 60.0
+                 },
+                 "the_movfn": {
+                    "value": 550.0
+                 }
+             },
+             {
+                 "key_as_string": "2015/03/01 00:00:00",
+                 "key": 1425168000000,
+                 "doc_count": 2,
+                 "the_sum": {
+                    "value": 375.0
+                 },
+                 "the_movfn": {
+                    "value": 305.0
+                 }
+             }
+         ]
+      }
+   }
+}
+--------------------------------------------------
+// TESTRESPONSE[s/"took": 11/"took": $body.took/]
+// TESTRESPONSE[s/"_shards": \.\.\./"_shards": $body._shards/]
+// TESTRESPONSE[s/"hits": \.\.\./"hits": $body.hits/]
+
+
+==== Custom user scripting
+
+The Moving Function aggregation allows the user to specify any arbitrary script to define custom logic.  The script is invoked each time a
+new window of data is collected.  These values are provided to the script in the `values` variable.  The script should then perform some
+kind of calculation and emit a single `double` as the result.  Emitting `null` is not permitted, although `NaN` and +/- `Inf` are allowed.
+
+For example, this script will simply return the first value from the window, or `NaN` if no values are available:
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_movavg": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "return values.length > 0 ? values[0] : Double.NaN"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+==== Pre-built Functions
+
+For convenience, a number of functions have been prebuilt and are available inside the `moving_fn` script context:
+
+- `max()`
+- `min()`
+- `sum()`
+- `stdDev()`
+- `unweightedAvg()`
+- `linearWeightedAvg()`
+- `ewma()`
+- `holt()`
+- `holtWinters()`
+
+The functions are available from the `MovingFunctions` namespace.  E.g. `MovingFunctions.max()`
+
+===== max Function
+
+This function accepts a collection of doubles and returns the maximum value in that window. `null` and `NaN` values are ignored; the maximum
+is only calculated over the real values. If the window is empty, or all values are `null`/`NaN`, `NaN` is returned as the result.
+
+.`max(double[] values)` Parameters
+|===
+|Parameter Name |Description
+|`values` |The window of values to find the maximum
+|===
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_moving_max": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "MovingFunctions.max(values)"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+===== min Function
+
+This function accepts a collection of doubles and returns the minimum value in that window.  `null` and `NaN` values are ignored; the minimum
+is only calculated over the real values. If the window is empty, or all values are `null`/`NaN`, `NaN` is returned as the result.
+
+.`min(double[] values)` Parameters
+|===
+|Parameter Name |Description
+|`values` |The window of values to find the minimum
+|===
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_moving_min": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "MovingFunctions.min(values)"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+===== sum Function
+
+This function accepts a collection of doubles and returns the sum of the values in that window.  `null` and `NaN` values are ignored;
+the sum is only calculated over the real values.  If the window is empty, or all values are `null`/`NaN`, `0.0` is returned as the result.
+
+.`sum(double[] values)` Parameters
+|===
+|Parameter Name |Description
+|`values` |The window of values to find the sum of
+|===
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_moving_sum": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "MovingFunctions.sum(values)"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+===== stdDev Function
+
+This function accepts a collection of doubles and and average, then returns the standard deviation of the values in that window.
+`null` and `NaN` values are ignored; the sum is only calculated over the real values.  If the window is empty, or all values are
+`null`/`NaN`, `0.0` is returned as the result.
+
+.`stdDev(double[] values)` Parameters
+|===
+|Parameter Name |Description
+|`values` |The window of values to find the standard deviation of
+|`avg` |The average of the window
+|===
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_moving_sum": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "MovingFunctions.stdDev(values, MovingFunctions.unweightedAvg(values))"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+The `avg` parameter must be provided to the standard deviation function because different styles of averages can be computed on the window
+(simple, linearly weighted, etc).  The various moving averages that are detailed below can be used to calculate the average for the
+standard deviation function.
+
+===== unweightedAvg Function
+
+The `unweightedAvg` function calculates the sum of all values in the window, then divides by the size of the window.  It is effectively
+a simple arithmetic mean of the window.  The simple moving average does not perform any time-dependent weighting, which means
+the values from a `simple` moving average tend to "lag" behind the real data.
+
+`null` and `NaN` values are ignored; the average is only calculated over the real values. If the window is empty, or all values are
+`null`/`NaN`, `NaN` is returned as the result.  This means that the count used in the average calculation is count of non-`null`,non-`NaN`
+values.
+
+.`unweightedAvg(double[] values)` Parameters
+|===
+|Parameter Name |Description
+|`values` |The window of values to find the sum of
+|===
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_movavg": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "MovingFunctions.unweightedAvg(values)"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+==== linearWeightedAvg Function
+
+The `linearWeightedAvg` function assigns a linear weighting to points in the series, such that "older" datapoints (e.g. those at
+the beginning of the window) contribute a linearly less amount to the total average.  The linear weighting helps reduce
+the "lag" behind the data's mean, since older points have less influence.
+
+If the window is empty, or all values are `null`/`NaN`, `NaN` is returned as the result.
+
+.`linearWeightedAvg(double[] values)` Parameters
+|===
+|Parameter Name |Description
+|`values` |The window of values to find the sum of
+|===
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_movavg": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "MovingFunctions.linearWeightedAvg(values)"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+==== ewma Function
+
+The `ewma` function (aka "single-exponential") is similar to the `linearMovAvg` function,
+except older data-points become exponentially less important,
+rather than linearly less important.  The speed at which the importance decays can be controlled with an `alpha`
+setting.  Small values make the weight decay slowly, which provides greater smoothing and takes into account a larger
+portion of the window.  Larger valuers make the weight decay quickly, which reduces the impact of older values on the
+moving average.  This tends to make the moving average track the data more closely but with less smoothing.
+
+`null` and `NaN` values are ignored; the average is only calculated over the real values. If the window is empty, or all values are
+`null`/`NaN`, `NaN` is returned as the result.  This means that the count used in the average calculation is count of non-`null`,non-`NaN`
+values.
+
+.`ewma(double[] values, double alpha)` Parameters
+|===
+|Parameter Name |Description
+|`values` |The window of values to find the sum of
+|`alpha` |Exponential decay
+|===
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_movavg": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "MovingFunctions.ewma(values, 0.3)"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+
+==== holt Function
+
+The `holt` function (aka "double exponential") incorporates a second exponential term which
+tracks the data's trend.  Single exponential does not perform well when the data has an underlying linear trend.  The
+double exponential model calculates two values internally: a "level" and a "trend".
+
+The level calculation is similar to `ewma`, and is an exponentially weighted view of the data.  The difference is
+that the previously smoothed value is used instead of the raw value, which allows it to stay close to the original series.
+The trend calculation looks at the difference between the current and last value (e.g. the slope, or trend, of the
+smoothed data).  The trend value is also exponentially weighted.
+
+Values are produced by multiplying the level and trend components.
+
+`null` and `NaN` values are ignored; the average is only calculated over the real values. If the window is empty, or all values are
+`null`/`NaN`, `NaN` is returned as the result.  This means that the count used in the average calculation is count of non-`null`,non-`NaN`
+values.
+
+.`holt(double[] values, double alpha)` Parameters
+|===
+|Parameter Name |Description
+|`values` |The window of values to find the sum of
+|`alpha` |Level decay value
+|`beta` |Trend decay value
+|===
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_movavg": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "MovingFunctions.holt(values, 0.3, 0.1)"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+In practice, the `alpha` value behaves very similarly in `holtMovAvg` as `ewmaMovAvg`: small values produce more smoothing
+and more lag, while larger values produce closer tracking and less lag.  The value of `beta` is often difficult
+to see.  Small values emphasize long-term trends (such as a constant linear trend in the whole series), while larger
+values emphasize short-term trends.
+
+==== holtWinters Function
+
+The `holtWinters` function (aka "triple exponential") incorporates a third exponential term which
+tracks the seasonal aspect of your data.  This aggregation therefore smooths based on three components: "level", "trend"
+and "seasonality".
+
+The level and trend calculation is identical to `holt` The seasonal calculation looks at the difference between
+the current point, and the point one period earlier.
+
+Holt-Winters requires a little more handholding than the other moving averages.  You need to specify the "periodicity"
+of your data: e.g. if your data has cyclic trends every 7 days, you would set `period = 7`.  Similarly if there was
+a monthly trend, you would set it to `30`.  There is currently no periodicity detection, although that is planned
+for future enhancements.
+
+`null` and `NaN` values are ignored; the average is only calculated over the real values. If the window is empty, or all values are
+`null`/`NaN`, `NaN` is returned as the result.  This means that the count used in the average calculation is count of non-`null`,non-`NaN`
+values.
+
+.`holtWinters(double[] values, double alpha)` Parameters
+|===
+|Parameter Name |Description
+|`values` |The window of values to find the sum of
+|`alpha` |Level decay value
+|`beta` |Trend decay value
+|`gamma` |Seasonality decay value
+|`period` |The periodicity of the data
+|`multiplicative` |True if you wish to use multiplicative holt-winters, false to use additive
+|===
+
+[source,js]
+--------------------------------------------------
+POST /_search
+{
+    "size": 0,
+    "aggs": {
+        "my_date_histo":{
+            "date_histogram":{
+                "field":"date",
+                "interval":"1M"
+            },
+            "aggs":{
+                "the_sum":{
+                    "sum":{ "field": "price" }
+                },
+                "the_movavg": {
+                    "moving_fn": {
+                        "buckets_path": "the_sum",
+                        "window": 10,
+                        "script": "if (values.length > 5*2) {MovingFunctions.holtWinters(values, 0.3, 0.1, 0.1, 5, false)}"
+                    }
+                }
+            }
+        }
+    }
+}
+--------------------------------------------------
+// CONSOLE
+// TEST[setup:sales]
+
+[WARNING]
+======
+Multiplicative Holt-Winters works by dividing each data point by the seasonal value.  This is problematic if any of
+your data is zero, or if there are gaps in the data (since this results in a divid-by-zero).  To combat this, the
+`mult` Holt-Winters pads all values by a very small amount (1*10^-10^) so that all values are non-zero.  This affects
+the result, but only minimally.  If your data is non-zero, or you prefer to see `NaN` when zero's are encountered,
+you can disable this behavior with `pad: false`
+======
+
+===== "Cold Start"
+
+Unfortunately, due to the nature of Holt-Winters, it requires two periods of data to "bootstrap" the algorithm.  This
+means that your `window` must always be *at least* twice the size of your period.  An exception will be thrown if it
+isn't.  It also means that Holt-Winters will not emit a value for the first `2 * period` buckets; the current algorithm
+does not backcast.
+
+You'll notice in the above example we have an `if ()` statement checking the size of values.  This is checking to make sure
+we have two periods worth of data (`5 * 2`, where 5 is the period specified in the `holtWintersMovAvg` function) before calling
+the holt-winters function.

modules/lang-painless/src/main/java/org/elasticsearch/painless/PainlessPlugin.java

@@ -32,6 +32,7 @@ import org.elasticsearch.common.settings.SettingsFilter;
 import org.elasticsearch.painless.spi.PainlessExtension;
 import org.elasticsearch.painless.spi.Whitelist;
 import org.elasticsearch.plugins.ActionPlugin;
+import org.elasticsearch.painless.spi.WhitelistLoader;
 import org.elasticsearch.plugins.ExtensiblePlugin;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.plugins.ScriptPlugin;
@@ -39,6 +40,7 @@ import org.elasticsearch.rest.RestController;
 import org.elasticsearch.rest.RestHandler;
 import org.elasticsearch.script.ScriptContext;
 import org.elasticsearch.script.ScriptEngine;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctionScript;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -55,18 +57,34 @@ import java.util.function.Supplier;
  */
 public final class PainlessPlugin extends Plugin implements ScriptPlugin, ExtensiblePlugin, ActionPlugin {
 
-    private final Map<ScriptContext<?>, List<Whitelist>> extendedWhitelists = new HashMap<>();
+    private static final Map<ScriptContext<?>, List<Whitelist>> whitelists;
+
+    /*
+     * Contexts from Core that need custom whitelists can add them to the map below.
+     * Whitelist resources should be added as appropriately named, separate files
+     * under Painless' resources
+     */
+    static {
+        Map<ScriptContext<?>, List<Whitelist>> map = new HashMap<>();
+
+        // Moving Function Pipeline Agg
+        List<Whitelist> movFn = new ArrayList<>(Whitelist.BASE_WHITELISTS);
+        movFn.add(WhitelistLoader.loadFromResourceFiles(Whitelist.class, "org.elasticsearch.aggs.movfn.txt"));
+        map.put(MovingFunctionScript.CONTEXT, movFn);
+
+        whitelists = map;
+    }
 
     @Override
     public ScriptEngine getScriptEngine(Settings settings, Collection<ScriptContext<?>> contexts) {
         Map<ScriptContext<?>, List<Whitelist>> contextsWithWhitelists = new HashMap<>();
         for (ScriptContext<?> context : contexts) {
             // we might have a context that only uses the base whitelists, so would not have been filled in by reloadSPI
-            List<Whitelist> whitelists = extendedWhitelists.get(context);
-            if (whitelists == null) {
-                whitelists = new ArrayList<>(Whitelist.BASE_WHITELISTS);
+            List<Whitelist> contextWhitelists = whitelists.get(context);
+            if (contextWhitelists == null) {
+                contextWhitelists = new ArrayList<>(Whitelist.BASE_WHITELISTS);
             }
-            contextsWithWhitelists.put(context, whitelists);
+            contextsWithWhitelists.put(context, contextWhitelists);
         }
         return new PainlessScriptEngine(settings, contextsWithWhitelists);
     }
@@ -80,7 +98,7 @@ public final class PainlessPlugin extends Plugin implements ScriptPlugin, Extens
     public void reloadSPI(ClassLoader loader) {
         for (PainlessExtension extension : ServiceLoader.load(PainlessExtension.class, loader)) {
             for (Map.Entry<ScriptContext<?>, List<Whitelist>> entry : extension.getContextWhitelists().entrySet()) {
-                List<Whitelist> existing = extendedWhitelists.computeIfAbsent(entry.getKey(),
+                List<Whitelist> existing = whitelists.computeIfAbsent(entry.getKey(),
                     c -> new ArrayList<>(Whitelist.BASE_WHITELISTS));
                 existing.addAll(entry.getValue());
             }

modules/lang-painless/src/main/resources/org/elasticsearch/painless/spi/org.elasticsearch.aggs.movfn.txt

@@ -0,0 +1,32 @@
+#
+# Licensed to Elasticsearch under one or more contributor
+# license agreements. See the NOTICE file distributed with
+# this work for additional information regarding copyright
+# ownership. Elasticsearch licenses this file to you under
+# the Apache License, Version 2.0 (the "License"); you may
+# not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+#
+
+# This file contains a whitelist for the Moving Function pipeline aggregator in core
+
+class org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctions {
+  double max(double[])
+  double min(double[])
+  double sum(double[])
+  double stdDev(double[], double)
+  double unweightedAvg(double[])
+  double linearWeightedAvg(double[])
+  double ewma(double[], double)
+  double holt(double[], double, double)
+  double holtWinters(double[], double, double, double, int, boolean)
+}

modules/lang-painless/src/test/resources/rest-api-spec/test/painless/70_mov_fn_agg.yml

@@ -0,0 +1,315 @@
+# Sanity integration test to make sure the custom context and whitelist work for moving_fn pipeline agg
+#
+setup:
+  - skip:
+        version: " - 6.4.0"
+        reason:  "moving_fn added in 6.4.0"
+  - do:
+      indices.create:
+        index: test
+        body:
+            mappings:
+              _doc:
+                properties:
+                  value_field:
+                    type: integer
+                  date:
+                    type: date
+
+  - do:
+       bulk:
+         refresh: true
+         body:
+           - index:
+               _index: test
+               _type:  _doc
+               _id:    1
+           - date: "2017-01-01T00:00:00"
+             value_field: 1
+           - index:
+               _index: test
+               _type:  _doc
+               _id:    2
+           - date: "2017-01-02T00:00:00"
+             value_field: 2
+           - index:
+               _index: test
+               _type:  _doc
+               _id:    3
+           - date: "2017-01-03T00:00:00"
+             value_field: 3
+           - index:
+               _index: test
+               _type:  _doc
+               _id:    4
+           - date: "2017-01-04T00:00:00"
+             value_field: 4
+           - index:
+               _index: test
+               _type:  _doc
+               _id:    5
+           - date: "2017-01-05T00:00:00"
+             value_field: 5
+           - index:
+               _index: test
+               _type:  _doc
+               _id:    6
+           - date: "2017-01-06T00:00:00"
+             value_field: 6
+
+  - do:
+      indices.refresh:
+        index: [test]
+
+---
+"max":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: 3
+                    script: "MovingFunctions.max(values)"
+
+  - match: { hits.total: 6 }
+  - length: { hits.hits: 0 }
+  - is_false: aggregations.the_histo.buckets.0.the_mov_fn.value
+  - match: { aggregations.the_histo.buckets.1.the_mov_fn.value: 1.0 }
+  - match: { aggregations.the_histo.buckets.2.the_mov_fn.value: 2.0 }
+  - match: { aggregations.the_histo.buckets.3.the_mov_fn.value: 3.0 }
+  - match: { aggregations.the_histo.buckets.4.the_mov_fn.value: 4.0 }
+  - match: { aggregations.the_histo.buckets.5.the_mov_fn.value: 5.0 }
+
+---
+"min":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: 3
+                    script: "MovingFunctions.min(values)"
+
+  - match: { hits.total: 6 }
+  - length: { hits.hits: 0 }
+  - is_false: aggregations.the_histo.buckets.0.the_mov_fn.value
+  - match: { aggregations.the_histo.buckets.1.the_mov_fn.value: 1.0 }
+  - match: { aggregations.the_histo.buckets.2.the_mov_fn.value: 1.0 }
+  - match: { aggregations.the_histo.buckets.3.the_mov_fn.value: 1.0 }
+  - match: { aggregations.the_histo.buckets.4.the_mov_fn.value: 2.0 }
+  - match: { aggregations.the_histo.buckets.5.the_mov_fn.value: 3.0 }
+
+---
+"sum":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: 3
+                    script: "MovingFunctions.sum(values)"
+
+  - match: { hits.total: 6 }
+  - length: { hits.hits: 0 }
+  - match: { aggregations.the_histo.buckets.0.the_mov_fn.value: 0.0 }
+  - match: { aggregations.the_histo.buckets.1.the_mov_fn.value: 1.0 }
+  - match: { aggregations.the_histo.buckets.2.the_mov_fn.value: 3.0 }
+  - match: { aggregations.the_histo.buckets.3.the_mov_fn.value: 6.0 }
+  - match: { aggregations.the_histo.buckets.4.the_mov_fn.value: 9.0 }
+  - match: { aggregations.the_histo.buckets.5.the_mov_fn.value: 12.0 }
+
+---
+"unweightedAvg":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: 3
+                    script: "MovingFunctions.unweightedAvg(values)"
+
+  - match: { hits.total: 6 }
+  - length: { hits.hits: 0 }
+
+
+---
+"linearWeightedAvg":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: 3
+                    script: "MovingFunctions.linearWeightedAvg(values)"
+
+  - match: { hits.total: 6 }
+  - length: { hits.hits: 0 }
+
+
+---
+"ewma":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: 3
+                    script: "MovingFunctions.ewma(values, 0.1)"
+
+  - match: { hits.total: 6 }
+  - length: { hits.hits: 0 }
+
+
+---
+"holt":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: 3
+                    script: "MovingFunctions.holt(values, 0.1, 0.1)"
+
+  - match: { hits.total: 6 }
+  - length: { hits.hits: 0 }
+
+
+---
+"holtWinters":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: 1
+                    script: "if (values.length > 1) { MovingFunctions.holtWinters(values, 0.1, 0.1, 0.1, 1, true)}"
+
+  - match: { hits.total: 6 }
+  - length: { hits.hits: 0 }
+
+---
+"stdDev":
+
+  - do:
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: 3
+                    script: "MovingFunctions.stdDev(values, MovingFunctions.unweightedAvg(values))"
+
+  - match: { hits.total: 6 }
+  - length: { hits.hits: 0 }
+
+
+
+
+
+

modules/percolator/src/main/java/org/elasticsearch/percolator/PercolatorFieldMapper.java

@@ -161,7 +161,7 @@ public class PercolatorFieldMapper extends FieldMapper {
         }
 
         static RangeFieldMapper createExtractedRangeFieldBuilder(String name, RangeType rangeType, BuilderContext context) {
-            RangeFieldMapper.Builder builder = new RangeFieldMapper.Builder(name, rangeType, context.indexCreatedVersion());
+            RangeFieldMapper.Builder builder = new RangeFieldMapper.Builder(name, rangeType);
             // For now no doc values, because in processQuery(...) only the Lucene range fields get added:
             builder.docValues(false);
             return builder.build(context);

modules/reindex/src/main/java/org/elasticsearch/index/reindex/RestReindexAction.java

@@ -115,7 +115,7 @@ public class RestReindexAction extends AbstractBaseReindexRestHandler<ReindexReq
     @Override
     protected ReindexRequest buildRequest(RestRequest request) throws IOException {
         if (request.hasParam("pipeline")) {
-            throw new IllegalArgumentException("_reindex doesn't support [pipeline] as a query parmaeter. "
+            throw new IllegalArgumentException("_reindex doesn't support [pipeline] as a query parameter. "
                     + "Specify it in the [dest] object instead.");
         }
         ReindexRequest internal = new ReindexRequest(new SearchRequest(), new IndexRequest());

modules/reindex/src/test/java/org/elasticsearch/index/reindex/RestReindexActionTests.java

@@ -149,7 +149,7 @@ public class RestReindexActionTests extends ESTestCase {
         request.withParams(singletonMap("pipeline", "doesn't matter"));
         Exception e = expectThrows(IllegalArgumentException.class, () -> action.buildRequest(request.build()));
 
-        assertEquals("_reindex doesn't support [pipeline] as a query parmaeter. Specify it in the [dest] object instead.", e.getMessage());
+        assertEquals("_reindex doesn't support [pipeline] as a query parameter. Specify it in the [dest] object instead.", e.getMessage());
     }
 
     public void testSetScrollTimeout() throws IOException {

plugins/repository-s3/src/main/java/org/elasticsearch/repositories/s3/S3RepositoryPlugin.java

@@ -90,6 +90,8 @@ public class S3RepositoryPlugin extends Plugin implements RepositoryPlugin {
             S3ClientSettings.PROXY_PASSWORD_SETTING,
             S3ClientSettings.READ_TIMEOUT_SETTING,
             S3ClientSettings.MAX_RETRIES_SETTING,
-            S3ClientSettings.USE_THROTTLE_RETRIES_SETTING);
+            S3ClientSettings.USE_THROTTLE_RETRIES_SETTING,
+            S3Repository.ACCESS_KEY_SETTING,
+            S3Repository.SECRET_KEY_SETTING);
     }
 }

plugins/repository-s3/src/test/java/org/elasticsearch/repositories/s3/S3BlobStoreRepositoryTests.java

@@ -21,7 +21,10 @@ package org.elasticsearch.repositories.s3;
 import com.amazonaws.services.s3.AmazonS3;
 import com.amazonaws.services.s3.model.CannedAccessControlList;
 import com.amazonaws.services.s3.model.StorageClass;
+
+import org.elasticsearch.client.node.NodeClient;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.settings.SettingsFilter;
 import org.elasticsearch.common.unit.ByteSizeUnit;
 import org.elasticsearch.common.unit.ByteSizeValue;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
@@ -29,6 +32,12 @@ import org.elasticsearch.env.Environment;
 import org.elasticsearch.plugins.Plugin;
 import org.elasticsearch.repositories.Repository;
 import org.elasticsearch.repositories.blobstore.ESBlobStoreRepositoryIntegTestCase;
+import org.elasticsearch.rest.AbstractRestChannel;
+import org.elasticsearch.rest.RestController;
+import org.elasticsearch.rest.RestRequest;
+import org.elasticsearch.rest.RestResponse;
+import org.elasticsearch.rest.action.admin.cluster.RestGetRepositoriesAction;
+import org.elasticsearch.test.rest.FakeRestRequest;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 
@@ -38,9 +47,14 @@ import java.util.Locale;
 import java.util.Map;
 import java.util.concurrent.ConcurrentHashMap;
 import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.CountDownLatch;
+import java.util.concurrent.atomic.AtomicReference;
 
 import static java.util.Collections.emptyMap;
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.not;
+import static org.mockito.Mockito.mock;
 
 public class S3BlobStoreRepositoryTests extends ESBlobStoreRepositoryIntegTestCase {
 
@@ -81,7 +95,9 @@ public class S3BlobStoreRepositoryTests extends ESBlobStoreRepositoryIntegTestCa
                 .put(S3Repository.BUFFER_SIZE_SETTING.getKey(), bufferSize)
                 .put(S3Repository.SERVER_SIDE_ENCRYPTION_SETTING.getKey(), serverSideEncryption)
                 .put(S3Repository.CANNED_ACL_SETTING.getKey(), cannedACL)
-                .put(S3Repository.STORAGE_CLASS_SETTING.getKey(), storageClass)));
+                .put(S3Repository.STORAGE_CLASS_SETTING.getKey(), storageClass)
+                .put(S3Repository.ACCESS_KEY_SETTING.getKey(), "not_used_but_this_is_a_secret")
+                .put(S3Repository.SECRET_KEY_SETTING.getKey(), "not_used_but_this_is_a_secret")));
     }
 
     @Override
@@ -106,4 +122,32 @@ public class S3BlobStoreRepositoryTests extends ESBlobStoreRepositoryIntegTestCa
                 }));
         }
     }
+
+    public void testInsecureRepositoryCredentials() throws Exception {
+        final String repositoryName = "testInsecureRepositoryCredentials";
+        createTestRepository(repositoryName);
+        final NodeClient nodeClient = internalCluster().getInstance(NodeClient.class);
+        final RestGetRepositoriesAction getRepoAction = new RestGetRepositoriesAction(Settings.EMPTY, mock(RestController.class),
+                internalCluster().getInstance(SettingsFilter.class));
+        final RestRequest getRepoRequest = new FakeRestRequest();
+        getRepoRequest.params().put("repository", repositoryName);
+        final CountDownLatch getRepoLatch = new CountDownLatch(1);
+        final AtomicReference<AssertionError> getRepoError = new AtomicReference<>();
+        getRepoAction.handleRequest(getRepoRequest, new AbstractRestChannel(getRepoRequest, true) {
+            @Override
+            public void sendResponse(RestResponse response) {
+                try {
+                    assertThat(response.content().utf8ToString(), not(containsString("not_used_but_this_is_a_secret")));
+                } catch (final AssertionError ex) {
+                    getRepoError.set(ex);
+                }
+                getRepoLatch.countDown();
+            }
+        }, nodeClient);
+        getRepoLatch.await();
+        if (getRepoError.get() != null) {
+            throw getRepoError.get();
+        }
+    }
+
 }

rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/250_moving_fn.yml

@@ -0,0 +1,46 @@
+setup:
+  - skip:
+        version: " - 6.4.0"
+        reason:  "moving_fn added in 6.4.0"
+
+---
+"Bad window":
+
+  - do:
+      catch: /\[window\] must be a positive, non-zero integer\./
+      search:
+        body:
+          size: 0
+          aggs:
+            the_histo:
+              date_histogram:
+                field: "date"
+                interval: "1d"
+              aggs:
+                the_avg:
+                  avg:
+                    field: "value_field"
+                the_mov_fn:
+                  moving_fn:
+                    buckets_path: "the_avg"
+                    window: -1
+                    script: "MovingFunctions.windowMax(values)"
+
+---
+"Not under date_histo":
+
+  - do:
+      catch: /\[window\] must be a positive, non-zero integer\./
+      search:
+        body:
+          size: 0
+          aggs:
+            the_avg:
+              avg:
+                field: "value_field"
+            the_mov_fn:
+              moving_fn:
+                buckets_path: "the_avg"
+                window: -1
+                script: "MovingFunctions.windowMax(values)"
+

rest-api-spec/src/main/resources/rest-api-spec/test/search.aggregation/80_typed_keys.yml

@@ -195,7 +195,13 @@ setup:
 
 ---
 "Test typed keys parameter for date_histogram aggregation and max_bucket pipeline aggregation":
+  - skip:
+      features: warnings
+      version: " - 6.4.0"
+      reason:  "deprecation added in 6.4.0"
   - do:
+      warnings:
+          - 'The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.'
       search:
         typed_keys: true
         body:

server/src/main/java/org/elasticsearch/action/TaskOperationFailure.java

@@ -21,17 +21,20 @@ package org.elasticsearch.action;
 
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.ExceptionsHelper;
+import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.Writeable;
-import org.elasticsearch.common.xcontent.ToXContent.Params;
+import org.elasticsearch.common.xcontent.ConstructingObjectParser;
 import org.elasticsearch.common.xcontent.ToXContentFragment;
 import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.rest.RestStatus;
 
 import java.io.IOException;
 
 import static org.elasticsearch.ExceptionsHelper.detailedMessage;
+import static org.elasticsearch.common.xcontent.ConstructingObjectParser.constructorArg;
 
 /**
  * Information about task operation failures
@@ -39,7 +42,10 @@ import static org.elasticsearch.ExceptionsHelper.detailedMessage;
  * The class is final due to serialization limitations
  */
 public final class TaskOperationFailure implements Writeable, ToXContentFragment {
-
+    private static final String TASK_ID = "task_id";
+    private static final String NODE_ID = "node_id";
+    private static final String STATUS = "status";
+    private static final String REASON = "reason";
     private final String nodeId;
 
     private final long taskId;
@@ -48,6 +54,21 @@ public final class TaskOperationFailure implements Writeable, ToXContentFragment
 
     private final RestStatus status;
 
+    private static final ConstructingObjectParser<TaskOperationFailure, Void> PARSER =
+            new ConstructingObjectParser<>("task_info", true, constructorObjects -> {
+                int i = 0;
+                String nodeId = (String) constructorObjects[i++];
+                long taskId = (long) constructorObjects[i++];
+                ElasticsearchException reason = (ElasticsearchException) constructorObjects[i];
+                return new TaskOperationFailure(nodeId, taskId, reason);
+            });
+
+    static {
+        PARSER.declareString(constructorArg(), new ParseField(NODE_ID));
+        PARSER.declareLong(constructorArg(), new ParseField(TASK_ID));
+        PARSER.declareObject(constructorArg(), (parser, c) -> ElasticsearchException.fromXContent(parser), new ParseField(REASON));
+    }
+
     public TaskOperationFailure(String nodeId, long taskId, Exception e) {
         this.nodeId = nodeId;
         this.taskId = taskId;
@@ -98,13 +119,17 @@ public final class TaskOperationFailure implements Writeable, ToXContentFragment
         return "[" + nodeId + "][" + taskId + "] failed, reason [" + getReason() + "]";
     }
 
+    public static TaskOperationFailure fromXContent(XContentParser parser) {
+        return PARSER.apply(parser, null);
+    }
+
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.field("task_id", getTaskId());
-        builder.field("node_id", getNodeId());
-        builder.field("status", status.name());
+        builder.field(TASK_ID, getTaskId());
+        builder.field(NODE_ID, getNodeId());
+        builder.field(STATUS, status.name());
         if (reason != null) {
-            builder.field("reason");
+            builder.field(REASON);
             builder.startObject();
             ElasticsearchException.generateThrowableXContent(builder, params, reason);
             builder.endObject();
@@ -112,5 +137,4 @@ public final class TaskOperationFailure implements Writeable, ToXContentFragment
         return builder;
 
     }
-
 }

server/src/main/java/org/elasticsearch/action/admin/cluster/node/tasks/list/ListTasksResponse.java

@@ -19,16 +19,19 @@
 
 package org.elasticsearch.action.admin.cluster.node.tasks.list;
 
-import org.elasticsearch.action.FailedNodeException;
+import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.TaskOperationFailure;
 import org.elasticsearch.action.support.tasks.BaseTasksResponse;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
+import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.common.xcontent.ConstructingObjectParser;
 import org.elasticsearch.common.xcontent.ToXContentObject;
 import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.tasks.TaskId;
 import org.elasticsearch.tasks.TaskInfo;
 
@@ -40,10 +43,16 @@ import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
 
+import static org.elasticsearch.common.xcontent.ConstructingObjectParser.constructorArg;
+import static org.elasticsearch.common.xcontent.ConstructingObjectParser.optionalConstructorArg;
+
 /**
  * Returns the list of tasks currently running on the nodes
  */
 public class ListTasksResponse extends BaseTasksResponse implements ToXContentObject {
+    private static final String TASKS = "tasks";
+    private static final String TASK_FAILURES = "task_failures";
+    private static final String NODE_FAILURES = "node_failures";
 
     private List<TaskInfo> tasks;
 
@@ -56,11 +65,31 @@ public class ListTasksResponse extends BaseTasksResponse implements ToXContentOb
     }
 
     public ListTasksResponse(List<TaskInfo> tasks, List<TaskOperationFailure> taskFailures,
-            List<? extends FailedNodeException> nodeFailures) {
+            List<? extends ElasticsearchException> nodeFailures) {
         super(taskFailures, nodeFailures);
         this.tasks = tasks == null ? Collections.emptyList() : Collections.unmodifiableList(new ArrayList<>(tasks));
     }
 
+    private static final ConstructingObjectParser<ListTasksResponse, Void> PARSER =
+        new ConstructingObjectParser<>("list_tasks_response", true,
+            constructingObjects -> {
+                int i = 0;
+                @SuppressWarnings("unchecked")
+                List<TaskInfo> tasks = (List<TaskInfo>) constructingObjects[i++];
+                @SuppressWarnings("unchecked")
+                List<TaskOperationFailure> tasksFailures = (List<TaskOperationFailure>) constructingObjects[i++];
+                @SuppressWarnings("unchecked")
+                List<ElasticsearchException> nodeFailures = (List<ElasticsearchException>) constructingObjects[i];
+                return new ListTasksResponse(tasks, tasksFailures, nodeFailures);
+            });
+
+    static {
+        PARSER.declareObjectArray(constructorArg(), TaskInfo.PARSER, new ParseField(TASKS));
+        PARSER.declareObjectArray(optionalConstructorArg(), (p, c) -> TaskOperationFailure.fromXContent(p), new ParseField(TASK_FAILURES));
+        PARSER.declareObjectArray(optionalConstructorArg(),
+            (parser, c) -> ElasticsearchException.fromXContent(parser), new ParseField(NODE_FAILURES));
+    }
+
     @Override
     public void readFrom(StreamInput in) throws IOException {
         super.readFrom(in);
@@ -159,7 +188,7 @@ public class ListTasksResponse extends BaseTasksResponse implements ToXContentOb
                     builder.endObject();
                 }
             }
-            builder.startObject("tasks");
+            builder.startObject(TASKS);
             for(TaskInfo task : entry.getValue()) {
                 builder.startObject(task.getTaskId().toString());
                 task.toXContent(builder, params);
@@ -177,7 +206,7 @@ public class ListTasksResponse extends BaseTasksResponse implements ToXContentOb
      */
     public XContentBuilder toXContentGroupedByParents(XContentBuilder builder, Params params) throws IOException {
         toXContentCommon(builder, params);
-        builder.startObject("tasks");
+        builder.startObject(TASKS);
         for (TaskGroup group : getTaskGroups()) {
             builder.field(group.getTaskInfo().getTaskId().toString());
             group.toXContent(builder, params);
@@ -191,7 +220,7 @@ public class ListTasksResponse extends BaseTasksResponse implements ToXContentOb
      */
     public XContentBuilder toXContentGroupedByNone(XContentBuilder builder, Params params) throws IOException {
         toXContentCommon(builder, params);
-        builder.startArray("tasks");
+        builder.startArray(TASKS);
         for (TaskInfo taskInfo : getTasks()) {
             builder.startObject();
             taskInfo.toXContent(builder, params);
@@ -204,14 +233,14 @@ public class ListTasksResponse extends BaseTasksResponse implements ToXContentOb
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
         builder.startObject();
-        toXContentGroupedByParents(builder, params);
+        toXContentGroupedByNone(builder, params);
         builder.endObject();
         return builder;
     }
 
     private void toXContentCommon(XContentBuilder builder, Params params) throws IOException {
         if (getTaskFailures() != null && getTaskFailures().size() > 0) {
-            builder.startArray("task_failures");
+            builder.startArray(TASK_FAILURES);
             for (TaskOperationFailure ex : getTaskFailures()){
                 builder.startObject();
                 builder.value(ex);
@@ -221,8 +250,8 @@ public class ListTasksResponse extends BaseTasksResponse implements ToXContentOb
         }
 
         if (getNodeFailures() != null && getNodeFailures().size() > 0) {
-            builder.startArray("node_failures");
-            for (FailedNodeException ex : getNodeFailures()) {
+            builder.startArray(NODE_FAILURES);
+            for (ElasticsearchException ex : getNodeFailures()) {
                 builder.startObject();
                 ex.toXContent(builder, params);
                 builder.endObject();
@@ -231,6 +260,10 @@ public class ListTasksResponse extends BaseTasksResponse implements ToXContentOb
         }
     }
 
+    public static ListTasksResponse fromXContent(XContentParser parser) {
+        return PARSER.apply(parser, null);
+    }
+
     @Override
     public String toString() {
         return Strings.toString(this);

server/src/main/java/org/elasticsearch/action/support/IndicesOptions.java

@@ -239,7 +239,7 @@ public class IndicesOptions {
     }
 
     public void writeIndicesOptions(StreamOutput out) throws IOException {
-        if (out.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+        if (out.getVersion().onOrAfter(Version.V_6_4_0)) {
             out.writeEnumSet(options);
             out.writeEnumSet(expandWildcards);
         } else {
@@ -248,7 +248,7 @@ public class IndicesOptions {
     }
 
     public static IndicesOptions readIndicesOptions(StreamInput in) throws IOException {
-        if (in.getVersion().onOrAfter(Version.V_7_0_0_alpha1)) {
+        if (in.getVersion().onOrAfter(Version.V_6_4_0)) {
             return new IndicesOptions(in.readEnumSet(Option.class), in.readEnumSet(WildcardStates.class));
         } else {
             byte id = in.readByte();

server/src/main/java/org/elasticsearch/action/support/tasks/BaseTasksResponse.java

@@ -42,9 +42,9 @@ import static org.elasticsearch.ExceptionsHelper.rethrowAndSuppress;
  */
 public class BaseTasksResponse extends ActionResponse {
     private List<TaskOperationFailure> taskFailures;
-    private List<FailedNodeException> nodeFailures;
+    private List<ElasticsearchException> nodeFailures;
 
-    public BaseTasksResponse(List<TaskOperationFailure> taskFailures, List<? extends FailedNodeException> nodeFailures) {
+    public BaseTasksResponse(List<TaskOperationFailure> taskFailures, List<? extends ElasticsearchException> nodeFailures) {
         this.taskFailures = taskFailures == null ? Collections.emptyList() : Collections.unmodifiableList(new ArrayList<>(taskFailures));
         this.nodeFailures = nodeFailures == null ? Collections.emptyList() : Collections.unmodifiableList(new ArrayList<>(nodeFailures));
     }
@@ -59,7 +59,7 @@ public class BaseTasksResponse extends ActionResponse {
     /**
      * The list of node failures exception.
      */
-    public List<FailedNodeException> getNodeFailures() {
+    public List<ElasticsearchException> getNodeFailures() {
         return nodeFailures;
     }
 
@@ -99,7 +99,7 @@ public class BaseTasksResponse extends ActionResponse {
             exp.writeTo(out);
         }
         out.writeVInt(nodeFailures.size());
-        for (FailedNodeException exp : nodeFailures) {
+        for (ElasticsearchException exp : nodeFailures) {
             exp.writeTo(out);
         }
     }

server/src/main/java/org/elasticsearch/cluster/metadata/TemplateUpgradeService.java

@@ -41,6 +41,7 @@ import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.common.util.concurrent.ThreadContext;
 import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.common.xcontent.XContentHelper;
 import org.elasticsearch.common.xcontent.XContentType;
@@ -128,12 +129,21 @@ public class TemplateUpgradeService extends AbstractComponent implements Cluster
                     Version.CURRENT,
                     changes.get().v1().size(),
                     changes.get().v2().size());
-                threadPool.generic().execute(() -> updateTemplates(changes.get().v1(), changes.get().v2()));
+
+                final ThreadContext threadContext = threadPool.getThreadContext();
+                try (ThreadContext.StoredContext ignore = threadContext.stashContext()) {
+                    threadContext.markAsSystemContext();
+                    threadPool.generic().execute(() -> updateTemplates(changes.get().v1(), changes.get().v2()));
+                }
             }
         }
     }
 
     void updateTemplates(Map<String, BytesReference> changes, Set<String> deletions) {
+        if (threadPool.getThreadContext().isSystemContext() == false) {
+            throw new IllegalStateException("template updates from the template upgrade service should always happen in a system context");
+        }
+
         for (Map.Entry<String, BytesReference> change : changes.entrySet()) {
             PutIndexTemplateRequest request =
                 new PutIndexTemplateRequest(change.getKey()).source(change.getValue(), XContentType.JSON);
@@ -141,7 +151,7 @@ public class TemplateUpgradeService extends AbstractComponent implements Cluster
             client.admin().indices().putTemplate(request, new ActionListener<PutIndexTemplateResponse>() {
                 @Override
                 public void onResponse(PutIndexTemplateResponse response) {
-                    if(updatesInProgress.decrementAndGet() == 0) {
+                    if (updatesInProgress.decrementAndGet() == 0) {
                         logger.info("Finished upgrading templates to version {}", Version.CURRENT);
                     }
                     if (response.isAcknowledged() == false) {
@@ -151,7 +161,7 @@ public class TemplateUpgradeService extends AbstractComponent implements Cluster
 
                 @Override
                 public void onFailure(Exception e) {
-                    if(updatesInProgress.decrementAndGet() == 0) {
+                    if (updatesInProgress.decrementAndGet() == 0) {
                         logger.info("Templates were upgraded to version {}", Version.CURRENT);
                     }
                     logger.warn(new ParameterizedMessage("Error updating template [{}]", change.getKey()), e);

server/src/main/java/org/elasticsearch/index/mapper/RangeFieldMapper.java

@@ -40,7 +40,6 @@ import org.apache.lucene.search.TermQuery;
 import org.apache.lucene.store.ByteArrayDataOutput;
 import org.apache.lucene.util.BytesRef;
 import org.elasticsearch.ElasticsearchException;
-import org.elasticsearch.Version;
 import org.elasticsearch.common.Explicit;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.collect.Tuple;
@@ -93,8 +92,8 @@ public class RangeFieldMapper extends FieldMapper {
         private Boolean coerce;
         private Locale locale;
 
-        public Builder(String name, RangeType type, Version indexVersionCreated) {
-            super(name, new RangeFieldType(type, indexVersionCreated), new RangeFieldType(type, indexVersionCreated));
+        public Builder(String name, RangeType type) {
+            super(name, new RangeFieldType(type), new RangeFieldType(type));
             builder = this;
             locale = Locale.ROOT;
         }
@@ -174,7 +173,7 @@ public class RangeFieldMapper extends FieldMapper {
         @Override
         public Mapper.Builder<?,?> parse(String name, Map<String, Object> node,
                                          ParserContext parserContext) throws MapperParsingException {
-            Builder builder = new Builder(name, type, parserContext.indexVersionCreated());
+            Builder builder = new Builder(name, type);
             TypeParsers.parseField(builder, name, node, parserContext);
             for (Iterator<Map.Entry<String, Object>> iterator = node.entrySet().iterator(); iterator.hasNext();) {
                 Map.Entry<String, Object> entry = iterator.next();
@@ -205,7 +204,7 @@ public class RangeFieldMapper extends FieldMapper {
         protected FormatDateTimeFormatter dateTimeFormatter;
         protected DateMathParser dateMathParser;
 
-        RangeFieldType(RangeType type, Version indexVersionCreated) {
+        RangeFieldType(RangeType type) {
             super();
             this.rangeType = Objects.requireNonNull(type);
             setTokenized(false);

server/src/main/java/org/elasticsearch/index/store/DirectoryUtils.java

@@ -1,83 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-
-package org.elasticsearch.index.store;
-
-import org.apache.lucene.store.Directory;
-import org.apache.lucene.store.FileSwitchDirectory;
-import org.apache.lucene.store.FilterDirectory;
-
-/**
- * Utils for working with {@link Directory} classes.
- */
-public final class DirectoryUtils {
-
-    private DirectoryUtils() {} // no instance
-
-    static <T extends Directory> Directory getLeafDirectory(FilterDirectory dir, Class<T> targetClass) {
-        Directory current = dir.getDelegate();
-        while (true) {
-            if ((current instanceof FilterDirectory)) {
-                if (targetClass != null && targetClass.isAssignableFrom(current.getClass())) {
-                    break;
-                }
-                current = ((FilterDirectory) current).getDelegate();
-            } else {
-                break;
-            }
-        }
-        return current;
-    }
-
-    /**
-     * Tries to extract the leaf of the {@link Directory} if the directory is a {@link FilterDirectory} and cast
-     * it to the given target class or returns <code>null</code> if the leaf is not assignable to the target class.
-     * If the given {@link Directory} is a concrete directory it will treated as a leaf and the above applies.
-     */
-    public static <T extends Directory> T getLeaf(Directory dir, Class<T> targetClass) {
-        return getLeaf(dir, targetClass, null);
-    }
-    /**
-     * Tries to extract the leaf of the {@link Directory} if the directory is a {@link FilterDirectory} and cast
-     * it to the given target class or returns the given default value, if the leaf is not assignable to the target class.
-     * If the given {@link Directory} is a concrete directory it will treated as a leaf and the above applies.
-     */
-    public static <T extends Directory> T getLeaf(Directory dir, Class<T> targetClass, T defaultValue) {
-        Directory d = dir;
-        if (dir instanceof FilterDirectory) {
-            d = getLeafDirectory((FilterDirectory) dir, targetClass);
-        }
-        if (d instanceof FileSwitchDirectory) {
-            T leaf = getLeaf(((FileSwitchDirectory) d).getPrimaryDir(), targetClass);
-            if (leaf == null) {
-                d = getLeaf(((FileSwitchDirectory) d).getSecondaryDir(), targetClass, defaultValue);
-            } else {
-                d = leaf;
-            }
-        }
-
-        if (d != null && targetClass.isAssignableFrom(d.getClass())) {
-            return targetClass.cast(d);
-        } else {
-            return defaultValue;
-        }
-    }
-
-
-}

server/src/main/java/org/elasticsearch/rest/action/admin/cluster/RestListTasksAction.java

@@ -103,18 +103,17 @@ public class RestListTasksAction extends BaseRestHandler {
                     return new BytesRestResponse(RestStatus.OK, builder);
                 }
             };
-        } else if ("none".equals(groupBy)) {
+        } else if ("parents".equals(groupBy)) {
             return new RestBuilderListener<T>(channel) {
                 @Override
                 public RestResponse buildResponse(T response, XContentBuilder builder) throws Exception {
                     builder.startObject();
-                    response.toXContentGroupedByNone(builder, channel.request());
+                    response.toXContentGroupedByParents(builder, channel.request());
                     builder.endObject();
                     return new BytesRestResponse(RestStatus.OK, builder);
                 }
             };
-
-        } else if ("parents".equals(groupBy)) {
+        } else if ("none".equals(groupBy)) {
             return new RestToXContentListener<>(channel);
         } else {
             throw new IllegalArgumentException("[group_by] must be one of [nodes], [parents] or [none] but was [" + groupBy + "]");

server/src/main/java/org/elasticsearch/script/ScriptModule.java

@@ -30,6 +30,7 @@ import java.util.stream.Stream;
 import org.elasticsearch.common.settings.ClusterSettings;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.plugins.ScriptPlugin;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctionScript;
 
 /**
  * Manages building {@link ScriptService}.
@@ -48,7 +49,8 @@ public class ScriptModule {
             FilterScript.CONTEXT,
             SimilarityScript.CONTEXT,
             SimilarityWeightScript.CONTEXT,
-            TemplateScript.CONTEXT
+            TemplateScript.CONTEXT,
+            MovingFunctionScript.CONTEXT
         ).collect(Collectors.toMap(c -> c.name, Function.identity()));
     }
 

server/src/main/java/org/elasticsearch/search/SearchModule.java

@@ -220,6 +220,8 @@ import org.elasticsearch.search.aggregations.pipeline.movavg.models.HoltWintersM
 import org.elasticsearch.search.aggregations.pipeline.movavg.models.LinearModel;
 import org.elasticsearch.search.aggregations.pipeline.movavg.models.MovAvgModel;
 import org.elasticsearch.search.aggregations.pipeline.movavg.models.SimpleModel;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovFnPipelineAggregationBuilder;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovFnPipelineAggregator;
 import org.elasticsearch.search.aggregations.pipeline.serialdiff.SerialDiffPipelineAggregationBuilder;
 import org.elasticsearch.search.aggregations.pipeline.serialdiff.SerialDiffPipelineAggregator;
 import org.elasticsearch.search.fetch.FetchPhase;
@@ -514,6 +516,11 @@ public class SearchModule {
                 SerialDiffPipelineAggregationBuilder::new,
                 SerialDiffPipelineAggregator::new,
                 SerialDiffPipelineAggregationBuilder::parse));
+        registerPipelineAggregation(new PipelineAggregationSpec(
+            MovFnPipelineAggregationBuilder.NAME,
+            MovFnPipelineAggregationBuilder::new,
+            MovFnPipelineAggregator::new,
+            MovFnPipelineAggregationBuilder::parse));
 
         registerFromPlugin(plugins, SearchPlugin::getPipelineAggregations, this::registerPipelineAggregation);
     }

server/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/DateHistogramAggregationBuilder.java

@@ -19,6 +19,10 @@
 
 package org.elasticsearch.search.aggregations.bucket.histogram;
 
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.LeafReaderContext;
+import org.apache.lucene.index.SortedNumericDocValues;
+import org.apache.lucene.search.DocIdSetIterator;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.rounding.DateTimeUnit;
@@ -27,8 +31,13 @@ import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.ObjectParser;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.index.fielddata.AtomicNumericFieldData;
+import org.elasticsearch.index.fielddata.IndexNumericFieldData;
+import org.elasticsearch.index.mapper.MappedFieldType;
+import org.elasticsearch.index.mapper.MappedFieldType.Relation;
+import org.elasticsearch.index.query.QueryShardContext;
+import org.elasticsearch.search.DocValueFormat;
 import org.elasticsearch.search.aggregations.AggregationBuilder;
-import org.elasticsearch.search.aggregations.AggregatorFactories;
 import org.elasticsearch.search.aggregations.AggregatorFactories.Builder;
 import org.elasticsearch.search.aggregations.AggregatorFactory;
 import org.elasticsearch.search.aggregations.BucketOrder;
@@ -44,6 +53,8 @@ import org.elasticsearch.search.aggregations.support.ValuesSourceConfig;
 import org.elasticsearch.search.aggregations.support.ValuesSourceParserHelper;
 import org.elasticsearch.search.aggregations.support.ValuesSourceType;
 import org.elasticsearch.search.internal.SearchContext;
+import org.joda.time.DateTimeField;
+import org.joda.time.DateTimeZone;
 
 import java.io.IOException;
 import java.util.HashMap;
@@ -351,36 +362,121 @@ public class DateHistogramAggregationBuilder extends ValuesSourceAggregationBuil
         return NAME;
     }
 
+    /*
+     * NOTE: this can't be done in rewrite() because the timezone is then also used on the
+     * coordinating node in order to generate missing buckets, which may cross a transition
+     * even though data on the shards doesn't.
+     */
+    DateTimeZone rewriteTimeZone(QueryShardContext context) throws IOException {
+        final DateTimeZone tz = timeZone();
+        if (field() != null &&
+                tz != null &&
+                tz.isFixed() == false &&
+                field() != null &&
+                script() == null) {
+            final MappedFieldType ft = context.fieldMapper(field());
+            final IndexReader reader = context.getIndexReader();
+            if (ft != null && reader != null) {
+                Long anyInstant = null;
+                final IndexNumericFieldData fieldData = context.getForField(ft);
+                for (LeafReaderContext ctx : reader.leaves()) {
+                    AtomicNumericFieldData leafFD = ((IndexNumericFieldData) fieldData).load(ctx);
+                    SortedNumericDocValues values = leafFD.getLongValues();
+                    if (values.nextDoc() != DocIdSetIterator.NO_MORE_DOCS) {
+                        anyInstant = values.nextValue();
+                        break;
+                    }
+                }
+
+                if (anyInstant != null) {
+                    final long prevTransition = tz.previousTransition(anyInstant);
+                    final long nextTransition = tz.nextTransition(anyInstant);
+
+                    // We need all not only values but also rounded values to be within
+                    // [prevTransition, nextTransition].
+                    final long low;
+                    DateTimeUnit intervalAsUnit = getIntervalAsDateTimeUnit();
+                    if (intervalAsUnit != null) {
+                        final DateTimeField dateTimeField = intervalAsUnit.field(tz);
+                        low = dateTimeField.roundCeiling(prevTransition);
+                    } else {
+                        final TimeValue intervalAsMillis = getIntervalAsTimeValue();
+                        low = Math.addExact(prevTransition, intervalAsMillis.millis());
+                    }
+                    // rounding rounds down, so 'nextTransition' is a good upper bound
+                    final long high = nextTransition;
+
+                    final DocValueFormat format = ft.docValueFormat(null, null);
+                    final String formattedLow = format.format(low);
+                    final String formattedHigh = format.format(high);
+                    if (ft.isFieldWithinQuery(reader, formattedLow, formattedHigh,
+                            true, false, tz, null, context) == Relation.WITHIN) {
+                        // All values in this reader have the same offset despite daylight saving times.
+                        // This is very common for location-based timezones such as Europe/Paris in
+                        // combination with time-based indices.
+                        return DateTimeZone.forOffsetMillis(tz.getOffset(anyInstant));
+                    }
+                }
+            }
+        }
+        return tz;
+    }
+
     @Override
     protected ValuesSourceAggregatorFactory<Numeric, ?> innerBuild(SearchContext context, ValuesSourceConfig<Numeric> config,
             AggregatorFactory<?> parent, Builder subFactoriesBuilder) throws IOException {
-        Rounding rounding = createRounding();
+        final DateTimeZone tz = timeZone();
+        final Rounding rounding = createRounding(tz);
+        final DateTimeZone rewrittenTimeZone = rewriteTimeZone(context.getQueryShardContext());
+        final Rounding shardRounding;
+        if (tz == rewrittenTimeZone) {
+            shardRounding = rounding;
+        } else {
+            shardRounding = createRounding(rewrittenTimeZone);
+        }
+
         ExtendedBounds roundedBounds = null;
         if (this.extendedBounds != null) {
             // parse any string bounds to longs and round
             roundedBounds = this.extendedBounds.parseAndValidate(name, context, config.format()).round(rounding);
         }
-        return new DateHistogramAggregatorFactory(name, config, interval, dateHistogramInterval, offset, order, keyed, minDocCount,
-                rounding, roundedBounds, context, parent, subFactoriesBuilder, metaData);
+        return new DateHistogramAggregatorFactory(name, config, offset, order, keyed, minDocCount,
+                rounding, shardRounding, roundedBounds, context, parent, subFactoriesBuilder, metaData);
     }
 
-    private Rounding createRounding() {
-        Rounding.Builder tzRoundingBuilder;
+    /** Return the interval as a date time unit if applicable. If this returns
+     *  {@code null} then it means that the interval is expressed as a fixed
+     *  {@link TimeValue} and may be accessed via
+     *  {@link #getIntervalAsTimeValue()}. */
+    private DateTimeUnit getIntervalAsDateTimeUnit() {
         if (dateHistogramInterval != null) {
-            DateTimeUnit dateTimeUnit = DATE_FIELD_UNITS.get(dateHistogramInterval.toString());
-            if (dateTimeUnit != null) {
-                tzRoundingBuilder = Rounding.builder(dateTimeUnit);
-            } else {
-                // the interval is a time value?
-                tzRoundingBuilder = Rounding.builder(
-                        TimeValue.parseTimeValue(dateHistogramInterval.toString(), null, getClass().getSimpleName() + ".interval"));
-            }
-        } else {
-            // the interval is an integer time value in millis?
-            tzRoundingBuilder = Rounding.builder(TimeValue.timeValueMillis(interval));
+            return DATE_FIELD_UNITS.get(dateHistogramInterval.toString());
         }
-        if (timeZone() != null) {
-            tzRoundingBuilder.timeZone(timeZone());
+        return null;
+    }
+
+    /**
+     * Get the interval as a {@link TimeValue}. Should only be called if
+     * {@link #getIntervalAsDateTimeUnit()} returned {@code null}.
+     */
+    private TimeValue getIntervalAsTimeValue() {
+        if (dateHistogramInterval != null) {
+            return TimeValue.parseTimeValue(dateHistogramInterval.toString(), null, getClass().getSimpleName() + ".interval");
+        } else {
+            return TimeValue.timeValueMillis(interval);
+        }
+    }
+
+    private Rounding createRounding(DateTimeZone timeZone) {
+        Rounding.Builder tzRoundingBuilder;
+        DateTimeUnit intervalAsUnit = getIntervalAsDateTimeUnit();
+        if (intervalAsUnit != null) {
+            tzRoundingBuilder = Rounding.builder(intervalAsUnit);
+        } else {
+            tzRoundingBuilder = Rounding.builder(getIntervalAsTimeValue());
+        }
+        if (timeZone != null) {
+            tzRoundingBuilder.timeZone(timeZone);
         }
         Rounding rounding = tzRoundingBuilder.build();
         return rounding;

server/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/DateHistogramAggregator.java

@@ -55,6 +55,7 @@ class DateHistogramAggregator extends BucketsAggregator {
     private final ValuesSource.Numeric valuesSource;
     private final DocValueFormat formatter;
     private final Rounding rounding;
+    private final Rounding shardRounding;
     private final BucketOrder order;
     private final boolean keyed;
 
@@ -64,14 +65,15 @@ class DateHistogramAggregator extends BucketsAggregator {
     private final LongHash bucketOrds;
     private long offset;
 
-    DateHistogramAggregator(String name, AggregatorFactories factories, Rounding rounding, long offset, BucketOrder order,
-            boolean keyed,
+    DateHistogramAggregator(String name, AggregatorFactories factories, Rounding rounding, Rounding shardRounding,
+            long offset, BucketOrder order, boolean keyed,
             long minDocCount, @Nullable ExtendedBounds extendedBounds, @Nullable ValuesSource.Numeric valuesSource,
             DocValueFormat formatter, SearchContext aggregationContext,
             Aggregator parent, List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) throws IOException {
 
         super(name, factories, aggregationContext, parent, pipelineAggregators, metaData);
         this.rounding = rounding;
+        this.shardRounding = shardRounding;
         this.offset = offset;
         this.order = InternalOrder.validate(order, this);;
         this.keyed = keyed;
@@ -105,7 +107,9 @@ class DateHistogramAggregator extends BucketsAggregator {
                     long previousRounded = Long.MIN_VALUE;
                     for (int i = 0; i < valuesCount; ++i) {
                         long value = values.nextValue();
-                        long rounded = rounding.round(value - offset) + offset;
+                        // We can use shardRounding here, which is sometimes more efficient
+                        // if daylight saving times are involved.
+                        long rounded = shardRounding.round(value - offset) + offset;
                         assert rounded >= previousRounded;
                         if (rounded == previousRounded) {
                             continue;
@@ -138,6 +142,7 @@ class DateHistogramAggregator extends BucketsAggregator {
         CollectionUtil.introSort(buckets, BucketOrder.key(true).comparator(this));
 
         // value source will be null for unmapped fields
+        // Important: use `rounding` here, not `shardRounding`
         InternalDateHistogram.EmptyBucketInfo emptyBucketInfo = minDocCount == 0
                 ? new InternalDateHistogram.EmptyBucketInfo(rounding, buildEmptySubAggregations(), extendedBounds)
                 : null;

server/src/main/java/org/elasticsearch/search/aggregations/bucket/histogram/DateHistogramAggregatorFactory.java

@@ -38,28 +38,27 @@ import java.util.Map;
 public final class DateHistogramAggregatorFactory
         extends ValuesSourceAggregatorFactory<ValuesSource.Numeric, DateHistogramAggregatorFactory> {
 
-    private final DateHistogramInterval dateHistogramInterval;
-    private final long interval;
     private final long offset;
     private final BucketOrder order;
     private final boolean keyed;
     private final long minDocCount;
     private final ExtendedBounds extendedBounds;
-    private Rounding rounding;
+    private final Rounding rounding;
+    private final Rounding shardRounding;
 
-    public DateHistogramAggregatorFactory(String name, ValuesSourceConfig<Numeric> config, long interval,
-            DateHistogramInterval dateHistogramInterval, long offset, BucketOrder order, boolean keyed, long minDocCount,
-            Rounding rounding, ExtendedBounds extendedBounds, SearchContext context, AggregatorFactory<?> parent,
-            AggregatorFactories.Builder subFactoriesBuilder, Map<String, Object> metaData) throws IOException {
+    public DateHistogramAggregatorFactory(String name, ValuesSourceConfig<Numeric> config,
+            long offset, BucketOrder order, boolean keyed, long minDocCount,
+            Rounding rounding, Rounding shardRounding, ExtendedBounds extendedBounds, SearchContext context,
+            AggregatorFactory<?> parent, AggregatorFactories.Builder subFactoriesBuilder,
+            Map<String, Object> metaData) throws IOException {
         super(name, config, context, parent, subFactoriesBuilder, metaData);
-        this.interval = interval;
-        this.dateHistogramInterval = dateHistogramInterval;
         this.offset = offset;
         this.order = order;
         this.keyed = keyed;
         this.minDocCount = minDocCount;
         this.extendedBounds = extendedBounds;
         this.rounding = rounding;
+        this.shardRounding = shardRounding;
     }
 
     public long minDocCount() {
@@ -77,8 +76,8 @@ public final class DateHistogramAggregatorFactory
 
     private Aggregator createAggregator(ValuesSource.Numeric valuesSource, Aggregator parent, List<PipelineAggregator> pipelineAggregators,
             Map<String, Object> metaData) throws IOException {
-        return new DateHistogramAggregator(name, factories, rounding, offset, order, keyed, minDocCount, extendedBounds, valuesSource,
-                config.format(), context, parent, pipelineAggregators, metaData);
+        return new DateHistogramAggregator(name, factories, rounding, shardRounding, offset, order, keyed, minDocCount, extendedBounds,
+                valuesSource, config.format(), context, parent, pipelineAggregators, metaData);
     }
 
     @Override

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/PipelineAggregatorBuilders.java

@@ -33,6 +33,7 @@ import org.elasticsearch.search.aggregations.pipeline.bucketsort.BucketSortPipel
 import org.elasticsearch.search.aggregations.pipeline.cumulativesum.CumulativeSumPipelineAggregationBuilder;
 import org.elasticsearch.search.aggregations.pipeline.derivative.DerivativePipelineAggregationBuilder;
 import org.elasticsearch.search.aggregations.pipeline.movavg.MovAvgPipelineAggregationBuilder;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovFnPipelineAggregationBuilder;
 import org.elasticsearch.search.aggregations.pipeline.serialdiff.SerialDiffPipelineAggregationBuilder;
 import org.elasticsearch.search.sort.FieldSortBuilder;
 
@@ -78,6 +79,10 @@ public final class PipelineAggregatorBuilders {
         return new PercentilesBucketPipelineAggregationBuilder(name, bucketsPath);
     }
 
+    /**
+     * @deprecated use {@link #movingFunction(String, Script, String, int)} instead
+     */
+    @Deprecated
     public static MovAvgPipelineAggregationBuilder movingAvg(String name, String bucketsPath) {
         return new MovAvgPipelineAggregationBuilder(name, bucketsPath);
     }
@@ -114,4 +119,9 @@ public final class PipelineAggregatorBuilders {
     public static SerialDiffPipelineAggregationBuilder diff(String name, String bucketsPath) {
         return new SerialDiffPipelineAggregationBuilder(name, bucketsPath);
     }
+
+    public static MovFnPipelineAggregationBuilder movingFunction(String name, Script script,
+                                                                 String bucketsPaths, int window) {
+        return new MovFnPipelineAggregationBuilder(name, bucketsPaths, script, window);
+    }
 }

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/bucketmetrics/BucketMetricsPipelineAggregator.java

@@ -79,11 +79,11 @@ public abstract class BucketMetricsPipelineAggregator extends SiblingPipelineAgg
         List<String> bucketsPath = AggregationPath.parse(bucketsPaths()[0]).getPathElementsAsStringList();
         for (Aggregation aggregation : aggregations) {
             if (aggregation.getName().equals(bucketsPath.get(0))) {
-                bucketsPath = bucketsPath.subList(1, bucketsPath.size());
+                List<String> sublistedPath = bucketsPath.subList(1, bucketsPath.size());
                 InternalMultiBucketAggregation<?, ?> multiBucketsAgg = (InternalMultiBucketAggregation<?, ?>) aggregation;
                 List<? extends InternalMultiBucketAggregation.InternalBucket> buckets = multiBucketsAgg.getBuckets();
                 for (InternalMultiBucketAggregation.InternalBucket bucket : buckets) {
-                    Double bucketValue = BucketHelpers.resolveBucketValue(multiBucketsAgg, bucket, bucketsPath, gapPolicy);
+                    Double bucketValue = BucketHelpers.resolveBucketValue(multiBucketsAgg, bucket, sublistedPath, gapPolicy);
                     if (bucketValue != null && !Double.isNaN(bucketValue)) {
                         collectBucketValue(bucket.getKeyAsString(), bucketValue);
                     }

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movavg/MovAvgPipelineAggregationBuilder.java

@@ -23,6 +23,8 @@ import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.ParsingException;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.common.logging.DeprecationLogger;
+import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.common.xcontent.LoggingDeprecationHandler;
 import org.elasticsearch.common.xcontent.ParseFieldRegistry;
 import org.elasticsearch.common.xcontent.XContentBuilder;
@@ -59,6 +61,8 @@ public class MovAvgPipelineAggregationBuilder extends AbstractPipelineAggregatio
     public static final ParseField SETTINGS = new ParseField("settings");
     private static final ParseField PREDICT = new ParseField("predict");
     private static final ParseField MINIMIZE = new ParseField("minimize");
+    private static final DeprecationLogger DEPRECATION_LOGGER
+        = new DeprecationLogger(Loggers.getLogger(MovAvgPipelineAggregationBuilder.class));
 
     private String format;
     private GapPolicy gapPolicy = GapPolicy.SKIP;
@@ -318,6 +322,8 @@ public class MovAvgPipelineAggregationBuilder extends AbstractPipelineAggregatio
         Integer predict = null;
         Boolean minimize = null;
 
+        DEPRECATION_LOGGER.deprecated("The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.");
+
         while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
             if (token == XContentParser.Token.FIELD_NAME) {
                 currentFieldName = parser.currentName();

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movavg/models/EwmaModel.java

@@ -24,6 +24,7 @@ import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.search.aggregations.pipeline.movavg.MovAvgPipelineAggregationBuilder;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctions;
 
 import java.io.IOException;
 import java.text.ParseException;
@@ -90,7 +91,7 @@ public class EwmaModel extends MovAvgModel {
     }
 
     @Override
-    protected <T extends Number> double[] doPredict(Collection<T> values, int numPredictions) {
+    protected double[] doPredict(Collection<Double> values, int numPredictions) {
         double[] predictions = new double[numPredictions];
 
         // EWMA just emits the same final prediction repeatedly.
@@ -100,19 +101,8 @@ public class EwmaModel extends MovAvgModel {
     }
 
     @Override
-    public <T extends Number> double next(Collection<T> values) {
-        double avg = 0;
-        boolean first = true;
-
-        for (T v : values) {
-            if (first) {
-                avg = v.doubleValue();
-                first = false;
-            } else {
-                avg = (v.doubleValue() * alpha) + (avg * (1 - alpha));
-            }
-        }
-        return avg;
+    public double next(Collection<Double> values) {
+        return MovingFunctions.ewma(values.stream().mapToDouble(Double::doubleValue).toArray(), alpha);
     }
 
     @Override

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movavg/models/HoltLinearModel.java

@@ -24,6 +24,7 @@ import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.search.aggregations.pipeline.movavg.MovAvgPipelineAggregationBuilder;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctions;
 
 import java.io.IOException;
 import java.text.ParseException;
@@ -116,16 +117,15 @@ public class HoltLinearModel extends MovAvgModel {
      *
      * @param values            Collection of numerics to movingAvg, usually windowed
      * @param numPredictions    Number of newly generated predictions to return
-     * @param <T>               Type of numeric
      * @return                  Returns an array of doubles, since most smoothing methods operate on floating points
      */
     @Override
-    protected <T extends Number> double[] doPredict(Collection<T> values, int numPredictions) {
+    protected double[] doPredict(Collection<Double> values, int numPredictions) {
         return next(values, numPredictions);
     }
 
     @Override
-    public <T extends Number> double next(Collection<T> values) {
+    public double next(Collection<Double> values) {
         return next(values, 1)[0];
     }
 
@@ -135,47 +135,13 @@ public class HoltLinearModel extends MovAvgModel {
      * @param values Collection of values to calculate avg for
      * @param numForecasts number of forecasts into the future to return
      *
-     * @param <T>    Type T extending Number
      * @return       Returns a Double containing the moving avg for the window
      */
-    public <T extends Number> double[] next(Collection<T> values, int numForecasts) {
-
+    public double[] next(Collection<Double> values, int numForecasts) {
         if (values.size() == 0) {
             return emptyPredictions(numForecasts);
         }
-
-        // Smoothed value
-        double s = 0;
-        double last_s = 0;
-
-        // Trend value
-        double b = 0;
-        double last_b = 0;
-
-        int counter = 0;
-
-        T last;
-        for (T v : values) {
-            last = v;
-            if (counter == 1) {
-                s = v.doubleValue();
-                b = v.doubleValue() - last.doubleValue();
-            } else {
-                s = alpha * v.doubleValue() + (1.0d - alpha) * (last_s + last_b);
-                b = beta * (s - last_s) + (1 - beta) * last_b;
-            }
-
-            counter += 1;
-            last_s = s;
-            last_b = b;
-        }
-
-        double[] forecastValues = new double[numForecasts];
-        for (int i = 0; i < numForecasts; i++) {
-            forecastValues[i] = s + (i * b);
-        }
-
-        return forecastValues;
+        return MovingFunctions.holtForecast(values.stream().mapToDouble(Double::doubleValue).toArray(), alpha, beta, numForecasts);
     }
 
     @Override

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movavg/models/HoltWintersModel.java

@@ -29,6 +29,7 @@ import org.elasticsearch.common.xcontent.LoggingDeprecationHandler;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.search.aggregations.AggregationExecutionException;
 import org.elasticsearch.search.aggregations.pipeline.movavg.MovAvgPipelineAggregationBuilder;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctions;
 
 import java.io.IOException;
 import java.text.ParseException;
@@ -259,16 +260,15 @@ public class HoltWintersModel extends MovAvgModel {
      *
      * @param values            Collection of numerics to movingAvg, usually windowed
      * @param numPredictions    Number of newly generated predictions to return
-     * @param <T>               Type of numeric
      * @return                  Returns an array of doubles, since most smoothing methods operate on floating points
      */
     @Override
-    protected <T extends Number> double[] doPredict(Collection<T> values, int numPredictions) {
+    protected double[] doPredict(Collection<Double> values, int numPredictions) {
         return next(values, numPredictions);
     }
 
     @Override
-    public <T extends Number> double next(Collection<T> values) {
+    public double next(Collection<Double> values) {
         return next(values, 1)[0];
     }
 
@@ -278,88 +278,11 @@ public class HoltWintersModel extends MovAvgModel {
      * @param values Collection of values to calculate avg for
      * @param numForecasts number of forecasts into the future to return
      *
-     * @param <T>    Type T extending Number
      * @return       Returns a Double containing the moving avg for the window
      */
-    public <T extends Number> double[] next(Collection<T> values, int numForecasts) {
-
-        if (values.size() < period * 2) {
-            // We need at least two full "seasons" to use HW
-            // This should have been caught earlier, we can't do anything now...bail
-            throw new AggregationExecutionException("Holt-Winters aggregation requires at least (2 * period == 2 * "
-                    + period + " == "+(2 * period)+") data-points to function.  Only [" + values.size() + "] were provided.");
-        }
-
-        // Smoothed value
-        double s = 0;
-        double last_s;
-
-        // Trend value
-        double b = 0;
-        double last_b = 0;
-
-        // Seasonal value
-        double[] seasonal = new double[values.size()];
-
-        int counter = 0;
-        double[] vs = new double[values.size()];
-        for (T v : values) {
-            vs[counter] = v.doubleValue() + padding;
-            counter += 1;
-        }
-
-        // Initial level value is average of first season
-        // Calculate the slopes between first and second season for each period
-        for (int i = 0; i < period; i++) {
-            s += vs[i];
-            b += (vs[i + period] - vs[i]) / period;
-        }
-        s /= period;
-        b /= period;
-        last_s = s;
-
-        // Calculate first seasonal
-        if (Double.compare(s, 0.0) == 0 || Double.compare(s, -0.0) == 0) {
-            Arrays.fill(seasonal, 0.0);
-        } else {
-            for (int i = 0; i < period; i++) {
-                seasonal[i] = vs[i] / s;
-            }
-        }
-
-        for (int i = period; i < vs.length; i++) {
-            // TODO if perf is a problem, we can specialize a subclass to avoid conditionals on each iteration
-            if (seasonalityType.equals(SeasonalityType.MULTIPLICATIVE)) {
-                s = alpha * (vs[i] / seasonal[i - period]) + (1.0d - alpha) * (last_s + last_b);
-            } else {
-                s = alpha * (vs[i] - seasonal[i - period]) + (1.0d - alpha) * (last_s + last_b);
-            }
-
-            b = beta * (s - last_s) + (1 - beta) * last_b;
-
-            if (seasonalityType.equals(SeasonalityType.MULTIPLICATIVE)) {
-                seasonal[i] = gamma * (vs[i] / (last_s + last_b )) + (1 - gamma) * seasonal[i - period];
-            } else {
-                seasonal[i] = gamma * (vs[i] - (last_s - last_b )) + (1 - gamma) * seasonal[i - period];
-            }
-
-            last_s = s;
-            last_b = b;
-        }
-
-        double[] forecastValues = new double[numForecasts];
-        for (int i = 1; i <= numForecasts; i++) {
-            int idx = values.size() - period + ((i - 1) % period);
-
-            // TODO perhaps pad out seasonal to a power of 2 and use a mask instead of modulo?
-            if (seasonalityType.equals(SeasonalityType.MULTIPLICATIVE)) {
-                forecastValues[i-1] = (s + (i * b)) * seasonal[idx];
-            } else {
-                forecastValues[i-1] = s + (i * b) + seasonal[idx];
-            }
-        }
-
-        return forecastValues;
+    public double[] next(Collection<Double> values, int numForecasts) {
+        return MovingFunctions.holtWintersForecast(values.stream().mapToDouble(Double::doubleValue).toArray(),
+            alpha, beta, gamma, period, padding, seasonalityType.equals(SeasonalityType.MULTIPLICATIVE), numForecasts);
     }
 
     @Override

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movavg/models/LinearModel.java

@@ -25,6 +25,7 @@ import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.search.aggregations.pipeline.movavg.MovAvgPipelineAggregationBuilder;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctions;
 
 import java.io.IOException;
 import java.text.ParseException;
@@ -74,7 +75,7 @@ public class LinearModel extends MovAvgModel {
     }
 
     @Override
-    protected  <T extends Number> double[] doPredict(Collection<T> values, int numPredictions) {
+    protected double[] doPredict(Collection<Double> values, int numPredictions) {
         double[] predictions = new double[numPredictions];
 
         // EWMA just emits the same final prediction repeatedly.
@@ -84,17 +85,8 @@ public class LinearModel extends MovAvgModel {
     }
 
     @Override
-    public <T extends Number> double next(Collection<T> values) {
-        double avg = 0;
-        long totalWeight = 1;
-        long current = 1;
-
-        for (T v : values) {
-            avg += v.doubleValue() * current;
-            totalWeight += current;
-            current += 1;
-        }
-        return avg / totalWeight;
+    public double next(Collection<Double> values) {
+        return MovingFunctions.linearWeightedAvg(values.stream().mapToDouble(Double::doubleValue).toArray());
     }
 
     @Override

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movavg/models/MovAvgModel.java

@@ -68,20 +68,18 @@ public abstract class MovAvgModel implements NamedWriteable, ToXContentFragment
      * Returns the next value in the series, according to the underlying smoothing model
      *
      * @param values    Collection of numerics to movingAvg, usually windowed
-     * @param <T>       Type of numeric
      * @return          Returns a double, since most smoothing methods operate on floating points
      */
-    public abstract <T extends Number> double next(Collection<T> values);
+    public abstract double next(Collection<Double> values);
 
     /**
      * Predicts the next `n` values in the series.
      *
      * @param values            Collection of numerics to movingAvg, usually windowed
      * @param numPredictions    Number of newly generated predictions to return
-     * @param <T>               Type of numeric
      * @return                  Returns an array of doubles, since most smoothing methods operate on floating points
      */
-    public <T extends Number> double[] predict(Collection<T> values, int numPredictions) {
+    public double[] predict(Collection<Double> values, int numPredictions) {
         assert(numPredictions >= 1);
 
         // If there are no values, we can't do anything.  Return an array of NaNs.
@@ -97,10 +95,9 @@ public abstract class MovAvgModel implements NamedWriteable, ToXContentFragment
      *
      * @param values            Collection of numerics to movingAvg, usually windowed
      * @param numPredictions    Number of newly generated predictions to return
-     * @param <T>               Type of numeric
      * @return                  Returns an array of doubles, since most smoothing methods operate on floating points
      */
-    protected abstract <T extends Number> double[] doPredict(Collection<T> values, int numPredictions);
+    protected abstract double[] doPredict(Collection<Double> values, int numPredictions);
 
     /**
      * Returns an empty set of predictions, filled with NaNs

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movavg/models/SimpleModel.java

@@ -24,6 +24,7 @@ import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.search.aggregations.pipeline.movavg.MovAvgPipelineAggregationBuilder;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctions;
 
 import java.io.IOException;
 import java.text.ParseException;
@@ -72,7 +73,7 @@ public class SimpleModel extends MovAvgModel {
     }
 
     @Override
-    protected <T extends Number> double[] doPredict(Collection<T> values, int numPredictions) {
+    protected double[] doPredict(Collection<Double> values, int numPredictions) {
         double[] predictions = new double[numPredictions];
 
         // Simple just emits the same final prediction repeatedly.
@@ -82,12 +83,8 @@ public class SimpleModel extends MovAvgModel {
     }
 
     @Override
-    public <T extends Number> double next(Collection<T> values) {
-        double avg = 0;
-        for (T v : values) {
-            avg += v.doubleValue();
-        }
-        return avg / values.size();
+    public double next(Collection<Double> values) {
+        return MovingFunctions.unweightedAvg(values.stream().mapToDouble(Double::doubleValue).toArray());
     }
 
     @Override

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movfn/MovFnPipelineAggregationBuilder.java

@@ -0,0 +1,264 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.search.aggregations.pipeline.movfn;
+
+import org.elasticsearch.common.ParseField;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.common.xcontent.ConstructingObjectParser;
+import org.elasticsearch.common.xcontent.ObjectParser;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.script.Script;
+import org.elasticsearch.search.DocValueFormat;
+import org.elasticsearch.search.aggregations.AggregationBuilder;
+import org.elasticsearch.search.aggregations.AggregatorFactory;
+import org.elasticsearch.search.aggregations.PipelineAggregationBuilder;
+import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramAggregatorFactory;
+import org.elasticsearch.search.aggregations.bucket.histogram.HistogramAggregatorFactory;
+import org.elasticsearch.search.aggregations.pipeline.AbstractPipelineAggregationBuilder;
+import org.elasticsearch.search.aggregations.pipeline.BucketHelpers.GapPolicy;
+import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
+
+import java.io.IOException;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
+import java.util.function.Function;
+
+import static org.elasticsearch.search.aggregations.pipeline.PipelineAggregator.Parser.BUCKETS_PATH;
+import static org.elasticsearch.search.aggregations.pipeline.PipelineAggregator.Parser.FORMAT;
+import static org.elasticsearch.search.aggregations.pipeline.PipelineAggregator.Parser.GAP_POLICY;
+
+public class MovFnPipelineAggregationBuilder extends AbstractPipelineAggregationBuilder<MovFnPipelineAggregationBuilder> {
+    public static final String NAME = "moving_fn";
+    private static final ParseField WINDOW = new ParseField("window");
+
+    private final Script script;
+    private final String bucketsPathString;
+    private String format = null;
+    private GapPolicy gapPolicy = GapPolicy.SKIP;
+    private int window;
+
+    private static final Function<String, ConstructingObjectParser<MovFnPipelineAggregationBuilder, Void>> PARSER
+        = name -> {
+
+        @SuppressWarnings("unchecked")
+        ConstructingObjectParser<MovFnPipelineAggregationBuilder, Void> parser = new ConstructingObjectParser<>(
+            MovFnPipelineAggregationBuilder.NAME,
+            false,
+            o -> new MovFnPipelineAggregationBuilder(name, (String) o[0], (Script) o[1], (int)o[2]));
+
+        parser.declareString(ConstructingObjectParser.constructorArg(), BUCKETS_PATH_FIELD);
+        parser.declareField(ConstructingObjectParser.constructorArg(),
+            (p, c) -> Script.parse(p), Script.SCRIPT_PARSE_FIELD, ObjectParser.ValueType.OBJECT_OR_STRING);
+        parser.declareInt(ConstructingObjectParser.constructorArg(), WINDOW);
+
+        parser.declareString(MovFnPipelineAggregationBuilder::format, FORMAT);
+        parser.declareField(MovFnPipelineAggregationBuilder::gapPolicy, p -> {
+            if (p.currentToken() == XContentParser.Token.VALUE_STRING) {
+                return GapPolicy.parse(p.text().toLowerCase(Locale.ROOT), p.getTokenLocation());
+            }
+            throw new IllegalArgumentException("Unsupported token [" + p.currentToken() + "]");
+        }, GAP_POLICY, ObjectParser.ValueType.STRING);
+
+        return parser;
+    };
+
+
+    public MovFnPipelineAggregationBuilder(String name, String bucketsPath, Script script, int window) {
+        super(name, NAME, new String[]{bucketsPath});
+        this.bucketsPathString = bucketsPath;
+        this.script = script;
+        if (window <= 0) {
+            throw new IllegalArgumentException("[" + WINDOW.getPreferredName() + "] must be a positive, non-zero integer.");
+        }
+        this.window = window;
+    }
+
+    public MovFnPipelineAggregationBuilder(StreamInput in) throws IOException {
+        super(in, NAME);
+        bucketsPathString = in.readString();
+        script = new Script(in);
+        format = in.readOptionalString();
+        gapPolicy = GapPolicy.readFrom(in);
+        window = in.readInt();
+    }
+
+    @Override
+    protected void doWriteTo(StreamOutput out) throws IOException {
+        out.writeString(bucketsPathString);
+        script.writeTo(out);
+        out.writeOptionalString(format);
+        gapPolicy.writeTo(out);
+        out.writeInt(window);
+    }
+
+    /**
+     * Sets the format to use on the output of this aggregation.
+     */
+    public MovFnPipelineAggregationBuilder format(String format) {
+        if (Strings.isNullOrEmpty(format)) {
+            throw new IllegalArgumentException("[" + FORMAT.getPreferredName() + "] must not be null or an empty string.");
+        }
+        this.format = format;
+        return this;
+    }
+
+    /**
+     * Gets the format to use on the output of this aggregation.
+     */
+    public String format() {
+        return format;
+    }
+
+    protected DocValueFormat formatter() {
+        if (format != null) {
+            return new DocValueFormat.Decimal(format);
+        }
+        return DocValueFormat.RAW;
+    }
+
+    /**
+     * Sets the gap policy to use for this aggregation.
+     */
+    public MovFnPipelineAggregationBuilder gapPolicy(GapPolicy gapPolicy) {
+        if (gapPolicy == null) {
+            throw new IllegalArgumentException("[" + GAP_POLICY.getPreferredName() + "] must not be null.");
+        }
+        this.gapPolicy = gapPolicy;
+        return this;
+    }
+
+    /**
+     * Gets the gap policy to use for this aggregation.
+     */
+    public GapPolicy gapPolicy() {
+        return gapPolicy;
+    }
+
+    /**
+     * Returns the window size for this aggregation
+     */
+    public int getWindow() {
+        return window;
+    }
+
+    /**
+     * Sets the window size for this aggregation
+     */
+    public void setWindow(int window) {
+        if (window <= 0) {
+            throw new IllegalArgumentException("[" + WINDOW.getPreferredName() + "] must be a positive, non-zero integer.");
+        }
+        this.window = window;
+    }
+
+    @Override
+    public void doValidate(AggregatorFactory<?> parent, List<AggregationBuilder> aggFactories,
+                           List<PipelineAggregationBuilder> pipelineAggregatoractories) {
+        if (window <= 0) {
+            throw new IllegalArgumentException("[" + WINDOW.getPreferredName() + "] must be a positive, non-zero integer.");
+        }
+        if (parent instanceof HistogramAggregatorFactory) {
+            HistogramAggregatorFactory histoParent = (HistogramAggregatorFactory) parent;
+            if (histoParent.minDocCount() != 0) {
+                throw new IllegalStateException("parent histogram of moving_function aggregation [" + name
+                    + "] must have min_doc_count of 0");
+            }
+        } else if (parent instanceof DateHistogramAggregatorFactory) {
+            DateHistogramAggregatorFactory histoParent = (DateHistogramAggregatorFactory) parent;
+            if (histoParent.minDocCount() != 0) {
+                throw new IllegalStateException("parent histogram of moving_function aggregation [" + name
+                    + "] must have min_doc_count of 0");
+            }
+        } else {
+            throw new IllegalStateException("moving_function aggregation [" + name
+                + "] must have a histogram or date_histogram as parent");
+        }
+    }
+
+    @Override
+    protected PipelineAggregator createInternal(Map<String, Object> metaData) throws IOException {
+        return new MovFnPipelineAggregator(name, bucketsPathString, script, window, formatter(), gapPolicy, metaData);
+    }
+
+    @Override
+    protected XContentBuilder internalXContent(XContentBuilder builder, Params params) throws IOException {
+        builder.field(BUCKETS_PATH.getPreferredName(), bucketsPathString);
+        builder.field(Script.SCRIPT_PARSE_FIELD.getPreferredName(), script);
+        if (format != null) {
+            builder.field(FORMAT.getPreferredName(), format);
+        }
+        builder.field(GAP_POLICY.getPreferredName(), gapPolicy.getName());
+        builder.field(WINDOW.getPreferredName(), window);
+        return builder;
+    }
+
+    public static MovFnPipelineAggregationBuilder parse(String aggName, XContentParser parser) {
+        return PARSER.apply(aggName).apply(parser, null);
+    }
+
+    /**
+     * Used for serialization testing, since pipeline aggs serialize themselves as a named object but are parsed
+     * as a regular object with the name passed in.
+     */
+    static MovFnPipelineAggregationBuilder parse(XContentParser parser) throws IOException {
+        parser.nextToken();
+        if (parser.currentToken().equals(XContentParser.Token.START_OBJECT)) {
+            parser.nextToken();
+            if (parser.currentToken().equals(XContentParser.Token.FIELD_NAME)) {
+                String aggName = parser.currentName();
+                parser.nextToken(); // "moving_fn"
+                parser.nextToken(); // start_object
+                return PARSER.apply(aggName).apply(parser, null);
+            }
+        }
+
+        throw new IllegalStateException("Expected aggregation name but none found");
+    }
+
+    @Override
+    protected boolean overrideBucketsPath() {
+        return true;
+    }
+
+    @Override
+    protected int doHashCode() {
+        return Objects.hash(bucketsPathString, script, format, gapPolicy, window);
+    }
+
+    @Override
+    protected boolean doEquals(Object obj) {
+        MovFnPipelineAggregationBuilder other = (MovFnPipelineAggregationBuilder) obj;
+        return Objects.equals(bucketsPathString, other.bucketsPathString)
+            && Objects.equals(script, other.script)
+            && Objects.equals(format, other.format)
+            && Objects.equals(gapPolicy, other.gapPolicy)
+            && Objects.equals(window, other.window);
+    }
+
+    @Override
+    public String getWriteableName() {
+        return NAME;
+    }
+}

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movfn/MovFnPipelineAggregator.java

@@ -0,0 +1,149 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.search.aggregations.pipeline.movfn;
+
+import org.elasticsearch.common.collect.EvictingQueue;
+import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.script.Script;
+import org.elasticsearch.search.DocValueFormat;
+import org.elasticsearch.search.aggregations.InternalAggregation;
+import org.elasticsearch.search.aggregations.InternalAggregations;
+import org.elasticsearch.search.aggregations.InternalMultiBucketAggregation;
+import org.elasticsearch.search.aggregations.bucket.MultiBucketsAggregation;
+import org.elasticsearch.search.aggregations.bucket.histogram.HistogramFactory;
+import org.elasticsearch.search.aggregations.pipeline.BucketHelpers;
+import org.elasticsearch.search.aggregations.pipeline.InternalSimpleValue;
+import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+import java.util.stream.StreamSupport;
+
+import static org.elasticsearch.search.aggregations.pipeline.BucketHelpers.resolveBucketValue;
+
+/**
+ * This pipeline aggregation gives the user the ability to script functions that "move" across a window
+ * of data, instead of single data points.  It is the scripted version of MovingAvg pipeline agg.
+ *
+ * Through custom script contexts, we expose a number of convenience methods:
+ *
+ *  - max
+ *  - min
+ *  - sum
+ *  - unweightedAvg
+ *  - linearWeightedAvg
+ *  - ewma
+ *  - holt
+ *  - holtWintersMovAvg
+ *
+ *  The user can also define any arbitrary logic via their own scripting, or combine with the above methods.
+ */
+public class MovFnPipelineAggregator extends PipelineAggregator {
+    private final DocValueFormat formatter;
+    private final BucketHelpers.GapPolicy gapPolicy;
+    private final Script script;
+    private final String bucketsPath;
+    private final int window;
+
+    MovFnPipelineAggregator(String name, String bucketsPath, Script script, int window, DocValueFormat formatter,
+                            BucketHelpers.GapPolicy gapPolicy, Map<String, Object> metadata) {
+        super(name, new String[]{bucketsPath}, metadata);
+        this.bucketsPath = bucketsPath;
+        this.script = script;
+        this.formatter = formatter;
+        this.gapPolicy = gapPolicy;
+        this.window = window;
+    }
+
+    public MovFnPipelineAggregator(StreamInput in) throws IOException {
+        super(in);
+        script = new Script(in);
+        formatter = in.readNamedWriteable(DocValueFormat.class);
+        gapPolicy = BucketHelpers.GapPolicy.readFrom(in);
+        bucketsPath = in.readString();
+        window = in.readInt();
+    }
+
+    @Override
+    protected void doWriteTo(StreamOutput out) throws IOException {
+        script.writeTo(out);
+        out.writeNamedWriteable(formatter);
+        gapPolicy.writeTo(out);
+        out.writeString(bucketsPath);
+        out.writeInt(window);
+    }
+
+    @Override
+    public String getWriteableName() {
+        return MovFnPipelineAggregationBuilder.NAME;
+    }
+
+    @Override
+    public InternalAggregation reduce(InternalAggregation aggregation, InternalAggregation.ReduceContext reduceContext) {
+        InternalMultiBucketAggregation<? extends InternalMultiBucketAggregation, ? extends InternalMultiBucketAggregation.InternalBucket>
+            histo = (InternalMultiBucketAggregation<? extends InternalMultiBucketAggregation, ? extends
+            InternalMultiBucketAggregation.InternalBucket>) aggregation;
+        List<? extends InternalMultiBucketAggregation.InternalBucket> buckets = histo.getBuckets();
+        HistogramFactory factory = (HistogramFactory) histo;
+
+        List<MultiBucketsAggregation.Bucket> newBuckets = new ArrayList<>();
+        EvictingQueue<Double> values = new EvictingQueue<>(this.window);
+
+        // Initialize the script
+        MovingFunctionScript.Factory scriptFactory = reduceContext.scriptService().compile(script, MovingFunctionScript.CONTEXT);
+        Map<String, Object> vars = new HashMap<>();
+        if (script.getParams() != null) {
+            vars.putAll(script.getParams());
+        }
+
+        MovingFunctionScript executableScript = scriptFactory.newInstance();
+
+        for (InternalMultiBucketAggregation.InternalBucket bucket : buckets) {
+            Double thisBucketValue = resolveBucketValue(histo, bucket, bucketsPaths()[0], gapPolicy);
+
+            // Default is to reuse existing bucket.  Simplifies the rest of the logic,
+            // since we only change newBucket if we can add to it
+            MultiBucketsAggregation.Bucket newBucket = bucket;
+
+            if (thisBucketValue != null && thisBucketValue.equals(Double.NaN) == false) {
+
+                // The custom context mandates that the script returns a double (not Double) so we
+                // don't need null checks, etc.
+                double movavg = executableScript.execute(vars, values.stream().mapToDouble(Double::doubleValue).toArray());
+
+                List<InternalAggregation> aggs = StreamSupport
+                    .stream(bucket.getAggregations().spliterator(), false)
+                    .map(InternalAggregation.class::cast)
+                    .collect(Collectors.toList());
+                aggs.add(new InternalSimpleValue(name(), movavg, formatter, new ArrayList<>(), metaData()));
+                newBucket = factory.createBucket(factory.getKey(bucket), bucket.getDocCount(), new InternalAggregations(aggs));
+                values.offer(thisBucketValue);
+            }
+            newBuckets.add(newBucket);
+        }
+
+        return factory.createAggregation(newBuckets);
+    }
+}

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movfn/MovingFunctionScript.java

@@ -0,0 +1,45 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.search.aggregations.pipeline.movfn;
+
+import org.elasticsearch.script.ScriptContext;
+
+import java.util.Collection;
+import java.util.Map;
+
+/**
+ * This class provides a custom script context for the Moving Function pipeline aggregation,
+ * so that we can expose a number of pre-baked moving functions like min, max, movavg, etc
+ */
+public abstract class MovingFunctionScript {
+    /**
+     * @param params The user-provided parameters
+     * @param values The values in the window that we are moving a function across
+     * @return A double representing the value from this particular window
+     */
+    public abstract double execute(Map<String, Object> params, double[] values);
+
+    public interface Factory {
+        MovingFunctionScript newInstance();
+    }
+
+    public static final String[] PARAMETERS = new String[] {"params", "values"};
+    public static final ScriptContext<Factory> CONTEXT = new ScriptContext<>("moving-function", Factory.class);
+}

server/src/main/java/org/elasticsearch/search/aggregations/pipeline/movfn/MovingFunctions.java

@@ -0,0 +1,359 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.search.aggregations.pipeline.movfn;
+
+import java.util.Arrays;
+import java.util.Collection;
+
+/**
+ * Provides a collection of static utility methods that can be referenced from MovingFunction script contexts
+ */
+public class MovingFunctions {
+
+    /**
+     * Find the maximum value in a window of values.
+     * If all values are missing/null/NaN, the return value will be NaN
+     */
+    public static double max(double[] values) {
+        return Arrays.stream(values).max().orElse(Double.NaN);
+    }
+
+    /**
+     * Find the minimum value in a window of values
+     * If all values are missing/null/NaN, the return value will be NaN
+     */
+    public static double min(double[] values) {
+        return Arrays.stream(values).min().orElse(Double.NaN);
+    }
+
+    /**
+     * Find the sum of a window of values
+     * If all values are missing/null/NaN, the return value will be 0.0
+     */
+    public static double sum(double[] values) {
+        if (values.length == 0) {
+            return 0.0;
+        }
+        return Arrays.stream(values).map(value -> {
+            if (Double.isNaN(value) == false) {
+                return value;
+            }
+            return 0.0;
+        }).sum();
+    }
+
+    /**
+     * Calculate a simple unweighted (arithmetic) moving average.
+     *
+     * Only finite values are averaged.  NaN or null are ignored.
+     * If all values are missing/null/NaN, the return value will be NaN.
+     * The average is based on the count of non-null, non-NaN values.
+     */
+    public static double unweightedAvg(double[] values) {
+        double avg = 0.0;
+        long count = 0;
+        for (double v : values) {
+            if (Double.isNaN(v) == false) {
+                avg += v;
+                count += 1;
+            }
+        }
+        return count == 0 ? Double.NaN : avg / count;
+    }
+
+    /**
+     * Calculate a standard deviation over the values using the provided average.
+     *
+     * Only finite values are averaged.  NaN or null are ignored.
+     * If all values are missing/null/NaN, the return value will be NaN.
+     * The average is based on the count of non-null, non-NaN values.
+     */
+    public static double stdDev(double[] values, double avg) {
+        if (avg == Double.NaN) {
+            return Double.NaN;
+        } else {
+            long count = 0;
+            double squaredMean = 0;
+            for (double v : values) {
+                if (Double.isNaN(v) == false) {
+                    squaredMean += Math.pow(v - avg, 2);
+                    count += 1;
+                }
+            }
+            return Math.sqrt(squaredMean / count);
+        }
+    }
+
+    /**
+     * Calculate a linearly weighted moving average, such that older values are
+     * linearly less important.  "Time" is determined by position in collection
+     *
+     * Only finite values are averaged.  NaN or null are ignored.
+     * If all values are missing/null/NaN, the return value will be NaN
+     * The average is based on the count of non-null, non-NaN values.
+     */
+    public static double linearWeightedAvg(double[] values) {
+        double avg = 0;
+        long totalWeight = 1;
+        long current = 1;
+
+        for (double v : values) {
+            if (Double.isNaN(v) == false) {
+                avg += v * current;
+                totalWeight += current;
+                current += 1;
+            }
+        }
+        return totalWeight == 1 ? Double.NaN : avg / totalWeight;
+    }
+
+    /**
+     *
+     * Calculate a exponentially weighted moving average.
+     *
+     * Alpha controls the smoothing of the data.  Alpha = 1 retains no memory of past values
+     * (e.g. a random walk), while alpha = 0 retains infinite memory of past values (e.g.
+     * the series mean).  Useful values are somewhere in between.  Defaults to 0.5.
+     *
+     * Only finite values are averaged.  NaN or null are ignored.
+     * If all values are missing/null/NaN, the return value will be NaN
+     * The average is based on the count of non-null, non-NaN values.
+     *
+     * @param alpha A double between 0-1 inclusive, controls data smoothing
+     */
+    public static double ewma(double[] values, double alpha) {
+        double avg = Double.NaN;
+        boolean first = true;
+
+        for (double v : values) {
+            if (Double.isNaN(v) == false) {
+                if (first) {
+                    avg = v;
+                    first = false;
+                } else {
+                    avg = (v * alpha) + (avg * (1 - alpha));
+                }
+            }
+        }
+        return avg;
+    }
+
+    /**
+     * Calculate a doubly exponential weighted moving average
+     *
+     * Alpha controls the smoothing of the data.  Alpha = 1 retains no memory of past values
+     * (e.g. a random walk), while alpha = 0 retains infinite memory of past values (e.g.
+     * the series mean).  Useful values are somewhere in between.  Defaults to 0.5.
+     *
+     * Beta is equivalent to alpha, but controls the smoothing of the trend instead of the data
+     *
+     * Only finite values are averaged.  NaN or null are ignored.
+     * If all values are missing/null/NaN, the return value will be NaN
+     * The average is based on the count of non-null, non-NaN values.
+     *
+     * @param alpha A double between 0-1 inclusive, controls data smoothing
+     * @param beta a double between 0-1 inclusive, controls trend smoothing
+     */
+    public static double holt(double[] values, double alpha, double beta) {
+        if (values.length == 0) {
+            return Double.NaN;
+        }
+
+        return holtForecast(values, alpha, beta, 1)[0];
+    }
+
+    /**
+     * Version of holt that can "forecast", not exposed as a whitelisted function for moving_fn scripts, but
+     * here as compatibility/code sharing for existing moving_avg agg.  Can be removed when moving_avg is gone.
+     */
+    public static double[] holtForecast(double[] values, double alpha, double beta, int numForecasts) {
+
+        // Smoothed value
+        double s = 0;
+        double last_s = 0;
+
+        // Trend value
+        double b = 0;
+        double last_b = 0;
+
+        int counter = 0;
+
+        Double last;
+        for (double v : values) {
+            if (Double.isNaN(v) == false) {
+                last = v;
+                if (counter == 0) {
+                    s = v;
+                    b = v - last;
+                } else {
+                    s = alpha * v + (1.0d - alpha) * (last_s + last_b);
+                    b = beta * (s - last_s) + (1 - beta) * last_b;
+                }
+
+                counter += 1;
+                last_s = s;
+                last_b = b;
+            }
+        }
+
+        if (counter == 0) {
+            return emptyPredictions(numForecasts);
+        }
+
+        double[] forecastValues = new double[numForecasts];
+        for (int i = 0; i < numForecasts; i++) {
+            forecastValues[i] = s + (i * b);
+        }
+
+        return forecastValues;
+    }
+
+    /**
+     * Calculate a triple exponential weighted moving average
+     *
+     * Alpha controls the smoothing of the data.  Alpha = 1 retains no memory of past values
+     * (e.g. a random walk), while alpha = 0 retains infinite memory of past values (e.g.
+     * the series mean).  Useful values are somewhere in between.  Defaults to 0.5.
+     *
+     * Beta is equivalent to alpha, but controls the smoothing of the trend instead of the data.
+     * Gamma is equivalent to alpha, but controls the smoothing of the seasonality instead of the data
+     *
+     * Only finite values are averaged.  NaN or null are ignored.
+     * If all values are missing/null/NaN, the return value will be NaN
+     * The average is based on the count of non-null, non-NaN values.
+     *
+     * @param alpha A double between 0-1 inclusive, controls data smoothing
+     * @param beta a double between 0-1 inclusive, controls trend smoothing
+     * @param gamma a double between 0-1 inclusive, controls seasonality smoothing
+     * @param period the expected periodicity of the data
+     * @param multiplicative true if multiplicative HW should be used. False for additive
+     */
+    public static double holtWinters(double[] values, double alpha, double beta, double gamma,
+                                           int period, boolean multiplicative) {
+
+        if (values.length == 0) {
+            return Double.NaN;
+        }
+
+        double padding = multiplicative ? 0.0000000001 : 0.0;
+        return holtWintersForecast(values, alpha, beta, gamma, period, padding, multiplicative, 1)[0];
+    }
+
+    /**
+     * Version of holt-winters that can "forecast", not exposed as a whitelisted function for moving_fn scripts, but
+     * here as compatibility/code sharing for existing moving_avg agg.  Can be removed when moving_avg is gone.
+     */
+    public static double[] holtWintersForecast(double[] values, double alpha, double beta, double gamma,
+                                             int period, double padding, boolean multiplicative, int numForecasts) {
+        if (values.length < period * 2) {
+            // We need at least two full "seasons" to use HW
+            // This should have been caught earlier, we can't do anything now...bail
+            throw new IllegalArgumentException("Holt-Winters aggregation requires at least (2 * period == 2 * "
+                + period + " == "+(2 * period)+") data-points to function.  Only [" + values.length + "] were provided.");
+        }
+
+        // Smoothed value
+        double s = 0;
+        double last_s;
+
+        // Trend value
+        double b = 0;
+        double last_b = 0;
+
+        // Seasonal value
+        double[] seasonal = new double[values.length];
+
+        int counter = 0;
+        double[] vs = new double[values.length];
+        for (double v : values) {
+            if (Double.isNaN(v) == false) {
+                vs[counter] = v + padding;
+                counter += 1;
+            }
+        }
+
+        if (counter == 0) {
+            return emptyPredictions(numForecasts);
+        }
+
+        // Initial level value is average of first season
+        // Calculate the slopes between first and second season for each period
+        for (int i = 0; i < period; i++) {
+            s += vs[i];
+            b += (vs[i + period] - vs[i]) / period;
+        }
+        s /= period;
+        b /= period;
+        last_s = s;
+
+        // Calculate first seasonal
+        if (Double.compare(s, 0.0) == 0 || Double.compare(s, -0.0) == 0) {
+            Arrays.fill(seasonal, 0.0);
+        } else {
+            for (int i = 0; i < period; i++) {
+                seasonal[i] = vs[i] / s;
+            }
+        }
+
+        for (int i = period; i < vs.length; i++) {
+            // TODO if perf is a problem, we can specialize a subclass to avoid conditionals on each iteration
+            if (multiplicative) {
+                s = alpha * (vs[i] / seasonal[i - period]) + (1.0d - alpha) * (last_s + last_b);
+            } else {
+                s = alpha * (vs[i] - seasonal[i - period]) + (1.0d - alpha) * (last_s + last_b);
+            }
+
+            b = beta * (s - last_s) + (1 - beta) * last_b;
+
+            if (multiplicative) {
+                seasonal[i] = gamma * (vs[i] / (last_s + last_b )) + (1 - gamma) * seasonal[i - period];
+            } else {
+                seasonal[i] = gamma * (vs[i] - (last_s - last_b )) + (1 - gamma) * seasonal[i - period];
+            }
+
+            last_s = s;
+            last_b = b;
+        }
+
+        double[] forecastValues = new double[numForecasts];
+        for (int i = 1; i <= numForecasts; i++) {
+            int idx = values.length - period + ((i - 1) % period);
+
+            // TODO perhaps pad out seasonal to a power of 2 and use a mask instead of modulo?
+            if (multiplicative) {
+                forecastValues[i-1] = (s + (i * b)) * seasonal[idx];
+            } else {
+                forecastValues[i-1] = s + (i * b) + seasonal[idx];
+            }
+        }
+
+        return forecastValues;
+    }
+
+    /**
+     * Returns an empty set of predictions, filled with NaNs
+     * @param numPredictions Number of empty predictions to generate
+     */
+    private static double[] emptyPredictions(int numPredictions) {
+        double[] predictions = new double[numPredictions];
+        Arrays.fill(predictions, Double.NaN);
+        return predictions;
+    }
+}

server/src/main/java/org/elasticsearch/tasks/TaskInfo.java

@@ -32,6 +32,7 @@ import org.elasticsearch.common.xcontent.ObjectParserHelper;
 import org.elasticsearch.common.xcontent.ToXContent.Params;
 import org.elasticsearch.common.xcontent.ToXContentFragment;
 import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
 
 import java.io.IOException;
 import java.util.Collections;
@@ -214,6 +215,10 @@ public final class TaskInfo implements Writeable, ToXContentFragment {
         return builder;
     }
 
+    public static TaskInfo fromXContent(XContentParser parser) {
+        return PARSER.apply(parser, null);
+    }
+
     public static final ConstructingObjectParser<TaskInfo, Void> PARSER = new ConstructingObjectParser<>(
             "task_info", true, a -> {
                 int i = 0;

server/src/test/java/org/elasticsearch/action/TaskOperationFailureTests.java

@@ -0,0 +1,63 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.action;
+
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.test.AbstractXContentTestCase;
+
+import java.io.IOException;
+
+import static org.hamcrest.Matchers.equalTo;
+
+public class TaskOperationFailureTests extends AbstractXContentTestCase<TaskOperationFailure> {
+
+    @Override
+    protected TaskOperationFailure createTestInstance() {
+        return new TaskOperationFailure(randomAlphaOfLength(5), randomNonNegativeLong(), new IllegalStateException("message"));
+    }
+
+    @Override
+    protected TaskOperationFailure doParseInstance(XContentParser parser) throws IOException {
+        return TaskOperationFailure.fromXContent(parser);
+    }
+
+    @Override
+    protected void assertEqualInstances(TaskOperationFailure expectedInstance, TaskOperationFailure newInstance) {
+        assertNotSame(expectedInstance, newInstance);
+        assertThat(newInstance.getNodeId(), equalTo(expectedInstance.getNodeId()));
+        assertThat(newInstance.getTaskId(), equalTo(expectedInstance.getTaskId()));
+        assertThat(newInstance.getStatus(), equalTo(expectedInstance.getStatus()));
+        // XContent loses the original exception and wraps it as a message in Elasticsearch exception
+        assertThat(newInstance.getCause().getMessage(), equalTo("Elasticsearch exception [type=illegal_state_exception, reason=message]"));
+        // getReason returns Exception class and the message
+        assertThat(newInstance.getReason(),
+            equalTo("ElasticsearchException[Elasticsearch exception [type=illegal_state_exception, reason=message]]"));
+    }
+
+    @Override
+    protected boolean supportsUnknownFields() {
+        return false;
+    }
+
+    @Override
+    protected boolean assertToXContentEquivalence() {
+        return false;
+    }
+}

server/src/test/java/org/elasticsearch/action/admin/cluster/node/tasks/TasksIT.java

@@ -18,6 +18,7 @@
  */
 package org.elasticsearch.action.admin.cluster.node.tasks;
 
+import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.ElasticsearchTimeoutException;
 import org.elasticsearch.ExceptionsHelper;
 import org.elasticsearch.ResourceNotFoundException;
@@ -716,7 +717,7 @@ public class TasksIT extends ESIntegTestCase {
             .setTimeout(timeValueSeconds(10)).get();
 
         // It should finish quickly and without complaint and list the list tasks themselves
-        assertThat(response.getNodeFailures(), emptyCollectionOf(FailedNodeException.class));
+        assertThat(response.getNodeFailures(), emptyCollectionOf(ElasticsearchException.class));
         assertThat(response.getTaskFailures(), emptyCollectionOf(TaskOperationFailure.class));
         assertThat(response.getTasks().size(), greaterThanOrEqualTo(1));
     }

server/src/test/java/org/elasticsearch/action/admin/indices/create/ShrinkIndexIT.java

@@ -23,6 +23,7 @@ import org.apache.lucene.search.Sort;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.SortedSetSelector;
 import org.apache.lucene.search.SortedSetSortField;
+import org.apache.lucene.util.LuceneTestCase.AwaitsFix;
 import org.elasticsearch.Version;
 import org.elasticsearch.action.admin.cluster.reroute.ClusterRerouteResponse;
 import org.elasticsearch.action.admin.cluster.state.ClusterStateRequest;
@@ -83,6 +84,7 @@ public class ShrinkIndexIT extends ESIntegTestCase {
         return Arrays.asList(InternalSettingsPlugin.class);
     }
 
+    @AwaitsFix(bugUrl = "https://issues.apache.org/jira/browse/LUCENE-8318")
     public void testCreateShrinkIndexToN() {
         int[][] possibleShardSplits = new int[][] {{8,4,2}, {9, 3, 1}, {4, 2, 1}, {15,5,1}};
         int[] shardSplits = randomFrom(possibleShardSplits);

server/src/test/java/org/elasticsearch/action/support/IndicesOptionsTests.java

@@ -28,23 +28,51 @@ import org.elasticsearch.test.EqualsHashCodeTestUtils;
 import java.util.HashMap;
 import java.util.Map;
 
-import static org.elasticsearch.test.VersionUtils.randomVersion;
+import static org.elasticsearch.test.VersionUtils.randomVersionBetween;
 import static org.hamcrest.CoreMatchers.equalTo;
 
 public class IndicesOptionsTests extends ESTestCase {
+
     public void testSerialization() throws Exception {
         int iterations = randomIntBetween(5, 20);
         for (int i = 0; i < iterations; i++) {
+            Version version = randomVersionBetween(random(), Version.V_7_0_0_alpha1, null);
             IndicesOptions indicesOptions = IndicesOptions.fromOptions(
                 randomBoolean(), randomBoolean(), randomBoolean(), randomBoolean(), randomBoolean(), randomBoolean(), randomBoolean());
 
             BytesStreamOutput output = new BytesStreamOutput();
-            Version outputVersion = randomVersion(random());
-            output.setVersion(outputVersion);
+            output.setVersion(version);
             indicesOptions.writeIndicesOptions(output);
 
             StreamInput streamInput = output.bytes().streamInput();
-            streamInput.setVersion(randomVersion(random()));
+            streamInput.setVersion(version);
+            IndicesOptions indicesOptions2 = IndicesOptions.readIndicesOptions(streamInput);
+
+            assertThat(indicesOptions2.ignoreUnavailable(), equalTo(indicesOptions.ignoreUnavailable()));
+            assertThat(indicesOptions2.allowNoIndices(), equalTo(indicesOptions.allowNoIndices()));
+            assertThat(indicesOptions2.expandWildcardsOpen(), equalTo(indicesOptions.expandWildcardsOpen()));
+            assertThat(indicesOptions2.expandWildcardsClosed(), equalTo(indicesOptions.expandWildcardsClosed()));
+
+            assertThat(indicesOptions2.forbidClosedIndices(), equalTo(indicesOptions.forbidClosedIndices()));
+            assertThat(indicesOptions2.allowAliasesToMultipleIndices(), equalTo(indicesOptions.allowAliasesToMultipleIndices()));
+
+            assertEquals(indicesOptions2.ignoreAliases(), indicesOptions.ignoreAliases());
+        }
+    }
+
+    public void testSerializationPre70() throws Exception {
+        int iterations = randomIntBetween(5, 20);
+        for (int i = 0; i < iterations; i++) {
+            Version version = randomVersionBetween(random(), null, Version.V_6_4_0);
+            IndicesOptions indicesOptions = IndicesOptions.fromOptions(randomBoolean(), randomBoolean(), randomBoolean(), randomBoolean(),
+                    randomBoolean(), randomBoolean(), randomBoolean());
+
+            BytesStreamOutput output = new BytesStreamOutput();
+            output.setVersion(version);
+            indicesOptions.writeIndicesOptions(output);
+
+            StreamInput streamInput = output.bytes().streamInput();
+            streamInput.setVersion(version);
             IndicesOptions indicesOptions2 = IndicesOptions.readIndicesOptions(streamInput);
 
             assertThat(indicesOptions2.ignoreUnavailable(), equalTo(indicesOptions.ignoreUnavailable()));

server/src/test/java/org/elasticsearch/cluster/metadata/TemplateUpgradeServiceTests.java

@@ -38,6 +38,7 @@ import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.settings.ClusterSettings;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.util.concurrent.ThreadContext;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.threadpool.ThreadPool;
 
@@ -61,6 +62,7 @@ import static java.util.Collections.emptyMap;
 import static org.elasticsearch.test.VersionUtils.randomVersion;
 import static org.hamcrest.CoreMatchers.nullValue;
 import static org.hamcrest.CoreMatchers.startsWith;
+import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.hasSize;
@@ -188,9 +190,16 @@ public class TemplateUpgradeServiceTests extends ESTestCase {
             additions.put("add_template_" + i, new BytesArray("{\"index_patterns\" : \"*\", \"order\" : " + i + "}"));
         }
 
-        TemplateUpgradeService service = new TemplateUpgradeService(Settings.EMPTY, mockClient, clusterService, null,
+        ThreadPool threadPool = mock(ThreadPool.class);
+        ThreadContext threadContext = new ThreadContext(Settings.EMPTY);
+        when(threadPool.getThreadContext()).thenReturn(threadContext);
+        TemplateUpgradeService service = new TemplateUpgradeService(Settings.EMPTY, mockClient, clusterService, threadPool,
             Collections.emptyList());
 
+        IllegalStateException ise = expectThrows(IllegalStateException.class, () -> service.updateTemplates(additions, deletions));
+        assertThat(ise.getMessage(), containsString("template upgrade service should always happen in a system context"));
+
+        threadContext.markAsSystemContext();
         service.updateTemplates(additions, deletions);
         int updatesInProgress = service.getUpdatesInProgress();
 
@@ -241,11 +250,14 @@ public class TemplateUpgradeServiceTests extends ESTestCase {
         );
 
         ThreadPool threadPool = mock(ThreadPool.class);
+        ThreadContext threadContext = new ThreadContext(Settings.EMPTY);
+        when(threadPool.getThreadContext()).thenReturn(threadContext);
         ExecutorService executorService = mock(ExecutorService.class);
         when(threadPool.generic()).thenReturn(executorService);
         doAnswer(invocation -> {
             Object[] args = invocation.getArguments();
             assert args.length == 1;
+            assertTrue(threadContext.isSystemContext());
             Runnable runnable = (Runnable) args[0];
             runnable.run();
             updateInvocation.incrementAndGet();

server/src/test/java/org/elasticsearch/index/mapper/RangeFieldTypeTests.java

@@ -77,12 +77,12 @@ public class RangeFieldTypeTests extends FieldTypeTestCase {
 
     @Override
     protected RangeFieldType createDefaultFieldType() {
-        return new RangeFieldType(type, Version.CURRENT);
+        return new RangeFieldType(type);
     }
 
     public void testRangeQuery() throws Exception {
         QueryShardContext context = createContext();
-        RangeFieldType ft = new RangeFieldType(type, Version.CURRENT);
+        RangeFieldType ft = new RangeFieldType(type);
         ft.setName(FIELDNAME);
         ft.setIndexOptions(IndexOptions.DOCS);
 
@@ -106,7 +106,7 @@ public class RangeFieldTypeTests extends FieldTypeTestCase {
 
     public void testDateRangeQueryUsingMappingFormat() {
         QueryShardContext context = createContext();
-        RangeFieldType fieldType = new RangeFieldType(RangeType.DATE, Version.CURRENT);
+        RangeFieldType fieldType = new RangeFieldType(RangeType.DATE);
         fieldType.setName(FIELDNAME);
         fieldType.setIndexOptions(IndexOptions.DOCS);
         fieldType.setHasDocValues(false);
@@ -313,7 +313,7 @@ public class RangeFieldTypeTests extends FieldTypeTestCase {
     public void testTermQuery() throws Exception {
         // See https://github.com/elastic/elasticsearch/issues/25950
         QueryShardContext context = createContext();
-        RangeFieldType ft = new RangeFieldType(type, Version.CURRENT);
+        RangeFieldType ft = new RangeFieldType(type);
         ft.setName(FIELDNAME);
         ft.setIndexOptions(IndexOptions.DOCS);
 

server/src/test/java/org/elasticsearch/index/store/DirectoryUtilsTests.java

@@ -1,86 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.elasticsearch.index.store;
-
-import org.apache.lucene.store.BaseDirectoryWrapper;
-import org.apache.lucene.store.FSDirectory;
-import org.apache.lucene.store.FileSwitchDirectory;
-import org.apache.lucene.store.FilterDirectory;
-import org.apache.lucene.store.RAMDirectory;
-import org.elasticsearch.test.ESTestCase;
-
-import java.io.IOException;
-import java.nio.file.Path;
-import java.util.Collections;
-import java.util.Set;
-
-import static org.hamcrest.CoreMatchers.notNullValue;
-import static org.hamcrest.CoreMatchers.nullValue;
-import static org.hamcrest.CoreMatchers.sameInstance;
-
-public class DirectoryUtilsTests extends ESTestCase {
-    public void testGetLeave() throws IOException {
-        Path file = createTempDir();
-        final int iters = scaledRandomIntBetween(10, 100);
-        for (int i = 0; i < iters; i++) {
-            {
-                BaseDirectoryWrapper dir = newFSDirectory(file);
-                FSDirectory directory = DirectoryUtils.getLeaf(new FilterDirectory(dir) {}, FSDirectory.class, null);
-                assertThat(directory, notNullValue());
-                assertThat(directory, sameInstance(DirectoryUtils.getLeafDirectory(dir, null)));
-                dir.close();
-            }
-
-            {
-                BaseDirectoryWrapper dir = newFSDirectory(file);
-                FSDirectory directory = DirectoryUtils.getLeaf(dir, FSDirectory.class, null);
-                assertThat(directory, notNullValue());
-                assertThat(directory, sameInstance(DirectoryUtils.getLeafDirectory(dir, null)));
-                dir.close();
-            }
-
-            {
-                Set<String> stringSet = Collections.emptySet();
-                BaseDirectoryWrapper dir = newFSDirectory(file);
-                FSDirectory directory = DirectoryUtils.getLeaf(new FileSwitchDirectory(stringSet, dir, dir, random().nextBoolean()), FSDirectory.class, null);
-                assertThat(directory, notNullValue());
-                assertThat(directory, sameInstance(DirectoryUtils.getLeafDirectory(dir, null)));
-                dir.close();
-            }
-
-            {
-                Set<String> stringSet = Collections.emptySet();
-                BaseDirectoryWrapper dir = newFSDirectory(file);
-                FSDirectory directory = DirectoryUtils.getLeaf(new FilterDirectory(new FileSwitchDirectory(stringSet, dir, dir, random().nextBoolean())) {}, FSDirectory.class, null);
-                assertThat(directory, notNullValue());
-                assertThat(directory, sameInstance(DirectoryUtils.getLeafDirectory(dir, null)));
-                dir.close();
-            }
-
-            {
-                Set<String> stringSet = Collections.emptySet();
-                BaseDirectoryWrapper dir = newFSDirectory(file);
-                RAMDirectory directory = DirectoryUtils.getLeaf(new FilterDirectory(new FileSwitchDirectory(stringSet, dir, dir, random().nextBoolean())) {}, RAMDirectory.class, null);
-                assertThat(directory, nullValue());
-                dir.close();
-            }
-
-        }
-    }
-}

server/src/test/java/org/elasticsearch/search/aggregations/bucket/histogram/DateHistogramAggregatorTests.java

@@ -446,7 +446,7 @@ public class DateHistogramAggregatorTests extends AggregatorTestCase {
 
                 InternalDateHistogram histogram;
                 if (reduced) {
-                    histogram = searchAndReduce(indexSearcher, query, aggregationBuilder, maxBucket, fieldType);
+                    histogram = searchAndReduce(indexSearcher, query, aggregationBuilder, maxBucket, null, fieldType);
                 } else {
                     histogram = search(indexSearcher, query, aggregationBuilder, maxBucket, fieldType);
                 }

server/src/test/java/org/elasticsearch/search/aggregations/bucket/histogram/DateHistogramTests.java

@@ -17,14 +17,27 @@
  * under the License.
  */
 
-package org.elasticsearch.search.aggregations.bucket;
+package org.elasticsearch.search.aggregations.bucket.histogram;
 
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.LongPoint;
+import org.apache.lucene.document.SortedNumericDocValuesField;
+import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.IndexWriter;
+import org.apache.lucene.store.Directory;
+import org.elasticsearch.common.joda.FormatDateTimeFormatter;
+import org.elasticsearch.common.joda.Joda;
+import org.elasticsearch.index.query.QueryShardContext;
 import org.elasticsearch.search.aggregations.BaseAggregationTestCase;
+import org.elasticsearch.search.aggregations.BucketOrder;
 import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramAggregationBuilder;
 import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramInterval;
 import org.elasticsearch.search.aggregations.bucket.histogram.ExtendedBoundsTests;
-import org.elasticsearch.search.aggregations.BucketOrder;
+import org.joda.time.DateTimeZone;
+import org.junit.Assume;
 
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
 
@@ -120,4 +133,73 @@ public class DateHistogramTests extends BaseAggregationTestCase<DateHistogramAgg
         return orders;
     }
 
+    private static Document documentForDate(String field, long millis) {
+        Document doc = new Document();
+        doc.add(new LongPoint(field, millis));
+        doc.add(new SortedNumericDocValuesField(field, millis));
+        return doc;
+    }
+
+    public void testRewriteTimeZone() throws IOException {
+        Assume.assumeTrue(getCurrentTypes().length > 0); // we need mappings
+        FormatDateTimeFormatter format = Joda.forPattern("strict_date_optional_time");
+
+        try (Directory dir = newDirectory();
+                IndexWriter w = new IndexWriter(dir, newIndexWriterConfig())) {
+
+            w.addDocument(documentForDate(DATE_FIELD_NAME, format.parser().parseDateTime("2018-03-11T11:55:00").getMillis()));
+            w.addDocument(documentForDate(DATE_FIELD_NAME, format.parser().parseDateTime("2017-10-30T18:13:00").getMillis()));
+
+            try (IndexReader readerThatDoesntCross = DirectoryReader.open(w)) {
+
+                w.addDocument(documentForDate(DATE_FIELD_NAME, format.parser().parseDateTime("2018-03-25T02:44:00").getMillis()));
+
+                try (IndexReader readerThatCrosses = DirectoryReader.open(w)) {
+
+                    QueryShardContext shardContextThatDoesntCross = createShardContext(readerThatDoesntCross);
+                    QueryShardContext shardContextThatCrosses = createShardContext(readerThatCrosses);
+
+                    DateHistogramAggregationBuilder builder = new DateHistogramAggregationBuilder("my_date_histo");
+                    builder.field(DATE_FIELD_NAME);
+                    builder.dateHistogramInterval(DateHistogramInterval.DAY);
+
+                    // no timeZone => no rewrite
+                    assertNull(builder.rewriteTimeZone(shardContextThatDoesntCross));
+                    assertNull(builder.rewriteTimeZone(shardContextThatCrosses));
+
+                    // fixed timeZone => no rewrite
+                    DateTimeZone tz = DateTimeZone.forOffsetHours(1);
+                    builder.timeZone(tz);
+                    assertSame(tz, builder.rewriteTimeZone(shardContextThatDoesntCross));
+                    assertSame(tz, builder.rewriteTimeZone(shardContextThatCrosses));
+
+                    // daylight-saving-times => rewrite if doesn't cross
+                    tz = DateTimeZone.forID("Europe/Paris");
+                    builder.timeZone(tz);
+                    assertEquals(DateTimeZone.forOffsetHours(1), builder.rewriteTimeZone(shardContextThatDoesntCross));
+                    assertSame(tz, builder.rewriteTimeZone(shardContextThatCrosses));
+
+                    // Rounded values are no longer all within the same transitions => no rewrite
+                    builder.dateHistogramInterval(DateHistogramInterval.MONTH);
+                    assertSame(tz, builder.rewriteTimeZone(shardContextThatDoesntCross));
+                    assertSame(tz, builder.rewriteTimeZone(shardContextThatCrosses));
+
+                    builder = new DateHistogramAggregationBuilder("my_date_histo");
+                    builder.field(DATE_FIELD_NAME);
+                    builder.timeZone(tz);
+
+                    builder.interval(1000L * 60 * 60 * 24); // ~ 1 day
+                    assertEquals(DateTimeZone.forOffsetHours(1), builder.rewriteTimeZone(shardContextThatDoesntCross));
+                    assertSame(tz, builder.rewriteTimeZone(shardContextThatCrosses));
+
+                    // Because the interval is large, rounded values are not
+                    // within the same transitions as the values => no rewrite
+                    builder.interval(1000L * 60 * 60 * 24 * 30); // ~ 1 month
+                    assertSame(tz, builder.rewriteTimeZone(shardContextThatDoesntCross));
+                    assertSame(tz, builder.rewriteTimeZone(shardContextThatCrosses));
+                }
+            }
+        }
+    }
+
 }

server/src/test/java/org/elasticsearch/search/aggregations/pipeline/bucketmetrics/avg/AvgBucketAggregatorTests.java

@@ -0,0 +1,146 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.search.aggregations.pipeline.bucketmetrics.avg;
+
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.SortedNumericDocValuesField;
+import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.RandomIndexWriter;
+import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.MatchAllDocsQuery;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.store.Directory;
+import org.elasticsearch.index.mapper.DateFieldMapper;
+import org.elasticsearch.index.mapper.MappedFieldType;
+import org.elasticsearch.index.mapper.NumberFieldMapper;
+import org.elasticsearch.search.aggregations.Aggregation;
+import org.elasticsearch.search.aggregations.Aggregations;
+import org.elasticsearch.search.aggregations.AggregatorTestCase;
+import org.elasticsearch.search.aggregations.InternalAggregation;
+import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramAggregationBuilder;
+import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramInterval;
+import org.elasticsearch.search.aggregations.bucket.histogram.InternalDateHistogram;
+import org.elasticsearch.search.aggregations.metrics.avg.AvgAggregationBuilder;
+import org.elasticsearch.search.aggregations.metrics.avg.InternalAvg;
+import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+
+
+public class AvgBucketAggregatorTests extends AggregatorTestCase {
+    private static final String DATE_FIELD = "date";
+    private static final String VALUE_FIELD = "value";
+
+    private static final List<String> dataset = Arrays.asList(
+        "2010-03-12T01:07:45",
+        "2010-04-27T03:43:34",
+        "2012-05-18T04:11:00",
+        "2013-05-29T05:11:31",
+        "2013-10-31T08:24:05",
+        "2015-02-13T13:09:32",
+        "2015-06-24T13:47:43",
+        "2015-11-13T16:14:34",
+        "2016-03-04T17:09:50",
+        "2017-12-12T22:55:46");
+
+    /**
+     * Test for issue #30608.  Under the following circumstances:
+     *
+     * A. Multi-bucket agg in the first entry of our internal list
+     * B. Regular agg as the immediate child of the multi-bucket in A
+     * C. Regular agg with the same name as B at the top level, listed as the second entry in our internal list
+     * D. Finally, a pipeline agg with the path down to B
+     *
+     * BucketMetrics reduction would throw a class cast exception due to bad subpathing.  This test ensures
+     * it is fixed.
+     *
+     * Note: we have this test inside of the `avg_bucket` package so that we can get access to the package-private
+     * `doReduce()` needed for testing this
+     */
+    public void testSameAggNames() throws IOException {
+        Query query = new MatchAllDocsQuery();
+
+        AvgAggregationBuilder avgBuilder = new AvgAggregationBuilder("foo").field(VALUE_FIELD);
+        DateHistogramAggregationBuilder histo = new DateHistogramAggregationBuilder("histo")
+            .dateHistogramInterval(DateHistogramInterval.YEAR)
+            .field(DATE_FIELD)
+            .subAggregation(new AvgAggregationBuilder("foo").field(VALUE_FIELD));
+
+        AvgBucketPipelineAggregationBuilder avgBucketBuilder
+            = new AvgBucketPipelineAggregationBuilder("the_avg_bucket", "histo>foo");
+
+        try (Directory directory = newDirectory()) {
+            try (RandomIndexWriter indexWriter = new RandomIndexWriter(random(), directory)) {
+                Document document = new Document();
+                for (String date : dataset) {
+                    if (frequently()) {
+                        indexWriter.commit();
+                    }
+
+                    document.add(new SortedNumericDocValuesField(DATE_FIELD, asLong(date)));
+                    document.add(new SortedNumericDocValuesField(VALUE_FIELD, randomInt()));
+                    indexWriter.addDocument(document);
+                    document.clear();
+                }
+            }
+
+            InternalAvg avgResult;
+            InternalDateHistogram histogramResult;
+            try (IndexReader indexReader = DirectoryReader.open(directory)) {
+                IndexSearcher indexSearcher = newSearcher(indexReader, true, true);
+
+                DateFieldMapper.Builder builder = new DateFieldMapper.Builder("histo");
+                DateFieldMapper.DateFieldType fieldType = builder.fieldType();
+                fieldType.setHasDocValues(true);
+                fieldType.setName(DATE_FIELD);
+
+                MappedFieldType valueFieldType = new NumberFieldMapper.NumberFieldType(NumberFieldMapper.NumberType.LONG);
+                valueFieldType.setName(VALUE_FIELD);
+                valueFieldType.setHasDocValues(true);
+
+                avgResult = searchAndReduce(indexSearcher, query, avgBuilder, 10000, null,
+                    new MappedFieldType[]{fieldType, valueFieldType});
+                histogramResult = searchAndReduce(indexSearcher, query, histo, 10000, null,
+                    new MappedFieldType[]{fieldType, valueFieldType});
+            }
+
+            // Finally, reduce the pipeline agg
+            PipelineAggregator avgBucketAgg = avgBucketBuilder.createInternal(Collections.emptyMap());
+            List<Aggregation> reducedAggs = new ArrayList<>(2);
+
+            // Histo has to go first to exercise the bug
+            reducedAggs.add(histogramResult);
+            reducedAggs.add(avgResult);
+            Aggregations aggregations = new Aggregations(reducedAggs);
+            InternalAggregation pipelineResult = ((AvgBucketPipelineAggregator)avgBucketAgg).doReduce(aggregations, null);
+            assertNotNull(pipelineResult);
+        }
+    }
+
+
+    private static long asLong(String dateTime) {
+        return DateFieldMapper.DEFAULT_DATE_TIME_FORMATTER.parser().parseDateTime(dateTime).getMillis();
+    }
+}

server/src/test/java/org/elasticsearch/search/aggregations/pipeline/movfn/MovFnPipelineAggregationBuilderSerializationTests.java

@@ -0,0 +1,51 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.search.aggregations.pipeline.movfn;
+
+import org.elasticsearch.common.io.stream.Writeable;
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.script.Script;
+import org.elasticsearch.test.AbstractSerializingTestCase;
+
+import java.io.IOException;
+
+public class MovFnPipelineAggregationBuilderSerializationTests extends AbstractSerializingTestCase<MovFnPipelineAggregationBuilder> {
+
+    @Override
+    protected MovFnPipelineAggregationBuilder createTestInstance() {
+        return new MovFnPipelineAggregationBuilder(randomAlphaOfLength(10), "foo", new Script("foo"), randomIntBetween(1, 10));
+    }
+
+    @Override
+    protected Writeable.Reader<MovFnPipelineAggregationBuilder> instanceReader() {
+        return MovFnPipelineAggregationBuilder::new;
+    }
+
+    @Override
+    protected MovFnPipelineAggregationBuilder doParseInstance(XContentParser parser) throws IOException {
+        return MovFnPipelineAggregationBuilder.parse(parser);
+    }
+
+    @Override
+    protected boolean supportsUnknownFields() {
+        return false;
+    }
+}
+

server/src/test/java/org/elasticsearch/search/aggregations/pipeline/movfn/MovFnUnitTests.java

@@ -0,0 +1,164 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.search.aggregations.pipeline.movfn;
+
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.LongPoint;
+import org.apache.lucene.document.NumericDocValuesField;
+import org.apache.lucene.document.SortedNumericDocValuesField;
+import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.RandomIndexWriter;
+import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.MatchAllDocsQuery;
+import org.apache.lucene.search.Query;
+import org.apache.lucene.store.Directory;
+import org.elasticsearch.index.mapper.DateFieldMapper;
+import org.elasticsearch.index.mapper.MappedFieldType;
+import org.elasticsearch.index.mapper.NumberFieldMapper;
+import org.elasticsearch.script.Script;
+import org.elasticsearch.script.ScriptService;
+import org.elasticsearch.search.aggregations.AggregatorTestCase;
+import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramAggregationBuilder;
+import org.elasticsearch.search.aggregations.bucket.histogram.DateHistogramInterval;
+import org.elasticsearch.search.aggregations.bucket.histogram.Histogram;
+import org.elasticsearch.search.aggregations.bucket.histogram.InternalDateHistogram;
+import org.elasticsearch.search.aggregations.metrics.avg.AvgAggregationBuilder;
+import org.elasticsearch.search.aggregations.pipeline.InternalSimpleValue;
+
+import java.io.IOException;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Consumer;
+
+import static org.hamcrest.Matchers.equalTo;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.when;
+
+public class MovFnUnitTests extends AggregatorTestCase {
+
+    private static final String DATE_FIELD = "date";
+    private static final String INSTANT_FIELD = "instant";
+    private static final String VALUE_FIELD = "value_field";
+
+    private static final List<String> datasetTimes = Arrays.asList(
+        "2017-01-01T01:07:45",
+        "2017-01-02T03:43:34",
+        "2017-01-03T04:11:00",
+        "2017-01-04T05:11:31",
+        "2017-01-05T08:24:05",
+        "2017-01-06T13:09:32",
+        "2017-01-07T13:47:43",
+        "2017-01-08T16:14:34",
+        "2017-01-09T17:09:50",
+        "2017-01-10T22:55:46");
+
+    private static final List<Integer> datasetValues = Arrays.asList(1,2,3,4,5,6,7,8,9,10);
+
+    public void testMatchAllDocs() throws IOException {
+        Query query = new MatchAllDocsQuery();
+        Script script = new Script(Script.DEFAULT_SCRIPT_TYPE, "painless", "test", Collections.emptyMap());
+
+        DateHistogramAggregationBuilder aggBuilder = new DateHistogramAggregationBuilder("histo");
+        aggBuilder.dateHistogramInterval(DateHistogramInterval.DAY).field(DATE_FIELD);
+        aggBuilder.subAggregation(new AvgAggregationBuilder("avg").field(VALUE_FIELD));
+        aggBuilder.subAggregation(new MovFnPipelineAggregationBuilder("mov_fn", "avg", script, 3));
+
+        executeTestCase(query, aggBuilder, histogram -> {
+                assertEquals(10, histogram.getBuckets().size());
+                List<? extends Histogram.Bucket> buckets = histogram.getBuckets();
+                for (int i = 0; i < buckets.size(); i++) {
+                    if (i == 0) {
+                        assertThat(((InternalSimpleValue)(buckets.get(i).getAggregations().get("mov_fn"))).value(), equalTo(Double.NaN));
+                    } else {
+                        assertThat(((InternalSimpleValue)(buckets.get(i).getAggregations().get("mov_fn"))).value(), equalTo(((double) i)));
+                    }
+
+                }
+            }, 1000, script);
+    }
+
+
+    @SuppressWarnings("unchecked")
+    private void executeTestCase(Query query,
+                                 DateHistogramAggregationBuilder aggBuilder,
+                                 Consumer<Histogram> verify,
+                                 int maxBucket, Script script) throws IOException {
+
+        try (Directory directory = newDirectory()) {
+            try (RandomIndexWriter indexWriter = new RandomIndexWriter(random(), directory)) {
+                Document document = new Document();
+                int counter = 0;
+                for (String date : datasetTimes) {
+                    if (frequently()) {
+                        indexWriter.commit();
+                    }
+
+                    long instant = asLong(date);
+                    document.add(new SortedNumericDocValuesField(DATE_FIELD, instant));
+                    document.add(new LongPoint(INSTANT_FIELD, instant));
+                    document.add(new NumericDocValuesField(VALUE_FIELD, datasetValues.get(counter)));
+                    indexWriter.addDocument(document);
+                    document.clear();
+                    counter += 1;
+                }
+            }
+
+            ScriptService scriptService = mock(ScriptService.class);
+            MovingFunctionScript.Factory factory = mock(MovingFunctionScript.Factory.class);
+            when(scriptService.compile(script, MovingFunctionScript.CONTEXT)).thenReturn(factory);
+
+            MovingFunctionScript scriptInstance = new MovingFunctionScript() {
+                @Override
+                public double execute(Map<String, Object> params, double[] values) {
+                    assertNotNull(values);
+                    return MovingFunctions.max(values);
+                }
+            };
+
+            when(factory.newInstance()).thenReturn(scriptInstance);
+
+            try (IndexReader indexReader = DirectoryReader.open(directory)) {
+                IndexSearcher indexSearcher = newSearcher(indexReader, true, true);
+
+                DateFieldMapper.Builder builder = new DateFieldMapper.Builder("_name");
+                DateFieldMapper.DateFieldType fieldType = builder.fieldType();
+                fieldType.setHasDocValues(true);
+                fieldType.setName(aggBuilder.field());
+
+                MappedFieldType valueFieldType = new NumberFieldMapper.NumberFieldType(NumberFieldMapper.NumberType.LONG);
+                valueFieldType.setHasDocValues(true);
+                valueFieldType.setName("value_field");
+
+                InternalDateHistogram histogram;
+                histogram = searchAndReduce(indexSearcher, query, aggBuilder, maxBucket, scriptService,
+                    new MappedFieldType[]{fieldType, valueFieldType});
+                verify.accept(histogram);
+            }
+        }
+    }
+
+    private static long asLong(String dateTime) {
+        return DateFieldMapper.DEFAULT_DATE_TIME_FORMATTER.parser().parseDateTime(dateTime).getMillis();
+    }
+}

server/src/test/java/org/elasticsearch/search/aggregations/pipeline/movfn/MovFnWhitelistedFunctionTests.java

@@ -0,0 +1,684 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.search.aggregations.pipeline.movfn;
+
+import org.elasticsearch.common.collect.EvictingQueue;
+import org.elasticsearch.test.ESTestCase;
+
+import java.util.Arrays;
+
+import static org.hamcrest.Matchers.equalTo;
+
+public class MovFnWhitelistedFunctionTests extends ESTestCase {
+
+    public void testWindowMax() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            double randValue = randomDouble();
+            double expected = -Double.MAX_VALUE;
+
+            if (i == 0) {
+                window.offer(randValue);
+                continue;
+            }
+
+            for (double value : window) {
+                expected = Math.max(expected, value);
+            }
+
+            double actual = MovingFunctions.max(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertEquals(expected, actual, 0.01 * Math.abs(expected));
+            window.offer(randValue);
+        }
+    }
+
+    public void testNullWindowMax() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            Double randValue = randomBoolean() ? Double.NaN : null;
+
+            if (i == 0) {
+                if (randValue != null) {
+                    window.offer(randValue);
+                }
+                continue;
+            }
+
+            double actual = MovingFunctions.max(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertThat(actual, equalTo(Double.NaN));
+            if (randValue != null) {
+                window.offer(randValue);
+            }
+        }
+    }
+
+    public void testEmptyWindowMax() {
+        EvictingQueue<Double> window = new EvictingQueue<>(0);
+        double actual = MovingFunctions.max(window.stream().mapToDouble(Double::doubleValue).toArray());
+        assertThat(actual, equalTo(Double.NaN));
+    }
+
+    public void testWindowMin() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            double randValue = randomDouble();
+            double expected = Double.MAX_VALUE;
+
+            if (i == 0) {
+                window.offer(randValue);
+                continue;
+            }
+
+            for (double value : window) {
+                expected = Math.min(expected, value);
+            }
+
+            double actual = MovingFunctions.min(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertEquals(expected, actual, 0.01 * Math.abs(expected));
+            window.offer(randValue);
+        }
+    }
+
+    public void testNullWindowMin() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            Double randValue = randomBoolean() ? Double.NaN : null;
+
+            if (i == 0) {
+                if (randValue != null) {
+                    window.offer(randValue);
+                }
+                continue;
+            }
+
+            double actual = MovingFunctions.min(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertThat(actual, equalTo(Double.NaN));
+            if (randValue != null) {
+                window.offer(randValue);
+            }
+        }
+    }
+
+    public void testEmptyWindowMin() {
+        EvictingQueue<Double> window = new EvictingQueue<>(0);
+        double actual = MovingFunctions.min(window.stream().mapToDouble(Double::doubleValue).toArray());
+        assertThat(actual, equalTo(Double.NaN));
+    }
+
+    public void testWindowSum() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            double randValue = randomDouble();
+            double expected = 0;
+
+            if (i == 0) {
+                window.offer(randValue);
+                continue;
+            }
+
+            for (double value : window) {
+                expected += value;
+            }
+
+            double actual = MovingFunctions.sum(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertEquals(expected, actual, 0.01 * Math.abs(expected));
+            window.offer(randValue);
+        }
+    }
+
+    public void testNullWindowSum() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            Double randValue = randomBoolean() ? Double.NaN : null;
+
+            if (i == 0) {
+                if (randValue != null) {
+                    window.offer(randValue);
+                }
+                continue;
+            }
+
+            double actual = MovingFunctions.sum(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertThat(actual, equalTo(0.0));
+            if (randValue != null) {
+                window.offer(randValue);
+            }
+        }
+    }
+
+    public void testEmptyWindowSum() {
+        EvictingQueue<Double> window = new EvictingQueue<>(0);
+        double actual = MovingFunctions.sum(window.stream().mapToDouble(Double::doubleValue).toArray());
+        assertThat(actual, equalTo(0.0));
+    }
+
+    public void testSimpleMovAvg() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            double randValue = randomDouble();
+            double expected = 0;
+
+            if (i == 0) {
+                window.offer(randValue);
+                continue;
+            }
+
+            for (double value : window) {
+                expected += value;
+            }
+            expected /= window.size();
+
+            double actual = MovingFunctions.unweightedAvg(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertEquals(expected, actual, 0.01 * Math.abs(expected));
+            window.offer(randValue);
+        }
+    }
+
+    public void testNullSimpleMovAvg() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            Double randValue = randomBoolean() ? Double.NaN : null;
+
+            if (i == 0) {
+                if (randValue != null) {
+                    window.offer(randValue);
+                }
+                continue;
+            }
+
+            double actual = MovingFunctions.unweightedAvg(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertThat(actual, equalTo(Double.NaN));
+            if (randValue != null) {
+                window.offer(randValue);
+            }
+        }
+    }
+
+    public void testEmptySimpleMovAvg() {
+        EvictingQueue<Double> window = new EvictingQueue<>(0);
+        double actual = MovingFunctions.unweightedAvg(window.stream().mapToDouble(Double::doubleValue).toArray());
+        assertThat(actual, equalTo(Double.NaN));
+    }
+
+    public void testSimpleMovStdDev() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            double randValue = randomDouble();
+            double mean = 0;
+
+            if (i == 0) {
+                window.offer(randValue);
+                continue;
+            }
+
+            for (double value : window) {
+                mean += value;
+            }
+            mean /= window.size();
+
+            double expected = 0.0;
+            for (double value : window) {
+                expected += Math.pow(value - mean, 2);
+            }
+            expected = Math.sqrt(expected / window.size());
+
+            double actual = MovingFunctions.stdDev(window.stream().mapToDouble(Double::doubleValue).toArray(), mean);
+            assertEquals(expected, actual, 0.01 * Math.abs(expected));
+            window.offer(randValue);
+        }
+    }
+
+    public void testNullSimpleStdDev() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            Double randValue = randomBoolean() ? Double.NaN : null;
+
+            if (i == 0) {
+                if (randValue != null) {
+                    window.offer(randValue);
+                }
+                continue;
+            }
+
+            double actual = MovingFunctions.stdDev(window.stream().mapToDouble(Double::doubleValue).toArray(),
+                MovingFunctions.unweightedAvg(window.stream().mapToDouble(Double::doubleValue).toArray()));
+            assertThat(actual, equalTo(Double.NaN));
+            if (randValue != null) {
+                window.offer(randValue);
+            }
+        }
+    }
+
+    public void testEmptySimpleStdDev() {
+        EvictingQueue<Double> window = new EvictingQueue<>(0);
+        double actual = MovingFunctions.stdDev(window.stream().mapToDouble(Double::doubleValue).toArray(),
+            MovingFunctions.unweightedAvg(window.stream().mapToDouble(Double::doubleValue).toArray()));
+        assertThat(actual, equalTo(Double.NaN));
+    }
+
+    public void testLinearMovAvg() {
+
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+            double randValue = randomDouble();
+
+            if (i == 0) {
+                window.offer(randValue);
+                continue;
+            }
+
+            double avg = 0;
+            long totalWeight = 1;
+            long current = 1;
+
+            for (double value : window) {
+                avg += value * current;
+                totalWeight += current;
+                current += 1;
+            }
+            double expected = avg / totalWeight;
+            double actual = MovingFunctions.linearWeightedAvg(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertEquals(expected, actual, 0.01 * Math.abs(expected));
+            window.offer(randValue);
+        }
+    }
+
+    public void testNullLinearMovAvg() {
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            Double randValue = randomBoolean() ? Double.NaN : null;
+
+            if (i == 0) {
+                if (randValue != null) {
+                    window.offer(randValue);
+                }
+                continue;
+            }
+
+            double actual = MovingFunctions.linearWeightedAvg(window.stream().mapToDouble(Double::doubleValue).toArray());
+            assertThat(actual, equalTo(Double.NaN));
+            if (randValue != null) {
+                window.offer(randValue);
+            }
+        }
+    }
+
+    public void testEmptyLinearMovAvg() {
+        EvictingQueue<Double> window = new EvictingQueue<>(0);
+        double actual = MovingFunctions.linearWeightedAvg(window.stream().mapToDouble(Double::doubleValue).toArray());
+        assertThat(actual, equalTo(Double.NaN));
+    }
+
+    public void testEWMAMovAvg() {
+        double alpha = randomDouble();
+
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+            double randValue = randomDouble();
+
+            if (i == 0) {
+                window.offer(randValue);
+                continue;
+            }
+
+            double avg = 0;
+            boolean first = true;
+
+            for (double value : window) {
+                if (first) {
+                    avg = value;
+                    first = false;
+                } else {
+                    avg = (value * alpha) + (avg * (1 - alpha));
+                }
+            }
+            double expected = avg;
+            double actual = MovingFunctions.ewma(window.stream().mapToDouble(Double::doubleValue).toArray(), alpha);
+            assertEquals(expected, actual, 0.01 * Math.abs(expected));
+            window.offer(randValue);
+        }
+    }
+
+    public void testNullEwmaMovAvg() {
+        double alpha = randomDouble();
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            Double randValue = randomBoolean() ? Double.NaN : null;
+
+            if (i == 0) {
+                if (randValue != null) {
+                    window.offer(randValue);
+                }
+                continue;
+            }
+
+            double actual = MovingFunctions.ewma(window.stream().mapToDouble(Double::doubleValue).toArray(), alpha);
+            assertThat(actual, equalTo(Double.NaN));
+            if (randValue != null) {
+                window.offer(randValue);
+            }
+        }
+    }
+
+    public void testEmptyEwmaMovAvg() {
+        double alpha = randomDouble();
+        EvictingQueue<Double> window = new EvictingQueue<>(0);
+        double actual = MovingFunctions.ewma(window.stream().mapToDouble(Double::doubleValue).toArray(), alpha);
+        assertThat(actual, equalTo(Double.NaN));
+    }
+
+    public void testHoltLinearMovAvg() {
+        double alpha = randomDouble();
+        double beta = randomDouble();
+
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+            double randValue = randomDouble();
+
+            if (i == 0) {
+                window.offer(randValue);
+                continue;
+            }
+
+            double s = 0;
+            double last_s = 0;
+
+            // Trend value
+            double b = 0;
+            double last_b = 0;
+            int counter = 0;
+
+            double last;
+            for (double value : window) {
+                last = value;
+                if (counter == 0) {
+                    s = value;
+                    b = value - last;
+                } else {
+                    s = alpha * value + (1.0d - alpha) * (last_s + last_b);
+                    b = beta * (s - last_s) + (1 - beta) * last_b;
+                }
+
+                counter += 1;
+                last_s = s;
+                last_b = b;
+            }
+
+            double expected = s + (0 * b) ;
+            double actual = MovingFunctions.holt(window.stream().mapToDouble(Double::doubleValue).toArray(), alpha, beta);
+            assertEquals(expected, actual, 0.01 * Math.abs(expected));
+            window.offer(randValue);
+        }
+    }
+
+    public void testNullHoltMovAvg() {
+        double alpha = randomDouble();
+        double beta = randomDouble();
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(1, 50);
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < numValues; i++) {
+
+            Double randValue = randomBoolean() ? Double.NaN : null;
+
+            if (i == 0) {
+                if (randValue != null) {
+                    window.offer(randValue);
+                }
+                continue;
+            }
+
+            double actual = MovingFunctions.holt(window.stream().mapToDouble(Double::doubleValue).toArray(), alpha, beta);
+            assertThat(actual, equalTo(Double.NaN));
+            if (randValue != null) {
+                window.offer(randValue);
+            }
+        }
+    }
+
+    public void testEmptyHoltMovAvg() {
+        double alpha = randomDouble();
+        double beta = randomDouble();
+        EvictingQueue<Double> window = new EvictingQueue<>(0);
+        double actual = MovingFunctions.holt(window.stream().mapToDouble(Double::doubleValue).toArray(), alpha, beta);
+        assertThat(actual, equalTo(Double.NaN));
+    }
+
+    public void testHoltWintersMultiplicative() {
+        double alpha = randomDouble();
+        double beta = randomDouble();
+        double gamma = randomDouble();
+        int period = randomIntBetween(1,10);
+        int windowSize = randomIntBetween(period * 2, 50); // HW requires at least two periods of data
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < windowSize; i++) {
+            window.offer(randomDouble());
+        }
+
+        // Smoothed value
+        double s = 0;
+        double last_s = 0;
+
+        // Trend value
+        double b = 0;
+        double last_b = 0;
+
+        // Seasonal value
+        double[] seasonal = new double[windowSize];
+
+        int counter = 0;
+        double[] vs = new double[windowSize];
+        for (double v : window) {
+            vs[counter] = v + 0.0000000001;
+            counter += 1;
+        }
+
+        // Initial level value is average of first season
+        // Calculate the slopes between first and second season for each period
+        for (int i = 0; i < period; i++) {
+            s += vs[i];
+            b += (vs[i + period] - vs[i]) / period;
+        }
+        s /= period;
+        b /= period;
+        last_s = s;
+
+        // Calculate first seasonal
+        if (Double.compare(s, 0.0) == 0 || Double.compare(s, -0.0) == 0) {
+            Arrays.fill(seasonal, 0.0);
+        } else {
+            for (int i = 0; i < period; i++) {
+                seasonal[i] = vs[i] / s;
+            }
+        }
+
+        for (int i = period; i < vs.length; i++) {
+            s = alpha * (vs[i] / seasonal[i - period]) + (1.0d - alpha) * (last_s + last_b);
+            b = beta * (s - last_s) + (1 - beta) * last_b;
+
+            seasonal[i] = gamma * (vs[i] / (last_s + last_b )) + (1 - gamma) * seasonal[i - period];
+            last_s = s;
+            last_b = b;
+        }
+
+        int idx = window.size() - period + (0 % period);
+        double expected = (s + (1 * b)) * seasonal[idx];
+        double actual = MovingFunctions.holtWinters(window.stream().mapToDouble(Double::doubleValue).toArray(),
+            alpha, beta, gamma, period, true);
+        assertEquals(expected, actual, 0.01 * Math.abs(expected));
+    }
+
+    public void testNullHoltWintersMovAvg() {
+        double alpha = randomDouble();
+        double beta = randomDouble();
+        double gamma = randomDouble();
+        int period = randomIntBetween(1,10);
+        int numValues = randomIntBetween(1, 100);
+        int windowSize = randomIntBetween(period * 2, 50); // HW requires at least two periods of data
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < windowSize; i++) {
+            window.offer(Double.NaN);
+        }
+
+        for (int i = 0; i < numValues; i++) {
+            double actual = MovingFunctions.holtWinters(window.stream().mapToDouble(Double::doubleValue).toArray(),
+                alpha, beta, gamma, period, false);
+            assertThat(actual, equalTo(Double.NaN));
+        }
+    }
+
+    public void testEmptyHoltWintersMovAvg() {
+        double alpha = randomDouble();
+        double beta = randomDouble();
+        double gamma = randomDouble();
+        int period = randomIntBetween(1,10);
+        EvictingQueue<Double> window = new EvictingQueue<>(0);
+        double actual = MovingFunctions.holtWinters(window.stream().mapToDouble(Double::doubleValue).toArray(),
+            alpha, beta, gamma, period, false);
+        assertThat(actual, equalTo(Double.NaN));
+    }
+
+    public void testHoltWintersAdditive() {
+        double alpha = randomDouble();
+        double beta = randomDouble();
+        double gamma = randomDouble();
+        int period = randomIntBetween(1,10);
+
+        int windowSize = randomIntBetween(period * 2, 50); // HW requires at least two periods of data
+
+        EvictingQueue<Double> window = new EvictingQueue<>(windowSize);
+        for (int i = 0; i < windowSize; i++) {
+            window.offer(randomDouble());
+        }
+
+        // Smoothed value
+        double s = 0;
+        double last_s = 0;
+
+        // Trend value
+        double b = 0;
+        double last_b = 0;
+
+        // Seasonal value
+        double[] seasonal = new double[windowSize];
+
+        int counter = 0;
+        double[] vs = new double[windowSize];
+        for (double v : window) {
+            vs[counter] = v;
+            counter += 1;
+        }
+
+        // Initial level value is average of first season
+        // Calculate the slopes between first and second season for each period
+        for (int i = 0; i < period; i++) {
+            s += vs[i];
+            b += (vs[i + period] - vs[i]) / period;
+        }
+        s /= period;
+        b /= period;
+        last_s = s;
+
+        // Calculate first seasonal
+        if (Double.compare(s, 0.0) == 0 || Double.compare(s, -0.0) == 0) {
+            Arrays.fill(seasonal, 0.0);
+        } else {
+            for (int i = 0; i < period; i++) {
+                seasonal[i] = vs[i] / s;
+            }
+        }
+
+        for (int i = period; i < vs.length; i++) {
+            s = alpha * (vs[i] - seasonal[i - period]) + (1.0d - alpha) * (last_s + last_b);
+            b = beta * (s - last_s) + (1 - beta) * last_b;
+
+            seasonal[i] = gamma * (vs[i] - (last_s - last_b )) + (1 - gamma) * seasonal[i - period];
+            last_s = s;
+            last_b = b;
+        }
+
+        int idx = window.size() - period + (0 % period);
+        double expected = s + (1 * b) + seasonal[idx];
+        double actual = MovingFunctions.holtWinters(window.stream().mapToDouble(Double::doubleValue).toArray(),
+            alpha, beta, gamma, period, false);
+        assertEquals(expected, actual, 0.01 * Math.abs(expected));
+    }
+
+}

server/src/test/java/org/elasticsearch/search/aggregations/pipeline/moving/avg/MovAvgIT.java

@@ -312,7 +312,7 @@ public class MovAvgIT extends ESIntegTestCase {
         double last;
         for (double value : window) {
             last = value;
-            if (counter == 1) {
+            if (counter == 0) {
                 s = value;
                 b = value - last;
             } else {

server/src/test/java/org/elasticsearch/search/aggregations/pipeline/moving/avg/MovAvgTests.java

@@ -31,6 +31,8 @@ import org.elasticsearch.search.aggregations.pipeline.movavg.models.HoltWintersM
 import org.elasticsearch.search.aggregations.pipeline.movavg.models.LinearModel;
 import org.elasticsearch.search.aggregations.pipeline.movavg.models.SimpleModel;
 
+import java.io.IOException;
+
 public class MovAvgTests extends BasePipelineAggregationTestCase<MovAvgPipelineAggregationBuilder> {
 
     @Override
@@ -94,6 +96,12 @@ public class MovAvgTests extends BasePipelineAggregationTestCase<MovAvgPipelineA
         return factory;
     }
 
+    @Override
+    public void testFromXContent() throws IOException {
+        super.testFromXContent();
+        assertWarnings("The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.");
+    }
+
     public void testDefaultParsing() throws Exception {
         MovAvgPipelineAggregationBuilder expected = new MovAvgPipelineAggregationBuilder("commits_moving_avg", "commits");
         String json = "{" +
@@ -104,6 +112,7 @@ public class MovAvgTests extends BasePipelineAggregationTestCase<MovAvgPipelineA
             "    }" +
             "}";
         PipelineAggregationBuilder newAgg = parse(createParser(JsonXContent.jsonXContent, json));
+        assertWarnings("The moving_avg aggregation has been deprecated in favor of the moving_fn aggregation.");
         assertNotSame(newAgg, expected);
         assertEquals(expected, newAgg);
         assertEquals(expected.hashCode(), newAgg.hashCode());

server/src/test/java/org/elasticsearch/search/aggregations/pipeline/moving/avg/MovAvgUnitTests.java

@@ -246,7 +246,7 @@ public class MovAvgUnitTests extends ESTestCase {
             double last;
             for (double value : window) {
                 last = value;
-                if (counter == 1) {
+                if (counter == 0) {
                     s = value;
                     b = value - last;
                 } else {
@@ -292,7 +292,7 @@ public class MovAvgUnitTests extends ESTestCase {
         double last;
         for (double value : window) {
             last = value;
-            if (counter == 1) {
+            if (counter == 0) {
                 s = value;
                 b = value - last;
             } else {

server/src/test/java/org/elasticsearch/tasks/ListTasksResponseTests.java

@@ -19,18 +19,33 @@
 
 package org.elasticsearch.tasks;
 
+import org.elasticsearch.ElasticsearchException;
+import org.elasticsearch.action.FailedNodeException;
+import org.elasticsearch.action.TaskOperationFailure;
 import org.elasticsearch.action.admin.cluster.node.tasks.list.ListTasksResponse;
-import org.elasticsearch.test.ESTestCase;
+import org.elasticsearch.common.bytes.BytesReference;
+import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
+import org.elasticsearch.common.xcontent.XContentFactory;
+import org.elasticsearch.common.xcontent.XContentHelper;
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.common.xcontent.XContentType;
+import org.elasticsearch.test.AbstractXContentTestCase;
 
+import java.io.IOException;
+import java.util.ArrayList;
 import java.util.Collections;
+import java.util.List;
+import java.util.Objects;
 
 import static java.util.Collections.emptyList;
 import static java.util.Collections.singletonList;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.notNullValue;
 
-public class ListTasksResponseTests extends ESTestCase {
+public class ListTasksResponseTests extends AbstractXContentTestCase<ListTasksResponse> {
 
     public void testEmptyToString() {
-        assertEquals("{\"tasks\":{}}", new ListTasksResponse().toString());
+        assertEquals("{\"tasks\":[]}", new ListTasksResponse().toString());
     }
 
     public void testNonEmptyToString() {
@@ -38,8 +53,48 @@ public class ListTasksResponseTests extends ESTestCase {
             new TaskId("node1", 1), "dummy-type", "dummy-action", "dummy-description", null, 0, 1, true, new TaskId("node1", 0),
             Collections.singletonMap("foo", "bar"));
         ListTasksResponse tasksResponse = new ListTasksResponse(singletonList(info), emptyList(), emptyList());
-        assertEquals("{\"tasks\":{\"node1:1\":{\"node\":\"node1\",\"id\":1,\"type\":\"dummy-type\",\"action\":\"dummy-action\","
+        assertEquals("{\"tasks\":[{\"node\":\"node1\",\"id\":1,\"type\":\"dummy-type\",\"action\":\"dummy-action\","
                 + "\"description\":\"dummy-description\",\"start_time_in_millis\":0,\"running_time_in_nanos\":1,\"cancellable\":true,"
-                + "\"parent_task_id\":\"node1:0\",\"headers\":{\"foo\":\"bar\"}}}}", tasksResponse.toString());
+                + "\"parent_task_id\":\"node1:0\",\"headers\":{\"foo\":\"bar\"}}]}", tasksResponse.toString());
+    }
+
+    @Override
+    protected ListTasksResponse createTestInstance() {
+        List<TaskInfo> tasks = new ArrayList<>();
+        for (int i = 0; i < randomInt(10); i++) {
+            tasks.add(TaskInfoTests.randomTaskInfo());
+        }
+        List<TaskOperationFailure> taskFailures = new ArrayList<>();
+        for (int i = 0; i < randomInt(5); i++) {
+            taskFailures.add(new TaskOperationFailure(
+                    randomAlphaOfLength(5), randomNonNegativeLong(), new IllegalStateException("message")));
+        }
+        return new ListTasksResponse(tasks, taskFailures, Collections.singletonList(new FailedNodeException("", "message", null)));
+    }
+
+    @Override
+    protected ListTasksResponse doParseInstance(XContentParser parser) throws IOException {
+        return ListTasksResponse.fromXContent(parser);
+    }
+
+    @Override
+    protected boolean supportsUnknownFields() {
+        return false;
+    }
+
+    @Override
+    protected void assertEqualInstances(ListTasksResponse expectedInstance, ListTasksResponse newInstance) {
+        assertNotSame(expectedInstance, newInstance);
+        assertThat(newInstance.getTasks(), equalTo(expectedInstance.getTasks()));
+        assertThat(newInstance.getNodeFailures().size(), equalTo(1));
+        for (ElasticsearchException failure : newInstance.getNodeFailures()) {
+            assertThat(failure, notNullValue());
+            assertThat(failure.getMessage(), equalTo("Elasticsearch exception [type=failed_node_exception, reason=message]"));
+        }
+    }
+
+    @Override
+    protected boolean assertToXContentEquivalence() {
+        return false;
     }
 }

server/src/test/java/org/elasticsearch/tasks/TaskInfoTests.java

@@ -0,0 +1,156 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.tasks;
+
+import org.elasticsearch.client.Requests;
+import org.elasticsearch.common.bytes.BytesReference;
+import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
+import org.elasticsearch.common.io.stream.Writeable;
+import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.test.AbstractSerializingTestCase;
+
+import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Predicate;
+
+public class TaskInfoTests extends AbstractSerializingTestCase<TaskInfo> {
+
+    @Override
+    protected TaskInfo doParseInstance(XContentParser parser) {
+        return TaskInfo.fromXContent(parser);
+    }
+
+    @Override
+    protected TaskInfo createTestInstance() {
+        return randomTaskInfo();
+    }
+
+    @Override
+    protected Writeable.Reader<TaskInfo> instanceReader() {
+        return TaskInfo::new;
+    }
+
+    @Override
+    protected NamedWriteableRegistry getNamedWriteableRegistry() {
+        return new NamedWriteableRegistry(Collections.singletonList(
+                new NamedWriteableRegistry.Entry(Task.Status.class, RawTaskStatus.NAME, RawTaskStatus::new)));
+    }
+
+    @Override
+    protected boolean supportsUnknownFields() {
+        return true;
+    }
+
+    @Override
+    protected Predicate<String> getRandomFieldsExcludeFilter() {
+        return field -> "status".equals(field) || "headers".equals(field);
+    }
+
+    @Override
+    protected TaskInfo mutateInstance(TaskInfo info) throws IOException {
+        switch (between(0, 9)) {
+            case 0:
+                TaskId taskId = new TaskId(info.getTaskId().getNodeId() + randomAlphaOfLength(5), info.getTaskId().getId());
+                return new TaskInfo(taskId, info.getType(), info.getAction(), info.getDescription(), info.getStatus(),
+                    info.getStartTime(), info.getRunningTimeNanos(), info.isCancellable(), info.getParentTaskId(), info.getHeaders());
+            case 1:
+                return new TaskInfo(info.getTaskId(), info.getType() + randomAlphaOfLength(5), info.getAction(), info.getDescription(),
+                    info.getStatus(), info.getStartTime(), info.getRunningTimeNanos(), info.isCancellable(), info.getParentTaskId(),
+                    info.getHeaders());
+            case 2:
+                return new TaskInfo(info.getTaskId(), info.getType(), info.getAction() + randomAlphaOfLength(5), info.getDescription(),
+                    info.getStatus(), info.getStartTime(), info.getRunningTimeNanos(), info.isCancellable(), info.getParentTaskId(),
+                    info.getHeaders());
+            case 3:
+                return new TaskInfo(info.getTaskId(), info.getType(), info.getAction(), info.getDescription() + randomAlphaOfLength(5),
+                    info.getStatus(), info.getStartTime(), info.getRunningTimeNanos(), info.isCancellable(), info.getParentTaskId(),
+                    info.getHeaders());
+            case 4:
+                Task.Status newStatus = randomValueOtherThan(info.getStatus(), TaskInfoTests::randomRawTaskStatus);
+                return new TaskInfo(info.getTaskId(), info.getType(), info.getAction(), info.getDescription(), newStatus,
+                    info.getStartTime(), info.getRunningTimeNanos(), info.isCancellable(), info.getParentTaskId(), info.getHeaders());
+            case 5:
+                return new TaskInfo(info.getTaskId(), info.getType(), info.getAction(), info.getDescription(), info.getStatus(),
+                    info.getStartTime() + between(1, 100), info.getRunningTimeNanos(), info.isCancellable(), info.getParentTaskId(),
+                    info.getHeaders());
+            case 6:
+                return new TaskInfo(info.getTaskId(), info.getType(), info.getAction(), info.getDescription(), info.getStatus(),
+                    info.getStartTime(), info.getRunningTimeNanos() + between(1, 100), info.isCancellable(), info.getParentTaskId(),
+                    info.getHeaders());
+            case 7:
+                return new TaskInfo(info.getTaskId(), info.getType(), info.getAction(), info.getDescription(), info.getStatus(),
+                    info.getStartTime(), info.getRunningTimeNanos(), info.isCancellable() == false, info.getParentTaskId(),
+                    info.getHeaders());
+            case 8:
+                TaskId parentId = new TaskId(info.getParentTaskId().getNodeId() + randomAlphaOfLength(5), info.getParentTaskId().getId());
+                return new TaskInfo(info.getTaskId(), info.getType(), info.getAction(), info.getDescription(), info.getStatus(),
+                    info.getStartTime(), info.getRunningTimeNanos(), info.isCancellable(), parentId, info.getHeaders());
+            case 9:
+                Map<String, String> headers = info.getHeaders();
+                if (headers == null) {
+                    headers = new HashMap<>(1);
+                } else {
+                    headers = new HashMap<>(info.getHeaders());
+                }
+                headers.put(randomAlphaOfLength(15), randomAlphaOfLength(15));
+                return new TaskInfo(info.getTaskId(), info.getType(), info.getAction(), info.getDescription(), info.getStatus(),
+                    info.getStartTime(), info.getRunningTimeNanos(), info.isCancellable(), info.getParentTaskId(), headers);
+            default:
+                throw new IllegalStateException();
+        }
+    }
+
+    static TaskInfo randomTaskInfo() {
+        TaskId taskId = randomTaskId();
+        String type = randomAlphaOfLength(5);
+        String action = randomAlphaOfLength(5);
+        Task.Status status = randomBoolean() ? randomRawTaskStatus() : null;
+        String description = randomBoolean() ? randomAlphaOfLength(5) : null;
+        long startTime = randomLong();
+        long runningTimeNanos = randomLong();
+        boolean cancellable = randomBoolean();
+        TaskId parentTaskId = randomBoolean() ? TaskId.EMPTY_TASK_ID : randomTaskId();
+        Map<String, String> headers = randomBoolean() ?
+                Collections.emptyMap() :
+                Collections.singletonMap(randomAlphaOfLength(5), randomAlphaOfLength(5));
+        return new TaskInfo(taskId, type, action, description, status, startTime, runningTimeNanos, cancellable, parentTaskId, headers);
+    }
+
+    private static TaskId randomTaskId() {
+        return new TaskId(randomAlphaOfLength(5), randomLong());
+    }
+
+    private static RawTaskStatus randomRawTaskStatus() {
+        try (XContentBuilder builder = XContentBuilder.builder(Requests.INDEX_CONTENT_TYPE.xContent())) {
+            builder.startObject();
+            int fields = between(0, 10);
+            for (int f = 0; f < fields; f++) {
+                builder.field(randomAlphaOfLength(5), randomAlphaOfLength(5));
+            }
+            builder.endObject();
+            return new RawTaskStatus(BytesReference.bytes(builder));
+        } catch (IOException e) {
+            throw new IllegalStateException(e);
+        }
+    }
+}

server/src/test/java/org/elasticsearch/tasks/TaskResultTests.java

@@ -19,8 +19,6 @@
 
 package org.elasticsearch.tasks;
 
-import org.elasticsearch.client.Requests;
-import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.io.stream.NamedWriteableAwareStreamInput;
 import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
@@ -37,6 +35,8 @@ import java.util.Collections;
 import java.util.Map;
 import java.util.TreeMap;
 
+import static org.elasticsearch.tasks.TaskInfoTests.randomTaskInfo;
+
 /**
  * Round trip tests for {@link TaskResult} and those classes that it includes like {@link TaskInfo} and {@link RawTaskStatus}.
  */
@@ -125,37 +125,6 @@ public class TaskResultTests extends ESTestCase {
         }
     }
 
-    private static TaskInfo randomTaskInfo() throws IOException {
-        TaskId taskId = randomTaskId();
-        String type = randomAlphaOfLength(5);
-        String action = randomAlphaOfLength(5);
-        Task.Status status = randomBoolean() ? randomRawTaskStatus() : null;
-        String description = randomBoolean() ? randomAlphaOfLength(5) : null;
-        long startTime = randomLong();
-        long runningTimeNanos = randomLong();
-        boolean cancellable = randomBoolean();
-        TaskId parentTaskId = randomBoolean() ? TaskId.EMPTY_TASK_ID : randomTaskId();
-        Map<String, String> headers =
-            randomBoolean() ? Collections.emptyMap() : Collections.singletonMap(randomAlphaOfLength(5), randomAlphaOfLength(5));
-        return new TaskInfo(taskId, type, action, description, status, startTime, runningTimeNanos, cancellable, parentTaskId, headers);
-    }
-
-    private static TaskId randomTaskId() {
-        return new TaskId(randomAlphaOfLength(5), randomLong());
-    }
-
-    private static RawTaskStatus randomRawTaskStatus() throws IOException {
-        try (XContentBuilder builder = XContentBuilder.builder(Requests.INDEX_CONTENT_TYPE.xContent())) {
-            builder.startObject();
-            int fields = between(0, 10);
-            for (int f = 0; f < fields; f++) {
-                builder.field(randomAlphaOfLength(5), randomAlphaOfLength(5));
-            }
-            builder.endObject();
-            return new RawTaskStatus(BytesReference.bytes(builder));
-        }
-    }
-
     private static ToXContent randomTaskResponse() {
         Map<String, String> result = new TreeMap<>();
         int fields = between(0, 10);

test/framework/src/main/java/org/elasticsearch/script/MockScriptEngine.java

@@ -26,6 +26,8 @@ import org.elasticsearch.index.similarity.ScriptedSimilarity.Field;
 import org.elasticsearch.index.similarity.ScriptedSimilarity.Query;
 import org.elasticsearch.index.similarity.ScriptedSimilarity.Term;
 import org.elasticsearch.index.similarity.SimilarityService;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctionScript;
+import org.elasticsearch.search.aggregations.pipeline.movfn.MovingFunctions;
 import org.elasticsearch.search.lookup.LeafSearchLookup;
 import org.elasticsearch.search.lookup.SearchLookup;
 
@@ -109,6 +111,9 @@ public class MockScriptEngine implements ScriptEngine {
         } else if (context.instanceClazz.equals(SimilarityWeightScript.class)) {
             SimilarityWeightScript.Factory factory = mockCompiled::createSimilarityWeightScript;
             return context.factoryClazz.cast(factory);
+        } else if (context.instanceClazz.equals(MovingFunctionScript.class)) {
+            MovingFunctionScript.Factory factory = mockCompiled::createMovingFunctionScript;
+            return context.factoryClazz.cast(factory);
         }
         throw new IllegalArgumentException("mock script engine does not know how to handle context [" + context.name + "]");
     }
@@ -169,6 +174,10 @@ public class MockScriptEngine implements ScriptEngine {
         public SimilarityWeightScript createSimilarityWeightScript() {
             return new MockSimilarityWeightScript(script != null ? script : ctx -> 42d);
         }
+
+        public MovingFunctionScript createMovingFunctionScript() {
+            return new MockMovingFunctionScript();
+        }
     }
 
     public class MockExecutableScript implements ExecutableScript {
@@ -327,4 +336,11 @@ public class MockScriptEngine implements ScriptEngine {
         return new Script(ScriptType.INLINE, "mock", script, emptyMap());
     }
 
+    public class MockMovingFunctionScript extends MovingFunctionScript {
+        @Override
+        public double execute(Map<String, Object> params, double[] values) {
+            return MovingFunctions.unweightedAvg(values);
+        }
+    }
+
 }

test/framework/src/main/java/org/elasticsearch/search/aggregations/AggregatorTestCase.java

@@ -61,8 +61,11 @@ import org.elasticsearch.indices.breaker.CircuitBreakerService;
 import org.elasticsearch.indices.breaker.NoneCircuitBreakerService;
 import org.elasticsearch.indices.fielddata.cache.IndicesFieldDataCache;
 import org.elasticsearch.mock.orig.Mockito;
-import org.elasticsearch.search.aggregations.MultiBucketConsumerService.MultiBucketConsumer;
+import org.elasticsearch.script.ScriptService;
+import org.elasticsearch.search.aggregations.bucket.MultiBucketsAggregation;
 import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
+import org.elasticsearch.search.aggregations.pipeline.PipelineAggregatorBuilders;
+import org.elasticsearch.search.aggregations.pipeline.SiblingPipelineAggregator;
 import org.elasticsearch.search.fetch.FetchPhase;
 import org.elasticsearch.search.fetch.subphase.DocValueFieldsFetchSubPhase;
 import org.elasticsearch.search.fetch.subphase.FetchSourceSubPhase;
@@ -302,7 +305,7 @@ public abstract class AggregatorTestCase extends ESTestCase {
                                                                                       Query query,
                                                                                       AggregationBuilder builder,
                                                                                       MappedFieldType... fieldTypes) throws IOException {
-        return searchAndReduce(searcher, query, builder, DEFAULT_MAX_BUCKETS, fieldTypes);
+        return searchAndReduce(searcher, query, builder, DEFAULT_MAX_BUCKETS, null, fieldTypes);
     }
 
     /**
@@ -314,6 +317,7 @@ public abstract class AggregatorTestCase extends ESTestCase {
                                                                                       Query query,
                                                                                       AggregationBuilder builder,
                                                                                       int maxBucket,
+                                                                                      ScriptService scriptService,
                                                                                       MappedFieldType... fieldTypes) throws IOException {
         final IndexReaderContext ctx = searcher.getTopReaderContext();
 
@@ -368,7 +372,7 @@ public abstract class AggregatorTestCase extends ESTestCase {
             // now do the final reduce
             MultiBucketConsumer reduceBucketConsumer = new MultiBucketConsumer(maxBucket);
             InternalAggregation.ReduceContext context =
-                new InternalAggregation.ReduceContext(root.context().bigArrays(), null, reduceBucketConsumer, true);
+                new InternalAggregation.ReduceContext(root.context().bigArrays(), scriptService, reduceBucketConsumer, true);
 
             @SuppressWarnings("unchecked")
             A internalAgg = (A) aggs.get(0).doReduce(aggs, context);

test/framework/src/main/java/org/elasticsearch/search/aggregations/BaseAggregationTestCase.java

@@ -38,6 +38,7 @@ import org.elasticsearch.plugins.PluginsService;
 import org.elasticsearch.plugins.SearchPlugin;
 import org.elasticsearch.search.SearchModule;
 import org.elasticsearch.search.aggregations.support.ValuesSourceAggregationBuilder;
+import org.elasticsearch.test.AbstractBuilderTestCase;
 import org.elasticsearch.test.AbstractQueryTestCase;
 import org.elasticsearch.test.ESTestCase;
 
@@ -50,60 +51,12 @@ import java.util.List;
 import static org.elasticsearch.test.EqualsHashCodeTestUtils.checkEqualsAndHashCode;
 import static org.hamcrest.Matchers.hasSize;
 
-public abstract class BaseAggregationTestCase<AB extends AbstractAggregationBuilder<AB>> extends ESTestCase {
+public abstract class BaseAggregationTestCase<AB extends AbstractAggregationBuilder<AB>> extends AbstractBuilderTestCase {
 
-    protected static final String STRING_FIELD_NAME = "mapped_string";
-    protected static final String INT_FIELD_NAME = "mapped_int";
-    protected static final String DOUBLE_FIELD_NAME = "mapped_double";
-    protected static final String BOOLEAN_FIELD_NAME = "mapped_boolean";
-    protected static final String DATE_FIELD_NAME = "mapped_date";
     protected static final String IP_FIELD_NAME = "mapped_ip";
 
-    private String[] currentTypes;
-
-    protected String[] getCurrentTypes() {
-        return currentTypes;
-    }
-
-    private NamedWriteableRegistry namedWriteableRegistry;
-    private NamedXContentRegistry xContentRegistry;
     protected abstract AB createTestAggregatorBuilder();
 
-    protected Collection<Class<? extends Plugin>> getPlugins() {
-        return Collections.emptyList();
-    }
-
-    /**
-     * Setup for the whole base test class.
-     */
-    @Override
-    public void setUp() throws Exception {
-        super.setUp();
-        Settings settings = Settings.builder()
-            .put("node.name", AbstractQueryTestCase.class.toString())
-            .put(Environment.PATH_HOME_SETTING.getKey(), createTempDir())
-            .build();
-        IndicesModule indicesModule = new IndicesModule(Collections.emptyList());
-        PluginsService pluginsService = new PluginsService(settings, null, null, null, getPlugins());
-        SearchModule searchModule = new SearchModule(settings, false, pluginsService.filterPlugins(SearchPlugin.class));
-        List<NamedWriteableRegistry.Entry> entries = new ArrayList<>();
-        entries.addAll(indicesModule.getNamedWriteables());
-        entries.addAll(searchModule.getNamedWriteables());
-        namedWriteableRegistry = new NamedWriteableRegistry(entries);
-        xContentRegistry = new NamedXContentRegistry(searchModule.getNamedXContents());
-        //create some random type with some default field, those types will stick around for all of the subclasses
-        currentTypes = new String[randomIntBetween(0, 5)];
-        for (int i = 0; i < currentTypes.length; i++) {
-            String type = randomAlphaOfLengthBetween(1, 10);
-            currentTypes[i] = type;
-        }
-    }
-
-    @Override
-    protected NamedXContentRegistry xContentRegistry() {
-        return xContentRegistry;
-    }
-
     /**
      * Generic test that creates new AggregatorFactory from the test
      * AggregatorFactory and checks both for equality and asserts equality on
@@ -157,7 +110,7 @@ public abstract class BaseAggregationTestCase<AB extends AbstractAggregationBuil
         AB testAgg = createTestAggregatorBuilder();
         try (BytesStreamOutput output = new BytesStreamOutput()) {
             output.writeNamedWriteable(testAgg);
-            try (StreamInput in = new NamedWriteableAwareStreamInput(output.bytes().streamInput(), namedWriteableRegistry)) {
+            try (StreamInput in = new NamedWriteableAwareStreamInput(output.bytes().streamInput(), namedWriteableRegistry())) {
                 AggregationBuilder deserialized = in.readNamedWriteable(AggregationBuilder.class);
                 assertEquals(testAgg, deserialized);
                 assertEquals(testAgg.hashCode(), deserialized.hashCode());
@@ -181,12 +134,12 @@ public abstract class BaseAggregationTestCase<AB extends AbstractAggregationBuil
 
     // we use the streaming infra to create a copy of the query provided as
     // argument
-    private AB copyAggregation(AB agg) throws IOException {
+    protected AB copyAggregation(AB agg) throws IOException {
         try (BytesStreamOutput output = new BytesStreamOutput()) {
             agg.writeTo(output);
-            try (StreamInput in = new NamedWriteableAwareStreamInput(output.bytes().streamInput(), namedWriteableRegistry)) {
+            try (StreamInput in = new NamedWriteableAwareStreamInput(output.bytes().streamInput(), namedWriteableRegistry())) {
                 @SuppressWarnings("unchecked")
-                AB secondAgg = (AB) namedWriteableRegistry.getReader(AggregationBuilder.class, agg.getWriteableName()).read(in);
+                AB secondAgg = (AB) namedWriteableRegistry().getReader(AggregationBuilder.class, agg.getWriteableName()).read(in);
                 return secondAgg;
             }
         }

test/framework/src/main/java/org/elasticsearch/test/AbstractBuilderTestCase.java

@@ -0,0 +1,399 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.test;
+
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.util.Accountable;
+import org.elasticsearch.Version;
+import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;
+import org.elasticsearch.action.get.GetRequest;
+import org.elasticsearch.action.get.GetResponse;
+import org.elasticsearch.action.support.PlainActionFuture;
+import org.elasticsearch.action.termvectors.MultiTermVectorsRequest;
+import org.elasticsearch.action.termvectors.MultiTermVectorsResponse;
+import org.elasticsearch.client.Client;
+import org.elasticsearch.cluster.metadata.IndexMetaData;
+import org.elasticsearch.cluster.metadata.MetaData;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.common.compress.CompressedXContent;
+import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
+import org.elasticsearch.common.settings.IndexScopedSettings;
+import org.elasticsearch.common.settings.Setting;
+import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.settings.SettingsModule;
+import org.elasticsearch.common.xcontent.NamedXContentRegistry;
+import org.elasticsearch.core.internal.io.IOUtils;
+import org.elasticsearch.env.Environment;
+import org.elasticsearch.env.TestEnvironment;
+import org.elasticsearch.index.Index;
+import org.elasticsearch.index.IndexSettings;
+import org.elasticsearch.index.analysis.IndexAnalyzers;
+import org.elasticsearch.index.cache.bitset.BitsetFilterCache;
+import org.elasticsearch.index.fielddata.IndexFieldData;
+import org.elasticsearch.index.fielddata.IndexFieldDataCache;
+import org.elasticsearch.index.fielddata.IndexFieldDataService;
+import org.elasticsearch.index.mapper.MappedFieldType;
+import org.elasticsearch.index.mapper.MapperService;
+import org.elasticsearch.index.query.QueryShardContext;
+import org.elasticsearch.index.shard.ShardId;
+import org.elasticsearch.index.similarity.SimilarityService;
+import org.elasticsearch.indices.IndicesModule;
+import org.elasticsearch.indices.analysis.AnalysisModule;
+import org.elasticsearch.indices.breaker.NoneCircuitBreakerService;
+import org.elasticsearch.indices.fielddata.cache.IndicesFieldDataCache;
+import org.elasticsearch.indices.mapper.MapperRegistry;
+import org.elasticsearch.node.InternalSettingsPreparer;
+import org.elasticsearch.plugins.MapperPlugin;
+import org.elasticsearch.plugins.Plugin;
+import org.elasticsearch.plugins.PluginsService;
+import org.elasticsearch.plugins.ScriptPlugin;
+import org.elasticsearch.plugins.SearchPlugin;
+import org.elasticsearch.script.ScriptModule;
+import org.elasticsearch.script.ScriptService;
+import org.elasticsearch.search.SearchModule;
+import org.elasticsearch.search.internal.SearchContext;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+
+import java.io.Closeable;
+import java.io.IOException;
+import java.lang.reflect.InvocationHandler;
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+import java.util.ArrayList;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.List;
+import java.util.concurrent.ExecutionException;
+import java.util.function.Function;
+import java.util.stream.Stream;
+
+import static java.util.Collections.emptyList;
+import static java.util.stream.Collectors.toList;
+
+public abstract class AbstractBuilderTestCase extends ESTestCase {
+
+    public static final String STRING_FIELD_NAME = "mapped_string";
+    protected static final String STRING_FIELD_NAME_2 = "mapped_string_2";
+    protected static final String INT_FIELD_NAME = "mapped_int";
+    protected static final String INT_RANGE_FIELD_NAME = "mapped_int_range";
+    protected static final String DOUBLE_FIELD_NAME = "mapped_double";
+    protected static final String BOOLEAN_FIELD_NAME = "mapped_boolean";
+    protected static final String DATE_FIELD_NAME = "mapped_date";
+    protected static final String DATE_RANGE_FIELD_NAME = "mapped_date_range";
+    protected static final String OBJECT_FIELD_NAME = "mapped_object";
+    protected static final String GEO_POINT_FIELD_NAME = "mapped_geo_point";
+    protected static final String GEO_SHAPE_FIELD_NAME = "mapped_geo_shape";
+    protected static final String[] MAPPED_FIELD_NAMES = new String[]{STRING_FIELD_NAME, INT_FIELD_NAME, INT_RANGE_FIELD_NAME,
+            DOUBLE_FIELD_NAME, BOOLEAN_FIELD_NAME, DATE_FIELD_NAME, DATE_RANGE_FIELD_NAME, OBJECT_FIELD_NAME, GEO_POINT_FIELD_NAME,
+            GEO_SHAPE_FIELD_NAME};
+    protected static final String[] MAPPED_LEAF_FIELD_NAMES = new String[]{STRING_FIELD_NAME, INT_FIELD_NAME, INT_RANGE_FIELD_NAME,
+            DOUBLE_FIELD_NAME, BOOLEAN_FIELD_NAME, DATE_FIELD_NAME, DATE_RANGE_FIELD_NAME,  GEO_POINT_FIELD_NAME, };
+
+    protected static Version indexVersionCreated;
+
+    private static ServiceHolder serviceHolder;
+    private static int queryNameId = 0;
+    private static Settings nodeSettings;
+    private static Index index;
+    private static String[] currentTypes;
+    protected static String[] randomTypes;
+
+    protected static Index getIndex() {
+        return index;
+    }
+
+    protected static String[] getCurrentTypes() {
+        return currentTypes;
+    }
+
+    protected Collection<Class<? extends Plugin>> getPlugins() {
+        return Collections.emptyList();
+    }
+
+    protected void initializeAdditionalMappings(MapperService mapperService) throws IOException {
+    }
+
+    @BeforeClass
+    public static void beforeClass() {
+        nodeSettings = Settings.builder()
+                .put("node.name", AbstractQueryTestCase.class.toString())
+                .put(Environment.PATH_HOME_SETTING.getKey(), createTempDir())
+                .build();
+
+        index = new Index(randomAlphaOfLengthBetween(1, 10), "_na_");
+
+        // Set a single type in the index
+        switch (random().nextInt(3)) {
+        case 0:
+            currentTypes = new String[0]; // no types
+            break;
+        default:
+            currentTypes = new String[] { "_doc" };
+            break;
+        }
+        randomTypes = getRandomTypes();
+    }
+
+    private static String[] getRandomTypes() {
+        String[] types;
+        if (currentTypes.length > 0 && randomBoolean()) {
+            int numberOfQueryTypes = randomIntBetween(1, currentTypes.length);
+            types = new String[numberOfQueryTypes];
+            for (int i = 0; i < numberOfQueryTypes; i++) {
+                types[i] = randomFrom(currentTypes);
+            }
+        } else {
+            if (randomBoolean()) {
+                types = new String[]{MetaData.ALL};
+            } else {
+                types = new String[0];
+            }
+        }
+        return types;
+    }
+
+    @Override
+    protected NamedXContentRegistry xContentRegistry() {
+        return serviceHolder.xContentRegistry;
+    }
+
+    protected NamedWriteableRegistry namedWriteableRegistry() {
+        return serviceHolder.namedWriteableRegistry;
+    }
+
+    /**
+     * make sure query names are unique by suffixing them with increasing counter
+     */
+    protected static String createUniqueRandomName() {
+        String queryName = randomAlphaOfLengthBetween(1, 10) + queryNameId;
+        queryNameId++;
+        return queryName;
+    }
+
+    protected Settings indexSettings() {
+        // we have to prefer CURRENT since with the range of versions we support it's rather unlikely to get the current actually.
+        indexVersionCreated = randomBoolean() ? Version.CURRENT
+                : VersionUtils.randomVersionBetween(random(), null, Version.CURRENT);
+        return Settings.builder()
+            .put(IndexMetaData.SETTING_VERSION_CREATED, indexVersionCreated)
+            .build();
+    }
+
+    @AfterClass
+    public static void afterClass() throws Exception {
+        IOUtils.close(serviceHolder);
+        serviceHolder = null;
+    }
+
+    @Before
+    public void beforeTest() throws IOException {
+        if (serviceHolder == null) {
+            serviceHolder = new ServiceHolder(nodeSettings, indexSettings(), getPlugins(), this);
+        }
+        serviceHolder.clientInvocationHandler.delegate = this;
+    }
+
+    protected static SearchContext getSearchContext(String[] types, QueryShardContext context) {
+        TestSearchContext testSearchContext = new TestSearchContext(context) {
+            @Override
+            public MapperService mapperService() {
+                return serviceHolder.mapperService; // need to build / parse inner hits sort fields
+            }
+
+            @Override
+            public <IFD extends IndexFieldData<?>> IFD getForField(MappedFieldType fieldType) {
+                return serviceHolder.indexFieldDataService.getForField(fieldType); // need to build / parse inner hits sort fields
+            }
+
+        };
+        testSearchContext.getQueryShardContext().setTypes(types);
+        return testSearchContext;
+    }
+
+    @After
+    public void afterTest() {
+        serviceHolder.clientInvocationHandler.delegate = null;
+    }
+
+    /**
+     * Override this to handle {@link Client#get(GetRequest)} calls from parsers / builders
+     */
+    protected GetResponse executeGet(GetRequest getRequest) {
+        throw new UnsupportedOperationException("this test can't handle GET requests");
+    }
+
+    /**
+     * Override this to handle {@link Client#get(GetRequest)} calls from parsers / builders
+     */
+    protected MultiTermVectorsResponse executeMultiTermVectors(MultiTermVectorsRequest mtvRequest) {
+        throw new UnsupportedOperationException("this test can't handle MultiTermVector requests");
+    }
+
+    /**
+     * @return a new {@link QueryShardContext} with the provided reader
+     */
+    protected static QueryShardContext createShardContext(IndexReader reader) {
+        return serviceHolder.createShardContext(reader);
+    }
+
+    /**
+     * @return a new {@link QueryShardContext} based on the base test index and queryParserService
+     */
+    protected static QueryShardContext createShardContext() {
+        return createShardContext(null);
+    }
+
+    private static class ClientInvocationHandler implements InvocationHandler {
+        AbstractBuilderTestCase delegate;
+
+        @Override
+        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
+            if (method.equals(Client.class.getMethod("get", GetRequest.class, ActionListener.class))){
+                GetResponse getResponse = delegate.executeGet((GetRequest) args[0]);
+                ActionListener<GetResponse> listener = (ActionListener<GetResponse>) args[1];
+                if (randomBoolean()) {
+                    listener.onResponse(getResponse);
+                } else {
+                    new Thread(() -> listener.onResponse(getResponse)).start();
+                }
+                return null;
+            } else if (method.equals(Client.class.getMethod
+                ("multiTermVectors", MultiTermVectorsRequest.class))) {
+                return new PlainActionFuture<MultiTermVectorsResponse>() {
+                    @Override
+                    public MultiTermVectorsResponse get() throws InterruptedException, ExecutionException {
+                        return delegate.executeMultiTermVectors((MultiTermVectorsRequest) args[0]);
+                    }
+                };
+            } else if (method.equals(Object.class.getMethod("toString"))) {
+                return "MockClient";
+            }
+            throw new UnsupportedOperationException("this test can't handle calls to: " + method);
+        }
+
+    }
+
+    private static class ServiceHolder implements Closeable {
+        private final IndexFieldDataService indexFieldDataService;
+        private final SearchModule searchModule;
+        private final NamedWriteableRegistry namedWriteableRegistry;
+        private final NamedXContentRegistry xContentRegistry;
+        private final ClientInvocationHandler clientInvocationHandler = new ClientInvocationHandler();
+        private final IndexSettings idxSettings;
+        private final SimilarityService similarityService;
+        private final MapperService mapperService;
+        private final BitsetFilterCache bitsetFilterCache;
+        private final ScriptService scriptService;
+        private final Client client;
+        private final long nowInMillis = randomNonNegativeLong();
+
+        ServiceHolder(Settings nodeSettings, Settings indexSettings,
+                      Collection<Class<? extends Plugin>> plugins, AbstractBuilderTestCase testCase) throws IOException {
+            Environment env = InternalSettingsPreparer.prepareEnvironment(nodeSettings);
+            PluginsService pluginsService;
+            pluginsService = new PluginsService(nodeSettings, null, env.modulesFile(), env.pluginsFile(), plugins);
+
+            client = (Client) Proxy.newProxyInstance(
+                    Client.class.getClassLoader(),
+                    new Class[]{Client.class},
+                    clientInvocationHandler);
+            ScriptModule scriptModule = createScriptModule(pluginsService.filterPlugins(ScriptPlugin.class));
+            List<Setting<?>> additionalSettings = pluginsService.getPluginSettings();
+            additionalSettings.add(InternalSettingsPlugin.VERSION_CREATED);
+            SettingsModule settingsModule = new SettingsModule(nodeSettings, additionalSettings, pluginsService.getPluginSettingsFilter());
+            searchModule = new SearchModule(nodeSettings, false, pluginsService.filterPlugins(SearchPlugin.class));
+            IndicesModule indicesModule = new IndicesModule(pluginsService.filterPlugins(MapperPlugin.class));
+            List<NamedWriteableRegistry.Entry> entries = new ArrayList<>();
+            entries.addAll(indicesModule.getNamedWriteables());
+            entries.addAll(searchModule.getNamedWriteables());
+            namedWriteableRegistry = new NamedWriteableRegistry(entries);
+            xContentRegistry = new NamedXContentRegistry(Stream.of(
+                    searchModule.getNamedXContents().stream()
+                    ).flatMap(Function.identity()).collect(toList()));
+            IndexScopedSettings indexScopedSettings = settingsModule.getIndexScopedSettings();
+            idxSettings = IndexSettingsModule.newIndexSettings(index, indexSettings, indexScopedSettings);
+            AnalysisModule analysisModule = new AnalysisModule(TestEnvironment.newEnvironment(nodeSettings), emptyList());
+            IndexAnalyzers indexAnalyzers = analysisModule.getAnalysisRegistry().build(idxSettings);
+            scriptService = scriptModule.getScriptService();
+            similarityService = new SimilarityService(idxSettings, null, Collections.emptyMap());
+            MapperRegistry mapperRegistry = indicesModule.getMapperRegistry();
+            mapperService = new MapperService(idxSettings, indexAnalyzers, xContentRegistry, similarityService, mapperRegistry,
+                    () -> createShardContext(null));
+            IndicesFieldDataCache indicesFieldDataCache = new IndicesFieldDataCache(nodeSettings, new IndexFieldDataCache.Listener() {
+            });
+            indexFieldDataService = new IndexFieldDataService(idxSettings, indicesFieldDataCache,
+                    new NoneCircuitBreakerService(), mapperService);
+            bitsetFilterCache = new BitsetFilterCache(idxSettings, new BitsetFilterCache.Listener() {
+                @Override
+                public void onCache(ShardId shardId, Accountable accountable) {
+
+                }
+
+                @Override
+                public void onRemoval(ShardId shardId, Accountable accountable) {
+
+                }
+            });
+
+            for (String type : currentTypes) {
+                mapperService.merge(type, new CompressedXContent(Strings.toString(PutMappingRequest.buildFromSimplifiedDef(type,
+                        STRING_FIELD_NAME, "type=text",
+                        STRING_FIELD_NAME_2, "type=keyword",
+                        INT_FIELD_NAME, "type=integer",
+                        INT_RANGE_FIELD_NAME, "type=integer_range",
+                        DOUBLE_FIELD_NAME, "type=double",
+                        BOOLEAN_FIELD_NAME, "type=boolean",
+                        DATE_FIELD_NAME, "type=date",
+                        DATE_RANGE_FIELD_NAME, "type=date_range",
+                        OBJECT_FIELD_NAME, "type=object",
+                        GEO_POINT_FIELD_NAME, "type=geo_point",
+                        GEO_SHAPE_FIELD_NAME, "type=geo_shape"
+                ))), MapperService.MergeReason.MAPPING_UPDATE);
+                // also add mappings for two inner field in the object field
+                mapperService.merge(type, new CompressedXContent("{\"properties\":{\"" + OBJECT_FIELD_NAME + "\":{\"type\":\"object\","
+                                + "\"properties\":{\"" + DATE_FIELD_NAME + "\":{\"type\":\"date\"},\"" +
+                                INT_FIELD_NAME + "\":{\"type\":\"integer\"}}}}}"),
+                        MapperService.MergeReason.MAPPING_UPDATE);
+            }
+            testCase.initializeAdditionalMappings(mapperService);
+        }
+
+        @Override
+        public void close() throws IOException {
+        }
+
+        QueryShardContext createShardContext(IndexReader reader) {
+            return new QueryShardContext(0, idxSettings, bitsetFilterCache, indexFieldDataService::getForField, mapperService,
+                similarityService, scriptService, xContentRegistry, namedWriteableRegistry, this.client, reader, () -> nowInMillis, null);
+        }
+
+        ScriptModule createScriptModule(List<ScriptPlugin> scriptPlugins) {
+            if (scriptPlugins == null || scriptPlugins.isEmpty()) {
+                return newTestScriptModule();
+            }
+            return new ScriptModule(Settings.EMPTY, scriptPlugins);
+        }
+    }
+
+}

test/framework/src/main/java/org/elasticsearch/test/AbstractQueryTestCase.java

@@ -25,33 +25,17 @@ import org.apache.lucene.search.BoostQuery;
 import org.apache.lucene.search.Query;
 import org.apache.lucene.search.TermQuery;
 import org.apache.lucene.search.spans.SpanBoostQuery;
-import org.apache.lucene.util.Accountable;
 import org.elasticsearch.ElasticsearchParseException;
 import org.elasticsearch.Version;
-import org.elasticsearch.action.ActionListener;
-import org.elasticsearch.action.admin.indices.mapping.put.PutMappingRequest;
-import org.elasticsearch.action.get.GetRequest;
-import org.elasticsearch.action.get.GetResponse;
 import org.elasticsearch.action.support.PlainActionFuture;
-import org.elasticsearch.action.termvectors.MultiTermVectorsRequest;
-import org.elasticsearch.action.termvectors.MultiTermVectorsResponse;
-import org.elasticsearch.client.Client;
-import org.elasticsearch.cluster.metadata.IndexMetaData;
-import org.elasticsearch.cluster.metadata.MetaData;
 import org.elasticsearch.common.ParsingException;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.collect.Tuple;
-import org.elasticsearch.common.compress.CompressedXContent;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.io.stream.NamedWriteableAwareStreamInput;
-import org.elasticsearch.common.io.stream.NamedWriteableRegistry;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.Writeable.Reader;
-import org.elasticsearch.common.settings.IndexScopedSettings;
-import org.elasticsearch.common.settings.Setting;
-import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.common.settings.SettingsModule;
 import org.elasticsearch.common.unit.Fuzziness;
 import org.elasticsearch.common.xcontent.DeprecationHandler;
 import org.elasticsearch.common.xcontent.NamedXContentRegistry;
@@ -64,55 +48,18 @@ import org.elasticsearch.common.xcontent.XContentParseException;
 import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.common.xcontent.json.JsonXContent;
-import org.elasticsearch.core.internal.io.IOUtils;
-import org.elasticsearch.env.Environment;
-import org.elasticsearch.env.TestEnvironment;
-import org.elasticsearch.index.Index;
-import org.elasticsearch.index.IndexSettings;
-import org.elasticsearch.index.analysis.IndexAnalyzers;
-import org.elasticsearch.index.cache.bitset.BitsetFilterCache;
-import org.elasticsearch.index.fielddata.IndexFieldData;
-import org.elasticsearch.index.fielddata.IndexFieldDataCache;
-import org.elasticsearch.index.fielddata.IndexFieldDataService;
-import org.elasticsearch.index.mapper.MappedFieldType;
-import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.index.query.AbstractQueryBuilder;
 import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.index.query.QueryRewriteContext;
 import org.elasticsearch.index.query.QueryShardContext;
 import org.elasticsearch.index.query.Rewriteable;
 import org.elasticsearch.index.query.support.QueryParsers;
-import org.elasticsearch.index.shard.ShardId;
-import org.elasticsearch.index.similarity.SimilarityService;
-import org.elasticsearch.indices.IndicesModule;
-import org.elasticsearch.indices.analysis.AnalysisModule;
-import org.elasticsearch.indices.breaker.NoneCircuitBreakerService;
-import org.elasticsearch.indices.fielddata.cache.IndicesFieldDataCache;
-import org.elasticsearch.indices.mapper.MapperRegistry;
-import org.elasticsearch.node.InternalSettingsPreparer;
-import org.elasticsearch.plugins.MapperPlugin;
-import org.elasticsearch.plugins.Plugin;
-import org.elasticsearch.plugins.PluginsService;
-import org.elasticsearch.plugins.ScriptPlugin;
-import org.elasticsearch.plugins.SearchPlugin;
-import org.elasticsearch.script.ScriptModule;
-import org.elasticsearch.script.ScriptService;
-import org.elasticsearch.search.SearchModule;
 import org.elasticsearch.search.internal.SearchContext;
 import org.joda.time.DateTime;
 import org.joda.time.DateTimeZone;
-import org.junit.After;
-import org.junit.AfterClass;
-import org.junit.Before;
-import org.junit.BeforeClass;
 
-import java.io.Closeable;
 import java.io.IOException;
-import java.lang.reflect.InvocationHandler;
-import java.lang.reflect.Method;
-import java.lang.reflect.Proxy;
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.Collections;
 import java.util.Deque;
 import java.util.HashSet;
@@ -121,12 +68,7 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Set;
-import java.util.concurrent.ExecutionException;
-import java.util.function.Function;
-import java.util.stream.Stream;
 
-import static java.util.Collections.emptyList;
-import static java.util.stream.Collectors.toList;
 import static org.elasticsearch.index.query.AbstractQueryBuilder.parseInnerQueryBuilder;
 import static org.elasticsearch.test.EqualsHashCodeTestUtils.checkEqualsAndHashCode;
 import static org.hamcrest.CoreMatchers.equalTo;
@@ -136,116 +78,10 @@ import static org.hamcrest.Matchers.greaterThan;
 import static org.hamcrest.Matchers.instanceOf;
 
 
-public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>> extends ESTestCase {
+public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>> extends AbstractBuilderTestCase {
 
-    public static final String STRING_FIELD_NAME = "mapped_string";
-    protected static final String STRING_FIELD_NAME_2 = "mapped_string_2";
-    protected static final String INT_FIELD_NAME = "mapped_int";
-    protected static final String INT_RANGE_FIELD_NAME = "mapped_int_range";
-    protected static final String DOUBLE_FIELD_NAME = "mapped_double";
-    protected static final String BOOLEAN_FIELD_NAME = "mapped_boolean";
-    protected static final String DATE_FIELD_NAME = "mapped_date";
-    protected static final String DATE_RANGE_FIELD_NAME = "mapped_date_range";
-    protected static final String OBJECT_FIELD_NAME = "mapped_object";
-    protected static final String GEO_POINT_FIELD_NAME = "mapped_geo_point";
-    protected static final String GEO_SHAPE_FIELD_NAME = "mapped_geo_shape";
-    protected static final String[] MAPPED_FIELD_NAMES = new String[]{STRING_FIELD_NAME, INT_FIELD_NAME, INT_RANGE_FIELD_NAME,
-            DOUBLE_FIELD_NAME, BOOLEAN_FIELD_NAME, DATE_FIELD_NAME, DATE_RANGE_FIELD_NAME, OBJECT_FIELD_NAME, GEO_POINT_FIELD_NAME,
-            GEO_SHAPE_FIELD_NAME};
-    private static final String[] MAPPED_LEAF_FIELD_NAMES = new String[]{STRING_FIELD_NAME, INT_FIELD_NAME, INT_RANGE_FIELD_NAME,
-            DOUBLE_FIELD_NAME, BOOLEAN_FIELD_NAME, DATE_FIELD_NAME, DATE_RANGE_FIELD_NAME,  GEO_POINT_FIELD_NAME, };
     private static final int NUMBER_OF_TESTQUERIES = 20;
 
-    protected static Version indexVersionCreated;
-
-    private static ServiceHolder serviceHolder;
-    private static int queryNameId = 0;
-    private static Settings nodeSettings;
-    private static Index index;
-    private static String[] currentTypes;
-    private static String[] randomTypes;
-
-    protected static Index getIndex() {
-        return index;
-    }
-
-    protected static String[] getCurrentTypes() {
-        return currentTypes;
-    }
-
-    protected Collection<Class<? extends Plugin>> getPlugins() {
-        return Collections.emptyList();
-    }
-
-    protected void initializeAdditionalMappings(MapperService mapperService) throws IOException {
-    }
-
-    @BeforeClass
-    public static void beforeClass() {
-        nodeSettings = Settings.builder()
-                .put("node.name", AbstractQueryTestCase.class.toString())
-                .put(Environment.PATH_HOME_SETTING.getKey(), createTempDir())
-                .build();
-
-        index = new Index(randomAlphaOfLengthBetween(1, 10), "_na_");
-
-        // Set a single type in the index
-        switch (random().nextInt(3)) {
-        case 0:
-            currentTypes = new String[0]; // no types
-            break;
-        default:
-            currentTypes = new String[] { "_doc" };
-            break;
-        }
-        randomTypes = getRandomTypes();
-    }
-
-    protected Settings indexSettings() {
-        // we have to prefer CURRENT since with the range of versions we support it's rather unlikely to get the current actually.
-        indexVersionCreated = randomBoolean() ? Version.CURRENT
-                : VersionUtils.randomVersionBetween(random(), null, Version.CURRENT);
-        return Settings.builder()
-            .put(IndexMetaData.SETTING_VERSION_CREATED, indexVersionCreated)
-            .build();
-    }
-
-    @AfterClass
-    public static void afterClass() throws Exception {
-        IOUtils.close(serviceHolder);
-        serviceHolder = null;
-    }
-
-    @Before
-    public void beforeTest() throws IOException {
-        if (serviceHolder == null) {
-            serviceHolder = new ServiceHolder(nodeSettings, indexSettings(), getPlugins(), this);
-        }
-        serviceHolder.clientInvocationHandler.delegate = this;
-    }
-
-    private static SearchContext getSearchContext(String[] types, QueryShardContext context) {
-        TestSearchContext testSearchContext = new TestSearchContext(context) {
-            @Override
-            public MapperService mapperService() {
-                return serviceHolder.mapperService; // need to build / parse inner hits sort fields
-            }
-
-            @Override
-            public <IFD extends IndexFieldData<?>> IFD getForField(MappedFieldType fieldType) {
-                return serviceHolder.indexFieldDataService.getForField(fieldType); // need to build / parse inner hits sort fields
-            }
-
-        };
-        testSearchContext.getQueryShardContext().setTypes(types);
-        return testSearchContext;
-    }
-
-    @After
-    public void afterTest() {
-        serviceHolder.clientInvocationHandler.delegate = null;
-    }
-
     public final QB createTestQueryBuilder() {
         QB query = doCreateTestQueryBuilder();
         //we should not set boost and query name for queries that don't parse it
@@ -260,15 +96,6 @@ public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>>
         return query;
     }
 
-    /**
-     * make sure query names are unique by suffixing them with increasing counter
-     */
-    private static String createUniqueRandomName() {
-        String queryName = randomAlphaOfLengthBetween(1, 10) + queryNameId;
-        queryNameId++;
-        return queryName;
-    }
-
     /**
      * Create the query that is being tested
      */
@@ -717,18 +544,18 @@ public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>>
         }
     }
 
-    protected static QueryBuilder assertSerialization(QueryBuilder testQuery) throws IOException {
+    protected QueryBuilder assertSerialization(QueryBuilder testQuery) throws IOException {
         return assertSerialization(testQuery, Version.CURRENT);
     }
 
     /**
      * Serialize the given query builder and asserts that both are equal
      */
-    protected static QueryBuilder assertSerialization(QueryBuilder testQuery, Version version) throws IOException {
+    protected QueryBuilder assertSerialization(QueryBuilder testQuery, Version version) throws IOException {
         try (BytesStreamOutput output = new BytesStreamOutput()) {
             output.setVersion(version);
             output.writeNamedWriteable(testQuery);
-            try (StreamInput in = new NamedWriteableAwareStreamInput(output.bytes().streamInput(), serviceHolder.namedWriteableRegistry)) {
+            try (StreamInput in = new NamedWriteableAwareStreamInput(output.bytes().streamInput(), namedWriteableRegistry())) {
                 in.setVersion(version);
                 QueryBuilder deserializedQuery = in.readNamedWriteable(QueryBuilder.class);
                 assertEquals(testQuery, deserializedQuery);
@@ -780,15 +607,8 @@ public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>>
     //we use the streaming infra to create a copy of the query provided as argument
     @SuppressWarnings("unchecked")
     private QB copyQuery(QB query) throws IOException {
-        Reader<QB> reader = (Reader<QB>) serviceHolder.namedWriteableRegistry.getReader(QueryBuilder.class, query.getWriteableName());
-        return copyWriteable(query, serviceHolder.namedWriteableRegistry, reader);
-    }
-
-    /**
-     * @return a new {@link QueryShardContext} based on the base test index and queryParserService
-     */
-    protected static QueryShardContext createShardContext() {
-        return serviceHolder.createShardContext();
+        Reader<QB> reader = (Reader<QB>) namedWriteableRegistry().getReader(QueryBuilder.class, query.getWriteableName());
+        return copyWriteable(query, namedWriteableRegistry(), reader);
     }
 
     /**
@@ -840,7 +660,7 @@ public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>>
      */
     protected static String getRandomFieldName() {
         // if no type is set then return a random field name
-        if (currentTypes.length == 0 || randomBoolean()) {
+        if (getCurrentTypes().length == 0 || randomBoolean()) {
             return randomAlphaOfLengthBetween(1, 10);
         }
         return randomFrom(MAPPED_LEAF_FIELD_NAMES);
@@ -863,24 +683,6 @@ public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>>
         return rewrite;
     }
 
-    private static String[] getRandomTypes() {
-        String[] types;
-        if (currentTypes.length > 0 && randomBoolean()) {
-            int numberOfQueryTypes = randomIntBetween(1, currentTypes.length);
-            types = new String[numberOfQueryTypes];
-            for (int i = 0; i < numberOfQueryTypes; i++) {
-                types[i] = randomFrom(currentTypes);
-            }
-        } else {
-            if (randomBoolean()) {
-                types = new String[]{MetaData.ALL};
-            } else {
-                types = new String[0];
-            }
-        }
-        return types;
-    }
-
     protected static Fuzziness randomFuzziness(String fieldName) {
         switch (fieldName) {
             case INT_FIELD_NAME:
@@ -905,50 +707,6 @@ public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>>
         return randomFrom("1", "-1", "75%", "-25%", "2<75%", "2<-25%");
     }
 
-    private static class ClientInvocationHandler implements InvocationHandler {
-        AbstractQueryTestCase<?> delegate;
-
-        @Override
-        public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
-            if (method.equals(Client.class.getMethod("get", GetRequest.class, ActionListener.class))){
-                GetResponse getResponse = delegate.executeGet((GetRequest) args[0]);
-                ActionListener<GetResponse> listener = (ActionListener<GetResponse>) args[1];
-                if (randomBoolean()) {
-                    listener.onResponse(getResponse);
-                } else {
-                    new Thread(() -> listener.onResponse(getResponse)).start();
-                }
-                return null;
-            } else if (method.equals(Client.class.getMethod
-                ("multiTermVectors", MultiTermVectorsRequest.class))) {
-                return new PlainActionFuture<MultiTermVectorsResponse>() {
-                    @Override
-                    public MultiTermVectorsResponse get() throws InterruptedException, ExecutionException {
-                        return delegate.executeMultiTermVectors((MultiTermVectorsRequest) args[0]);
-                    }
-                };
-            } else if (method.equals(Object.class.getMethod("toString"))) {
-                return "MockClient";
-            }
-            throw new UnsupportedOperationException("this test can't handle calls to: " + method);
-        }
-
-    }
-
-    /**
-     * Override this to handle {@link Client#get(GetRequest)} calls from parsers / builders
-     */
-    protected GetResponse executeGet(GetRequest getRequest) {
-        throw new UnsupportedOperationException("this test can't handle GET requests");
-    }
-
-    /**
-     * Override this to handle {@link Client#get(GetRequest)} calls from parsers / builders
-     */
-    protected MultiTermVectorsResponse executeMultiTermVectors(MultiTermVectorsRequest mtvRequest) {
-        throw new UnsupportedOperationException("this test can't handle MultiTermVector requests");
-    }
-
     /**
      * Call this method to check a valid json string representing the query under test against
      * it's generated json.
@@ -1015,113 +773,6 @@ public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>>
         return query;
     }
 
-    @Override
-    protected NamedXContentRegistry xContentRegistry() {
-        return serviceHolder.xContentRegistry;
-    }
-
-    private static class ServiceHolder implements Closeable {
-        private final IndexFieldDataService indexFieldDataService;
-        private final SearchModule searchModule;
-        private final NamedWriteableRegistry namedWriteableRegistry;
-        private final NamedXContentRegistry xContentRegistry;
-        private final ClientInvocationHandler clientInvocationHandler = new ClientInvocationHandler();
-        private final IndexSettings idxSettings;
-        private final SimilarityService similarityService;
-        private final MapperService mapperService;
-        private final BitsetFilterCache bitsetFilterCache;
-        private final ScriptService scriptService;
-        private final Client client;
-        private final long nowInMillis = randomNonNegativeLong();
-
-        ServiceHolder(Settings nodeSettings, Settings indexSettings,
-                      Collection<Class<? extends Plugin>> plugins, AbstractQueryTestCase<?> testCase) throws IOException {
-            Environment env = InternalSettingsPreparer.prepareEnvironment(nodeSettings);
-            PluginsService pluginsService;
-            pluginsService = new PluginsService(nodeSettings, null, env.modulesFile(), env.pluginsFile(), plugins);
-
-            client = (Client) Proxy.newProxyInstance(
-                    Client.class.getClassLoader(),
-                    new Class[]{Client.class},
-                    clientInvocationHandler);
-            ScriptModule scriptModule = createScriptModule(pluginsService.filterPlugins(ScriptPlugin.class));
-            List<Setting<?>> additionalSettings = pluginsService.getPluginSettings();
-            additionalSettings.add(InternalSettingsPlugin.VERSION_CREATED);
-            SettingsModule settingsModule = new SettingsModule(nodeSettings, additionalSettings, pluginsService.getPluginSettingsFilter());
-            searchModule = new SearchModule(nodeSettings, false, pluginsService.filterPlugins(SearchPlugin.class));
-            IndicesModule indicesModule = new IndicesModule(pluginsService.filterPlugins(MapperPlugin.class));
-            List<NamedWriteableRegistry.Entry> entries = new ArrayList<>();
-            entries.addAll(indicesModule.getNamedWriteables());
-            entries.addAll(searchModule.getNamedWriteables());
-            namedWriteableRegistry = new NamedWriteableRegistry(entries);
-            xContentRegistry = new NamedXContentRegistry(Stream.of(
-                    searchModule.getNamedXContents().stream()
-                    ).flatMap(Function.identity()).collect(toList()));
-            IndexScopedSettings indexScopedSettings = settingsModule.getIndexScopedSettings();
-            idxSettings = IndexSettingsModule.newIndexSettings(index, indexSettings, indexScopedSettings);
-            AnalysisModule analysisModule = new AnalysisModule(TestEnvironment.newEnvironment(nodeSettings), emptyList());
-            IndexAnalyzers indexAnalyzers = analysisModule.getAnalysisRegistry().build(idxSettings);
-            scriptService = scriptModule.getScriptService();
-            similarityService = new SimilarityService(idxSettings, null, Collections.emptyMap());
-            MapperRegistry mapperRegistry = indicesModule.getMapperRegistry();
-            mapperService = new MapperService(idxSettings, indexAnalyzers, xContentRegistry, similarityService, mapperRegistry,
-                    this::createShardContext);
-            IndicesFieldDataCache indicesFieldDataCache = new IndicesFieldDataCache(nodeSettings, new IndexFieldDataCache.Listener() {
-            });
-            indexFieldDataService = new IndexFieldDataService(idxSettings, indicesFieldDataCache,
-                    new NoneCircuitBreakerService(), mapperService);
-            bitsetFilterCache = new BitsetFilterCache(idxSettings, new BitsetFilterCache.Listener() {
-                @Override
-                public void onCache(ShardId shardId, Accountable accountable) {
-
-                }
-
-                @Override
-                public void onRemoval(ShardId shardId, Accountable accountable) {
-
-                }
-            });
-
-            for (String type : currentTypes) {
-                mapperService.merge(type, new CompressedXContent(Strings.toString(PutMappingRequest.buildFromSimplifiedDef(type,
-                        STRING_FIELD_NAME, "type=text",
-                        STRING_FIELD_NAME_2, "type=keyword",
-                        INT_FIELD_NAME, "type=integer",
-                        INT_RANGE_FIELD_NAME, "type=integer_range",
-                        DOUBLE_FIELD_NAME, "type=double",
-                        BOOLEAN_FIELD_NAME, "type=boolean",
-                        DATE_FIELD_NAME, "type=date",
-                        DATE_RANGE_FIELD_NAME, "type=date_range",
-                        OBJECT_FIELD_NAME, "type=object",
-                        GEO_POINT_FIELD_NAME, "type=geo_point",
-                        GEO_SHAPE_FIELD_NAME, "type=geo_shape"
-                ))), MapperService.MergeReason.MAPPING_UPDATE);
-                // also add mappings for two inner field in the object field
-                mapperService.merge(type, new CompressedXContent("{\"properties\":{\"" + OBJECT_FIELD_NAME + "\":{\"type\":\"object\","
-                                + "\"properties\":{\"" + DATE_FIELD_NAME + "\":{\"type\":\"date\"},\"" +
-                                INT_FIELD_NAME + "\":{\"type\":\"integer\"}}}}}"),
-                        MapperService.MergeReason.MAPPING_UPDATE);
-            }
-            testCase.initializeAdditionalMappings(mapperService);
-        }
-
-        @Override
-        public void close() throws IOException {
-        }
-
-        QueryShardContext createShardContext() {
-            return new QueryShardContext(0, idxSettings, bitsetFilterCache, indexFieldDataService::getForField, mapperService,
-                similarityService, scriptService, xContentRegistry, namedWriteableRegistry, this.client, null, () -> nowInMillis, null);
-        }
-
-        ScriptModule createScriptModule(List<ScriptPlugin> scriptPlugins) {
-            if (scriptPlugins == null || scriptPlugins.isEmpty()) {
-                return newTestScriptModule();
-            }
-            return new ScriptModule(Settings.EMPTY, scriptPlugins);
-        }
-    }
-
     protected QueryBuilder rewriteAndFetch(QueryBuilder builder, QueryRewriteContext context) throws IOException {
         PlainActionFuture<QueryBuilder> future = new PlainActionFuture<>();
         Rewriteable.rewriteAndFetch(builder, context, future);

test/framework/src/main/java/org/elasticsearch/test/ESTestCase.java

@@ -659,20 +659,20 @@ public abstract class ESTestCase extends LuceneTestCase {
         return RandomizedTest.randomRealisticUnicodeOfCodepointLength(codePoints);
     }
 
-    public static String[] generateRandomStringArray(int maxArraySize, int maxStringSize, boolean allowNull, boolean allowEmpty) {
+    public static String[] generateRandomStringArray(int maxArraySize, int stringSize, boolean allowNull, boolean allowEmpty) {
         if (allowNull && random().nextBoolean()) {
             return null;
         }
         int arraySize = randomIntBetween(allowEmpty ? 0 : 1, maxArraySize);
         String[] array = new String[arraySize];
         for (int i = 0; i < arraySize; i++) {
-            array[i] = RandomStrings.randomAsciiOfLength(random(), maxStringSize);
+            array[i] = RandomStrings.randomAsciiOfLength(random(), stringSize);
         }
         return array;
     }
 
-    public static String[] generateRandomStringArray(int maxArraySize, int maxStringSize, boolean allowNull) {
-        return generateRandomStringArray(maxArraySize, maxStringSize, allowNull, true);
+    public static String[] generateRandomStringArray(int maxArraySize, int stringSize, boolean allowNull) {
+        return generateRandomStringArray(maxArraySize, stringSize, allowNull, true);
     }
 
     private static final String[] TIME_SUFFIXES = new String[]{"d", "h", "ms", "s", "m", "micros", "nanos"};

x-pack/docs/build.gradle

@@ -81,7 +81,7 @@ buildRestTests.expectedUnconvertedCandidates = [
         'en/rest-api/ml/validate-job.asciidoc',
         'en/rest-api/security/authenticate.asciidoc',
         'en/rest-api/watcher/stats.asciidoc',
-        'en/security/authorization/overview.asciidoc',
+        'en/security/authorization/managing-roles.asciidoc',
         'en/watcher/example-watches/watching-time-series-data.asciidoc',
 ]
 

x-pack/docs/en/security/authorization/built-in-roles.asciidoc

@@ -0,0 +1,114 @@
+[role="xpack"]
+[[built-in-roles]]
+=== Built-in roles
+
+{security} applies a default role to all users, including
+<<anonymous-access, anonymous users>>. The default role enables users to access
+the authenticate endpoint, change their own passwords, and get information about
+themselves.
+
+{security} also provides a set of built-in roles you can explicitly assign
+to users. These roles have a fixed set of privileges and cannot be updated.
+
+[[built-in-roles-ingest-user]] `ingest_admin` ::
+Grants access to manage *all* index templates and *all* ingest pipeline configurations.
++
+NOTE: This role does *not* provide the ability to create indices; those privileges
+must be defined in a separate role.
+
+[[built-in-roles-kibana-dashboard]] `kibana_dashboard_only_user` ::
+Grants access to the {kib} Dashboard and read-only permissions on the `.kibana`
+index. This role does not have access to editing tools in {kib}. For more
+information, see
+{kibana-ref}/xpack-dashboard-only-mode.html[{kib} Dashboard Only Mode].
+
+[[built-in-roles-kibana-system]] `kibana_system` ::
+Grants access necessary for the {kib} system user to read from and write to the
+{kib} indices, manage index templates, and check the availability of the {es} cluster.
+This role grants read access to the `.monitoring-*` indices and read and write access
+to the `.reporting-*` indices. For more information, see
+{kibana-ref}/using-kibana-with-security.html[Configuring Security in {kib}].
++
+NOTE: This role should not be assigned to users as the granted permissions may
+change between releases.
+
+[[built-in-roles-kibana-user]] `kibana_user`::
+Grants the minimum privileges required for any user of {kib}. This role grants
+access to the {kib} indices and grants  monitoring privileges for the cluster.
+
+[[built-in-roles-logstash-admin]] `logstash_admin` ::
+Grants access to the `.logstash*` indices for managing configurations.
+
+[[built-in-roles-logstash-system]] `logstash_system` ::
+Grants access necessary for the Logstash system user to send system-level data
+(such as monitoring) to {es}. For more information, see
+{logstash-ref}/ls-security.html[Configuring Security in Logstash].
++
+NOTE: This role should not be assigned to users as the granted permissions may
+change between releases.
++
+NOTE: This role does not provide access to the logstash indices and is not
+suitable for use within a Logstash pipeline.
+
+[[built-in-roles-beats-system]] `beats_system` ::
+Grants access necessary for the Beats system user to send system-level data
+(such as monitoring) to {es}.
++
+NOTE: This role should not be assigned to users as the granted permissions may
+change between releases.
++
+NOTE: This role does not provide access to the beats indices and is not
+suitable for writing beats output to {es}.
+
+[[built-in-roles-ml-admin]] `machine_learning_admin`::
+Grants `manage_ml` cluster privileges and read access to the `.ml-*` indices.
+
+[[built-in-roles-ml-user]] `machine_learning_user`::
+Grants the minimum privileges required to view {xpackml} configuration,
+status, and results. This role grants `monitor_ml` cluster privileges and
+read access to the `.ml-notifications` and `.ml-anomalies*` indices,
+which store {ml} results.
+
+[[built-in-roles-monitoring-user]] `monitoring_user`::
+Grants the minimum privileges required for any user of {monitoring} other than those
+required to use {kib}. This role grants access to the monitoring indices and grants
+privileges necessary for reading basic cluster information. Monitoring users should
+also be assigned the `kibana_user` role.
+
+[[built-in-roles-remote-monitoring-agent]] `remote_monitoring_agent`::
+Grants the minimum privileges required for a remote monitoring agent to write data
+into this cluster.
+
+[[built-in-roles-reporting-user]] `reporting_user`::
+Grants the specific privileges required for users of {reporting} other than those
+required to use {kib}. This role grants access to the reporting indices. Reporting
+users should also be assigned the `kibana_user` role and a role that grants them
+access to the data that will be used to generate reports with.
+
+[[built-in-roles-superuser]] `superuser`::
+Grants full access to the cluster, including all indices and data. A user with
+the `superuser` role can also manage users and roles and
+<<run-as-privilege, impersonate>> any other user in the system. Due to the
+permissive nature of this role, take extra care when assigning it to a user.
+
+[[built-in-roles-transport-client]] `transport_client`::
+Grants the privileges required to access the cluster through the Java Transport
+Client. The Java Transport Client fetches information about the nodes in the
+cluster using the _Node Liveness API_ and the _Cluster State API_ (when
+sniffing is enabled). Assign your users this role if they use the
+Transport Client.
++
+NOTE: Using the Transport Client effectively means the users are granted access
+to the cluster state. This means users can view the metadata over all indices,
+index templates, mappings, node and basically everything about the cluster.
+However, this role does not grant permission to view the data in all indices.
+
+[[built-in-roles-watcher-admin]] `watcher_admin`::
++
+Grants write access to the `.watches` index, read access to the watch history and
+the triggered watches index and allows to execute all watcher actions.
+
+[[built-in-roles-watcher-user]] `watcher_user`::
++
+Grants read access to the `.watches` index, the get watch action and the watcher
+stats.

x-pack/docs/en/security/authorization/managing-roles.asciidoc

@@ -0,0 +1,175 @@
+[role="xpack"]
+[[defining-roles]]
+=== Defining roles
+
+A role is defined by the following JSON structure:
+
+[source,js]
+-----
+{
+  "run_as": [ ... ], <1>
+  "cluster": [ ... ], <2>
+  "indices": [ ... ] <3>
+}
+-----
+<1> A list of usernames the owners of this role can <<run-as-privilege, impersonate>>.
+<2> A list of cluster privileges. These privileges define the
+    cluster level actions users with this role are able to execute. This field
+    is optional (missing `cluster` privileges effectively mean no cluster level
+    permissions).
+<3> A list of indices permissions entries. This field is optional (missing `indices`
+    privileges effectively mean no index level permissions).
+
+[[valid-role-name]]
+NOTE: Role names must be at least 1 and no more than 1024 characters. They can
+      contain alphanumeric characters (`a-z`, `A-Z`, `0-9`), spaces,
+      punctuation, and printable symbols in the https://en.wikipedia.org/wiki/Basic_Latin_(Unicode_block)[Basic Latin (ASCII) block].
+      Leading or trailing whitespace is not allowed.
+
+The following describes the structure of an indices permissions entry:
+
+[source,js]
+-------
+{
+  "names": [ ... ], <1>
+  "privileges": [ ... ], <2>
+  "field_security" : { ... }, <3>
+  "query": "..." <4>
+}
+-------
+<1> A list of indices (or index name patterns) to which the permissions in this
+    entry apply.
+<2> The index level privileges the owners of the role have on the associated
+    indices (those indices that are specified in the `name` field)
+<3> Specification for document fields the owners of the role have read access to.
+    See <<field-and-document-access-control>> for details.
+<4> A search query that defines the documents the owners of the role have read
+    access to. A document within the associated indices must match this query
+    in order for it to be accessible by the owners of the role.
+
+[TIP]
+==============================================================================
+When specifying index names, you can use indices and aliases with their full
+names or regular expressions that refer to multiple indices.
+
+* Wildcard (default) - simple wildcard matching where `*` is a placeholder
+  for zero or more characters, `?` is a placeholder for a single character
+  and `\` may be used as an escape character.
+
+* Regular Expressions - A more powerful syntax for matching more complex
+  patterns. This regular expression is based on Lucene's regexp automaton
+  syntax. To enable this syntax, it must be wrapped within a pair of
+  forward slashes (`/`). Any pattern starting with `/` and not ending with
+  `/` is considered to be malformed.
+
+.Example Regular Expressions
+[source,yaml]
+------------------------------------------------------------------------------
+"foo-bar":               # match the literal `foo-bar`
+"foo-*":                 # match anything beginning with "foo-"
+"logstash-201?-*":       # ? matches any one character
+"/.*-201[0-9]-.*/":      # use a regex to match anything containing 2010-2019
+"/foo":                  # syntax error - missing final /
+------------------------------------------------------------------------------
+==============================================================================
+
+The following snippet shows an example definition of a `clicks_admin` role:
+
+[source,js]
+-----------
+{
+  "run_as": [ "clicks_watcher_1" ]
+  "cluster": [ "monitor" ],
+  "indices": [
+    {
+      "names": [ "events-*" ],
+      "privileges": [ "read" ],
+      "field_security" : {
+        "grant" : [ "category", "@timestamp", "message" ]
+      },
+      "query": "{\"match\": {\"category\": \"click\"}}"
+    }
+  ]
+}
+-----------
+
+Based on the above definition, users owning the `clicks_admin` role can:
+
+  * Impersonate the `clicks_watcher_1` user and execute requests on its behalf.
+  * Monitor the {es} cluster
+  * Read data from all indices prefixed with `events-`
+  * Within these indices, only read the events of the `click` category
+  * Within these document, only read the `category`, `@timestamp` and `message`
+    fields.
+
+TIP:  For a complete list of available <<security-privileges, cluster and indices privileges>>
+
+There are two available mechanisms to define roles: using the _Role Management APIs_
+or in local files on the {es} nodes.  {security} also supports implementing
+custom roles providers.  If you need to integrate with another system to retrieve
+user roles, you can build a custom roles provider plugin. For more information,
+see <<custom-roles-provider, Custom Roles Provider Extension>>.
+
+[float]
+[[roles-management-ui]]
+=== Role management UI
+
+{security} enables you to easily manage users and roles from within {kib}. To
+manage roles, log in to {kib} and go to *Management / Elasticsearch / Roles*. 
+
+[float]
+[[roles-management-api]]
+=== Role management API
+
+The _Role Management APIs_ enable you to add, update, remove and retrieve roles
+dynamically. When you use the APIs to manage roles in the `native` realm, the
+roles are stored in an internal {es} index. For more information and examples, 
+see {ref}/security-api-roles.html[Role Management APIs]. 
+
+[float]
+[[roles-management-file]]
+=== File-based role management
+
+Apart from the _Role Management APIs_, roles can also be defined in local
+`roles.yml` file located in `CONFIG_DIR`. This is a YAML file where each
+role definition is keyed by its name.
+
+[IMPORTANT]
+==============================
+If the same role name is used in the `roles.yml` file and through the
+_Role Management APIs_, the role found in the file will be used.
+==============================
+
+While the _Role Management APIs_ is the preferred mechanism to define roles,
+using the `roles.yml` file becomes useful if you want to define fixed roles that
+no one (beside an administrator having physical access to the {es} nodes)
+would be able to change.
+
+[IMPORTANT]
+==============================
+The `roles.yml` file is managed locally by the node and is not globally by the
+cluster. This means that with a typical multi-node cluster, the exact same
+changes need to be applied on each and every node in the cluster.
+
+A safer approach would be to apply the change on one of the nodes and have the
+`roles.yml` distributed/copied to all other nodes in the cluster (either
+manually or using a configuration management system such as Puppet or Chef).
+==============================
+
+The following snippet shows an example of the `roles.yml` file configuration:
+
+[source,yaml]
+-----------------------------------
+click_admins:
+  run_as: [ 'clicks_watcher_1' ]
+  cluster: [ 'monitor' ]
+  indices:
+    - names: [ 'events-*' ]
+      privileges: [ 'read' ]
+      field_security:
+        grant: ['category', '@timestamp', 'message' ]
+      query: '{"match": {"category": "click"}}'
+-----------------------------------
+
+{security} continuously monitors the `roles.yml` file and automatically picks
+up and applies any changes to it.

x-pack/docs/en/security/authorization/overview.asciidoc

@@ -49,295 +49,11 @@ As an administrator, you will need to define the roles that you want to use,
 then assign users to the roles. These can be assigned to users in a number of
 ways depending on the realms by which the users are authenticated.
 
-[[built-in-roles]]
-=== Built-in roles
+include::built-in-roles.asciidoc[]
 
-{security} applies a default role to all users, including
-<<anonymous-access, anonymous users>>. The default role enables users to access
-the authenticate endpoint, change their own passwords, and get information about
-themselves.
+include::managing-roles.asciidoc[]
 
-{security} also provides a set of built-in roles you can explicitly assign
-to users. These roles have a fixed set of privileges and cannot be updated.
-
-[[built-in-roles-ingest-user]] `ingest_admin` ::
-Grants access to manage *all* index templates and *all* ingest pipeline configurations.
-+
-NOTE: This role does *not* provide the ability to create indices; those privileges
-must be defined in a separate role.
-
-[[built-in-roles-kibana-dashboard]] `kibana_dashboard_only_user` ::
-Grants access to the {kib} Dashboard and read-only permissions on the `.kibana`
-index. This role does not have access to editing tools in {kib}. For more
-information, see
-{kibana-ref}/xpack-dashboard-only-mode.html[{kib} Dashboard Only Mode].
-
-[[built-in-roles-kibana-system]] `kibana_system` ::
-Grants access necessary for the {kib} system user to read from and write to the
-{kib} indices, manage index templates, and check the availability of the {es} cluster.
-This role grants read access to the `.monitoring-*` indices and read and write access
-to the `.reporting-*` indices. For more information, see
-{kibana-ref}/using-kibana-with-security.html[Configuring Security in {kib}].
-+
-NOTE: This role should not be assigned to users as the granted permissions may
-change between releases.
-
-[[built-in-roles-kibana-user]] `kibana_user`::
-Grants the minimum privileges required for any user of {kib}. This role grants
-access to the {kib} indices and grants  monitoring privileges for the cluster.
-
-[[built-in-roles-logstash-admin]] `logstash_admin` ::
-Grants access to the `.logstash*` indices for managing configurations.
-
-[[built-in-roles-logstash-system]] `logstash_system` ::
-Grants access necessary for the Logstash system user to send system-level data
-(such as monitoring) to {es}. For more information, see
-{logstash-ref}/ls-security.html[Configuring Security in Logstash].
-+
-NOTE: This role should not be assigned to users as the granted permissions may
-change between releases.
-+
-NOTE: This role does not provide access to the logstash indices and is not
-suitable for use within a Logstash pipeline.
-
-[[built-in-roles-beats-system]] `beats_system` ::
-Grants access necessary for the Beats system user to send system-level data
-(such as monitoring) to {es}.
-+
-NOTE: This role should not be assigned to users as the granted permissions may
-change between releases.
-+
-NOTE: This role does not provide access to the beats indices and is not
-suitable for writing beats output to {es}.
-
-[[built-in-roles-ml-admin]] `machine_learning_admin`::
-Grants `manage_ml` cluster privileges and read access to the `.ml-*` indices.
-
-[[built-in-roles-ml-user]] `machine_learning_user`::
-Grants the minimum privileges required to view {xpackml} configuration,
-status, and results. This role grants `monitor_ml` cluster privileges and
-read access to the `.ml-notifications` and `.ml-anomalies*` indices,
-which store {ml} results.
-
-[[built-in-roles-monitoring-user]] `monitoring_user`::
-Grants the minimum privileges required for any user of {monitoring} other than those
-required to use {kib}. This role grants access to the monitoring indices and grants
-privileges necessary for reading basic cluster information. Monitoring users should
-also be assigned the `kibana_user` role.
-
-[[built-in-roles-remote-monitoring-agent]] `remote_monitoring_agent`::
-Grants the minimum privileges required for a remote monitoring agent to write data
-into this cluster.
-
-[[built-in-roles-reporting-user]] `reporting_user`::
-Grants the specific privileges required for users of {reporting} other than those
-required to use {kib}. This role grants access to the reporting indices. Reporting
-users should also be assigned the `kibana_user` role and a role that grants them
-access to the data that will be used to generate reports with.
-
-[[built-in-roles-superuser]] `superuser`::
-Grants full access to the cluster, including all indices and data. A user with
-the `superuser` role can also manage users and roles and
-<<run-as-privilege, impersonate>> any other user in the system. Due to the
-permissive nature of this role, take extra care when assigning it to a user.
-
-[[built-in-roles-transport-client]] `transport_client`::
-Grants the privileges required to access the cluster through the Java Transport
-Client. The Java Transport Client fetches information about the nodes in the
-cluster using the _Node Liveness API_ and the _Cluster State API_ (when
-sniffing is enabled). Assign your users this role if they use the
-Transport Client.
-+
-NOTE: Using the Transport Client effectively means the users are granted access
-to the cluster state. This means users can view the metadata over all indices,
-index templates, mappings, node and basically everything about the cluster.
-However, this role does not grant permission to view the data in all indices.
-
-[[built-in-roles-watcher-admin]] `watcher_admin`::
-+
-Grants write access to the `.watches` index, read access to the watch history and
-the triggered watches index and allows to execute all watcher actions.
-
-[[built-in-roles-watcher-user]] `watcher_user`::
-+
-Grants read access to the `.watches` index, the get watch action and the watcher
-stats.
-
-
-[[defining-roles]]
-=== Defining roles
-
-A role is defined by the following JSON structure:
-
-[source,js]
------
-{
-  "run_as": [ ... ], <1>
-  "cluster": [ ... ], <2>
-  "indices": [ ... ] <3>
-}
------
-<1> A list of usernames the owners of this role can <<run-as-privilege, impersonate>>.
-<2> A list of cluster privileges. These privileges define the
-    cluster level actions users with this role are able to execute. This field
-    is optional (missing `cluster` privileges effectively mean no cluster level
-    permissions).
-<3> A list of indices permissions entries. This field is optional (missing `indices`
-    privileges effectively mean no index level permissions).
-
-[[valid-role-name]]
-NOTE: Role names must be at least 1 and no more than 1024 characters. They can
-      contain alphanumeric characters (`a-z`, `A-Z`, `0-9`), spaces,
-      punctuation, and printable symbols in the https://en.wikipedia.org/wiki/Basic_Latin_(Unicode_block)[Basic Latin (ASCII) block].
-      Leading or trailing whitespace is not allowed.
-
-The following describes the structure of an indices permissions entry:
-
-[source,js]
--------
-{
-  "names": [ ... ], <1>
-  "privileges": [ ... ], <2>
-  "field_security" : { ... }, <3>
-  "query": "..." <4>
-}
--------
-<1> A list of indices (or index name patterns) to which the permissions in this
-    entry apply.
-<2> The index level privileges the owners of the role have on the associated
-    indices (those indices that are specified in the `name` field)
-<3> Specification for document fields the owners of the role have read access to.
-    See <<field-and-document-access-control>> for details.
-<4> A search query that defines the documents the owners of the role have read
-    access to. A document within the associated indices must match this query
-    in order for it to be accessible by the owners of the role.
-
-[TIP]
-==============================================================================
-When specifying index names, you can use indices and aliases with their full
-names or regular expressions that refer to multiple indices.
-
-* Wildcard (default) - simple wildcard matching where `*` is a placeholder
-  for zero or more characters, `?` is a placeholder for a single character
-  and `\` may be used as an escape character.
-
-* Regular Expressions - A more powerful syntax for matching more complex
-  patterns. This regular expression is based on Lucene's regexp automaton
-  syntax. To enable this syntax, it must be wrapped within a pair of
-  forward slashes (`/`). Any pattern starting with `/` and not ending with
-  `/` is considered to be malformed.
-
-.Example Regular Expressions
-[source,yaml]
-------------------------------------------------------------------------------
-"foo-bar":               # match the literal `foo-bar`
-"foo-*":                 # match anything beginning with "foo-"
-"logstash-201?-*":       # ? matches any one character
-"/.*-201[0-9]-.*/":      # use a regex to match anything containing 2010-2019
-"/foo":                  # syntax error - missing final /
-------------------------------------------------------------------------------
-==============================================================================
-
-The following snippet shows an example definition of a `clicks_admin` role:
-
-[source,js]
------------
-{
-  "run_as": [ "clicks_watcher_1" ]
-  "cluster": [ "monitor" ],
-  "indices": [
-    {
-      "names": [ "events-*" ],
-      "privileges": [ "read" ],
-      "field_security" : {
-        "grant" : [ "category", "@timestamp", "message" ]
-      },
-      "query": "{\"match\": {\"category\": \"click\"}}"
-    }
-  ]
-}
------------
-
-Based on the above definition, users owning the `clicks_admin` role can:
-
-  * Impersonate the `clicks_watcher_1` user and execute requests on its behalf.
-  * Monitor the {es} cluster
-  * Read data from all indices prefixed with `events-`
-  * Within these indices, only read the events of the `click` category
-  * Within these document, only read the `category`, `@timestamp` and `message`
-    fields.
-
-TIP:  For a complete list of available <<security-privileges, cluster and indices privileges>>
-
-There are two available mechanisms to define roles: using the _Role Management APIs_
-or in local files on the {es} nodes.  {security} also supports implementing
-custom roles providers.  If you need to integrate with another system to retrieve
-user roles, you can build a custom roles provider plugin. For more information,
-see <<custom-roles-provider, Custom Roles Provider Extension>>.
-
-[float]
-[[roles-management-ui]]
-=== Role management UI
-
-{security} enables you to easily manage users and roles from within {kib}. To
-manage roles, log in to {kib} and go to *Management / Elasticsearch / Roles*. 
-
-[float]
-[[roles-management-api]]
-=== Role management API
-
-The _Role Management APIs_ enable you to add, update, remove and retrieve roles
-dynamically. When you use the APIs to manage roles in the `native` realm, the
-roles are stored in an internal {es} index. For more information and examples, 
-see {ref}/security-api-roles.html[Role Management APIs]. 
-
-[float]
-[[roles-management-file]]
-=== File-based role management
-
-Apart from the _Role Management APIs_, roles can also be defined in local
-`roles.yml` file located in `CONFIG_DIR`. This is a YAML file where each
-role definition is keyed by its name.
-
-[IMPORTANT]
-==============================
-If the same role name is used in the `roles.yml` file and through the
-_Role Management APIs_, the role found in the file will be used.
-==============================
-
-While the _Role Management APIs_ is the preferred mechanism to define roles,
-using the `roles.yml` file becomes useful if you want to define fixed roles that
-no one (beside an administrator having physical access to the {es} nodes)
-would be able to change.
-
-[IMPORTANT]
-==============================
-The `roles.yml` file is managed locally by the node and is not globally by the
-cluster. This means that with a typical multi-node cluster, the exact same
-changes need to be applied on each and every node in the cluster.
-
-A safer approach would be to apply the change on one of the nodes and have the
-`roles.yml` distributed/copied to all other nodes in the cluster (either
-manually or using a configuration management system such as Puppet or Chef).
-==============================
-
-The following snippet shows an example of the `roles.yml` file configuration:
-
-[source,yaml]
------------------------------------
-click_admins:
-  run_as: [ 'clicks_watcher_1' ]
-  cluster: [ 'monitor' ]
-  indices:
-    - names: [ 'events-*' ]
-      privileges: [ 'read' ]
-      field_security:
-        grant: ['category', '@timestamp', 'message' ]
-      query: '{"match": {"category": "click"}}'
------------------------------------
-
-{security} continuously monitors the `roles.yml` file and automatically picks
-up and applies any changes to it.
+include::privileges.asciidoc[]
 
 include::alias-privileges.asciidoc[]
 

x-pack/docs/en/security/authorization/privileges.asciidoc

@@ -1,10 +1,11 @@
+[role="xpack"]
 [[security-privileges]]
-=== Security Privileges
+=== Security privileges
 
 This section lists the privileges that you can assign to a role.
 
 [[privileges-list-cluster]]
-==== Cluster Privileges
+==== Cluster privileges
 
 [horizontal]
 `all`::
@@ -66,7 +67,7 @@ All privileges necessary for a transport client to connect.  Required by the rem
 cluster to enable <<cross-cluster-configuring,Cross Cluster Search>>.
 
 [[privileges-list-indices]]
-==== Indices Privileges
+==== Indices privileges
 
 [horizontal]
 `all`::
@@ -125,7 +126,7 @@ Privilege to create an index. A create index request may contain aliases to be
 added to the index once created. In that case the request requires the `manage`
 privilege as well, on both the index and the aliases names.
 
-==== Run As Privilege
+==== Run as privilege
 
 The `run_as` permission enables an authenticated user to submit requests on
 behalf of another user. The value can be a user name or a comma-separated list

x-pack/docs/en/security/reference.asciidoc

@@ -7,6 +7,4 @@
 * {ref}/security-api.html[Security API]
 * {ref}/xpack-commands.html[Security Commands]
 
-include::reference/privileges.asciidoc[]
-
 include::reference/files.asciidoc[]

x-pack/plugin/build.gradle

@@ -8,17 +8,11 @@ import java.nio.file.Path
 import java.nio.file.StandardCopyOption
 import org.elasticsearch.gradle.test.RunTask;
 
-apply plugin: 'elasticsearch.es-meta-plugin'
+apply plugin: 'elasticsearch.standalone-rest-test'
+apply plugin: 'elasticsearch.rest-test'
 
 archivesBaseName = 'x-pack'
 
-es_meta_plugin {
-  name = 'x-pack'
-  description = 'Elasticsearch Expanded Pack Plugin'
-  plugins = ['core', 'deprecation', 'graph', 'logstash',
-             'ml', 'monitoring', 'security', 'upgrade', 'watcher', 'sql', 'rollup', 'index-lifecycle']
-}
-
 dependencies {
   testCompile project(path: xpackModule('core'), configuration: 'testArtifacts')
 }

x-pack/plugin/core/src/main/bin/x-pack-env

@@ -5,4 +5,4 @@
 # you may not use this file except in compliance with the Elastic License.
 
 # include x-pack-core jars in classpath
-ES_CLASSPATH="$ES_CLASSPATH:$ES_HOME/modules/x-pack/x-pack-core/*"
+ES_CLASSPATH="$ES_CLASSPATH:$ES_HOME/modules/x-pack-core/*"

x-pack/plugin/core/src/main/bin/x-pack-env.bat

@@ -2,4 +2,4 @@ rem Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
 rem or more contributor license agreements. Licensed under the Elastic License;
 rem you may not use this file except in compliance with the Elastic License.
 
-set ES_CLASSPATH=!ES_CLASSPATH!;!ES_HOME!/modules/x-pack/x-pack-core/*
+set ES_CLASSPATH=!ES_CLASSPATH!;!ES_HOME!/modules/x-pack-core/*

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/action/GetJobsStatsAction.java

@@ -5,11 +5,11 @@
  */
 package org.elasticsearch.xpack.core.ml.action;
 
+import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.Version;
 import org.elasticsearch.action.Action;
 import org.elasticsearch.action.ActionRequestBuilder;
 import org.elasticsearch.action.ActionRequestValidationException;
-import org.elasticsearch.action.FailedNodeException;
 import org.elasticsearch.action.TaskOperationFailure;
 import org.elasticsearch.action.support.tasks.BaseTasksRequest;
 import org.elasticsearch.action.support.tasks.BaseTasksResponse;
@@ -297,7 +297,7 @@ public class GetJobsStatsAction extends Action<GetJobsStatsAction.Request, GetJo
             this.jobsStats = jobsStats;
         }
 
-        public Response(List<TaskOperationFailure> taskFailures, List<? extends FailedNodeException> nodeFailures,
+        public Response(List<TaskOperationFailure> taskFailures, List<? extends ElasticsearchException> nodeFailures,
                  QueryPage<JobStats> jobsStats) {
             super(taskFailures, nodeFailures);
             this.jobsStats = jobsStats;

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/action/TransportDeleteExpiredDataAction.java

@@ -15,6 +15,7 @@ import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
+import org.elasticsearch.xpack.core.ClientHelper;
 import org.elasticsearch.xpack.core.ml.action.DeleteExpiredDataAction;
 import org.elasticsearch.xpack.ml.MachineLearning;
 import org.elasticsearch.xpack.ml.job.retention.ExpiredForecastsRemover;
@@ -40,7 +41,7 @@ public class TransportDeleteExpiredDataAction extends HandledTransportAction<Del
                                             Client client, ClusterService clusterService) {
         super(settings, DeleteExpiredDataAction.NAME, threadPool, transportService, actionFilters, indexNameExpressionResolver,
                 DeleteExpiredDataAction.Request::new);
-        this.client = client;
+        this.client = ClientHelper.clientWithOrigin(client, ClientHelper.ML_ORIGIN);
         this.clusterService = clusterService;
     }
 

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/retention/ExpiredForecastsRemover.java

@@ -45,6 +45,10 @@ import java.util.Objects;
  * Removes up to {@link #MAX_FORECASTS} forecasts (stats + forecasts docs) that have expired.
  * A forecast is deleted if its expiration timestamp is earlier
  * than the start of the current day (local time-zone).
+ *
+ * This is expected to be used by actions requiring admin rights. Thus,
+ * it is also expected that the provided client will be a client with the
+ * ML origin so that permissions to manage ML indices are met.
  */
 public class ExpiredForecastsRemover implements MlDataRemover {
 

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/retention/ExpiredModelSnapshotsRemover.java

@@ -34,6 +34,10 @@ import java.util.Objects;
  * of their respective job with the exception of the currently used snapshot.
  * A snapshot is deleted if its timestamp is earlier than the start of the
  * current day (local time-zone) minus the retention period.
+ *
+ * This is expected to be used by actions requiring admin rights. Thus,
+ * it is also expected that the provided client will be a client with the
+ * ML origin so that permissions to manage ML indices are met.
  */
 public class ExpiredModelSnapshotsRemover extends AbstractExpiredJobDataRemover {
 

x-pack/plugin/ml/src/main/java/org/elasticsearch/xpack/ml/job/retention/ExpiredResultsRemover.java

@@ -33,14 +33,15 @@ import java.time.ZonedDateTime;
 import java.time.format.DateTimeFormatter;
 import java.util.Objects;
 
-import static org.elasticsearch.xpack.core.ClientHelper.ML_ORIGIN;
-import static org.elasticsearch.xpack.core.ClientHelper.executeAsyncWithOrigin;
-
 /**
  * Removes all results that have expired the configured retention time
  * of their respective job. A result is deleted if its timestamp is earlier
  * than the start of the current day (local time-zone) minus the retention
  * period.
+ *
+ * This is expected to be used by actions requiring admin rights. Thus,
+ * it is also expected that the provided client will be a client with the
+ * ML origin so that permissions to manage ML indices are met.
  */
 public class ExpiredResultsRemover extends AbstractExpiredJobDataRemover {
 
@@ -65,7 +66,7 @@ public class ExpiredResultsRemover extends AbstractExpiredJobDataRemover {
         LOGGER.debug("Removing results of job [{}] that have a timestamp before [{}]", job.getId(), cutoffEpochMs);
         DeleteByQueryRequest request = createDBQRequest(job, cutoffEpochMs);
 
-        executeAsyncWithOrigin(client, ML_ORIGIN, DeleteByQueryAction.INSTANCE, request, new ActionListener<BulkByScrollResponse>() {
+        client.execute(DeleteByQueryAction.INSTANCE, request, new ActionListener<BulkByScrollResponse>() {
             @Override
             public void onResponse(BulkByScrollResponse bulkByScrollResponse) {
                 try {

x-pack/plugin/security/src/main/bin/x-pack-security-env

@@ -7,4 +7,4 @@
 source "`dirname "$0"`"/x-pack-env
 
 # include x-pack-security jars in classpath
-ES_CLASSPATH="$ES_CLASSPATH:$ES_HOME/modules/x-pack/x-pack-security/*"
+ES_CLASSPATH="$ES_CLASSPATH:$ES_HOME/modules/x-pack-security/*"

x-pack/plugin/security/src/main/bin/x-pack-security-env.bat

@@ -4,4 +4,4 @@ rem you may not use this file except in compliance with the Elastic License.
 
 call "%~dp0x-pack-env.bat" || exit /b 1
 
-set ES_CLASSPATH=!ES_CLASSPATH!;!ES_HOME!/modules/x-pack/x-pack-security/*
+set ES_CLASSPATH=!ES_CLASSPATH!;!ES_HOME!/modules/x-pack-security/*

x-pack/plugin/security/src/test/java/org/elasticsearch/license/LicensingTests.java

@@ -53,7 +53,8 @@ import static org.hamcrest.Matchers.hasItem;
 import static org.hamcrest.Matchers.is;
 import static org.hamcrest.Matchers.notNullValue;
 
-@TestLogging("org.elasticsearch.cluster.service:TRACE,org.elasticsearch.discovery.zen:TRACE")
+@TestLogging("org.elasticsearch.cluster.service:TRACE,org.elasticsearch.discovery.zen:TRACE,org.elasticsearch.action.search:TRACE," +
+    "org.elasticsearch.search:TRACE")
 public class LicensingTests extends SecurityIntegTestCase {
     public static final String ROLES =
             SecuritySettingsSource.TEST_ROLE + ":\n" +

x-pack/plugin/sql/jdbc/src/main/java/org/elasticsearch/xpack/sql/jdbc/net/client/JdbcHttpClient.java

@@ -8,6 +8,7 @@ package org.elasticsearch.xpack.sql.jdbc.net.client;
 import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.xpack.sql.client.HttpClient;
+import org.elasticsearch.xpack.sql.client.shared.Version;
 import org.elasticsearch.xpack.sql.jdbc.jdbc.JdbcConfiguration;
 import org.elasticsearch.xpack.sql.jdbc.net.protocol.ColumnInfo;
 import org.elasticsearch.xpack.sql.jdbc.net.protocol.InfoResponse;
@@ -79,7 +80,8 @@ public class JdbcHttpClient {
 
     private InfoResponse fetchServerInfo() throws SQLException {
         MainResponse mainResponse = httpClient.serverInfo();
-        return new InfoResponse(mainResponse.getClusterName(), mainResponse.getVersion().major, mainResponse.getVersion().minor);
+        Version version = Version.fromString(mainResponse.getVersion());
+        return new InfoResponse(mainResponse.getClusterName(), version.major, version.minor);
     }
 
     /**

x-pack/plugin/sql/sql-cli/src/main/java/org/elasticsearch/xpack/sql/cli/command/CliSession.java

@@ -65,8 +65,9 @@ public class CliSession {
         } catch (SQLException ex) {
             throw new ClientException(ex);
         }
+        Version version = Version.fromString(response.getVersion());
         // TODO: We can relax compatibility requirement later when we have a better idea about protocol compatibility guarantees
-        if (response.getVersion().major != Version.CURRENT.major || response.getVersion().minor != Version.CURRENT.minor) {
+        if (version.major != Version.CURRENT.major || version.minor != Version.CURRENT.minor) {
             throw new ClientException("This alpha version of CLI is only compatible with Elasticsearch version " +
                     Version.CURRENT.toString());
         }

x-pack/plugin/sql/sql-cli/src/main/java/org/elasticsearch/xpack/sql/cli/command/ServerInfoCliCommand.java

@@ -31,7 +31,7 @@ public class ServerInfoCliCommand extends AbstractServerCliCommand {
         terminal.line()
                 .text("Node:").em(info.getNodeName())
                 .text(" Cluster:").em(info.getClusterName())
-                .text(" Version:").em(info.getVersion().toString())
+                .text(" Version:").em(info.getVersion())
                 .ln();
         return true;
     }

x-pack/plugin/sql/sql-cli/src/test/java/org/elasticsearch/xpack/sql/cli/CliSessionTests.java

@@ -27,7 +27,7 @@ public class CliSessionTests extends ESTestCase {
 
     public void testProperConnection() throws Exception {
         HttpClient httpClient = mock(HttpClient.class);
-        when(httpClient.serverInfo()).thenReturn(new MainResponse(randomAlphaOfLength(5), org.elasticsearch.Version.CURRENT,
+        when(httpClient.serverInfo()).thenReturn(new MainResponse(randomAlphaOfLength(5), org.elasticsearch.Version.CURRENT.toString(),
                 ClusterName.DEFAULT.value(), UUIDs.randomBase64UUID(), Build.CURRENT));
         CliSession cliSession = new CliSession(httpClient);
         cliSession.checkConnection();
@@ -57,7 +57,7 @@ public class CliSessionTests extends ESTestCase {
 
         }
         when(httpClient.serverInfo()).thenReturn(new MainResponse(randomAlphaOfLength(5),
-                org.elasticsearch.Version.fromString(major + "." + minor + ".23"),
+                org.elasticsearch.Version.fromString(major + "." + minor + ".23").toString(),
                 ClusterName.DEFAULT.value(), UUIDs.randomBase64UUID(), Build.CURRENT));
         CliSession cliSession = new CliSession(httpClient);
         expectThrows(ClientException.class, cliSession::checkConnection);

x-pack/plugin/sql/sql-cli/src/test/java/org/elasticsearch/xpack/sql/cli/command/ServerInfoCliCommandTests.java

@@ -35,7 +35,7 @@ public class ServerInfoCliCommandTests extends ESTestCase {
         TestTerminal testTerminal = new TestTerminal();
         HttpClient client = mock(HttpClient.class);
         CliSession cliSession = new CliSession(client);
-        when(client.serverInfo()).thenReturn(new MainResponse("my_node", org.elasticsearch.Version.fromString("1.2.3"),
+        when(client.serverInfo()).thenReturn(new MainResponse("my_node", "1.2.3",
                 new ClusterName("my_cluster").value(), UUIDs.randomBase64UUID(), Build.CURRENT));
         ServerInfoCliCommand cliCommand = new ServerInfoCliCommand();
         assertTrue(cliCommand.handle(testTerminal, cliSession, "info"));

x-pack/plugin/sql/sql-proto/src/main/java/org/elasticsearch/xpack/sql/proto/MainResponse.java

@@ -7,7 +7,6 @@
 package org.elasticsearch.xpack.sql.proto;
 
 import org.elasticsearch.Build;
-import org.elasticsearch.Version;
 import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ObjectParser;
 import org.elasticsearch.common.xcontent.XContentParser;
@@ -19,8 +18,7 @@ import java.util.Objects;
  */
 public class MainResponse {
     private String nodeName;
-    // TODO: Add parser for Version
-    private Version version;
+    private String version;
     private String clusterName;
     private String clusterUuid;
     // TODO: Add parser for Build
@@ -29,7 +27,7 @@ public class MainResponse {
     private MainResponse() {
     }
 
-    public MainResponse(String nodeName, Version version, String clusterName, String clusterUuid, Build build) {
+    public MainResponse(String nodeName, String version, String clusterName, String clusterUuid, Build build) {
         this.nodeName = nodeName;
         this.version = version;
         this.clusterName = clusterName;
@@ -41,7 +39,7 @@ public class MainResponse {
         return nodeName;
     }
 
-    public Version getVersion() {
+    public String getVersion() {
         return version;
     }
 
@@ -76,7 +74,7 @@ public class MainResponse {
                     (String) value.get("build_hash"),
                     (String) value.get("build_date"),
                     (boolean) value.get("build_snapshot"));
-            response.version = Version.fromString((String) value.get("number"));
+            response.version = (String) value.get("number");
         }, (parser, context) -> parser.map(), new ParseField("version"));
     }
 

x-pack/plugin/watcher/src/main/bin/x-pack-watcher-env

@@ -7,4 +7,4 @@
 source "`dirname "$0"`"/x-pack-env
 
 # include x-pack-security jars in classpath
-ES_CLASSPATH="$ES_CLASSPATH:$ES_HOME/modules/x-pack/x-pack-watcher/*"
+ES_CLASSPATH="$ES_CLASSPATH:$ES_HOME/modules/x-pack-watcher/*"

x-pack/plugin/watcher/src/main/bin/x-pack-watcher-env.bat

@@ -4,4 +4,4 @@ rem you may not use this file except in compliance with the Elastic License.
 
 call "%~dp0x-pack-env.bat" || exit /b 1
 
-set ES_CLASSPATH=!ES_CLASSPATH!;!ES_HOME!/modules/x-pack/x-pack-watcher/*
+set ES_CLASSPATH=!ES_CLASSPATH!;!ES_HOME!/modules/x-pack-watcher/*

x-pack/qa/vagrant/build.gradle

@@ -11,41 +11,6 @@ esvagrant {
 }
 
 dependencies {
-    // Packaging tests use the x-pack meta plugin
-    packaging project(path: xpackProject('plugin').path, configuration: 'zip')
-
     // Inherit Bats test utils from :qa:vagrant project
     packaging project(path: ':qa:vagrant', configuration: 'packaging')
 }
-
-Map<String, List<String>> metaPlugins = [:]
-for (Project metaPlugin : project.rootProject.subprojects) {
-    if (metaPlugin.plugins.hasPlugin(MetaPluginBuildPlugin)) {
-        MetaPluginPropertiesExtension extension = metaPlugin.extensions.findByName('es_meta_plugin')
-        if (extension != null) {
-            List<String> plugins = []
-            metaPlugin.subprojects.each {
-                if (extension.plugins.contains(it.name)) {
-                    Project plugin = (Project) it
-                    if (plugin.plugins.hasPlugin(PluginBuildPlugin)) {
-                        PluginPropertiesExtension esplugin = plugin.extensions.findByName('esplugin')
-                        if (esplugin != null) {
-                            plugins.add(esplugin.name)
-                        }
-                    }
-                }
-            }
-            metaPlugins.put(extension.name, plugins.toSorted())
-        }
-    }
-}
-
-setupPackagingTest {
-    doLast {
-        metaPlugins.each{ name, plugins ->
-            File expectedMetaPlugins = file("build/plugins/${name}.expected")
-            expectedMetaPlugins.parentFile.mkdirs()
-            expectedMetaPlugins.setText(plugins.join('\n'), 'UTF-8')
-        }
-    }
-}