Merge remote-tracking branch 'upstream/feature-suggest-refactoring' into suggester-wiring-refactoring

core/src/main/java/org/elasticsearch/action/admin/cluster/node/tasks/cancel/CancelTasksRequest.java

@@ -53,12 +53,18 @@ public class CancelTasksRequest extends BaseTasksRequest<CancelTasksRequest> {
         return super.match(task) && task instanceof CancellableTask;
     }
 
-    public CancelTasksRequest reason(String reason) {
+    /**
+     * Set the reason for canceling the task.
+     */
+    public CancelTasksRequest setReason(String reason) {
         this.reason = reason;
         return this;
     }
 
-    public String reason() {
+    /**
+     * The reason for canceling the task.
+     */
+    public String getReason() {
         return reason;
     }
 }

core/src/main/java/org/elasticsearch/action/admin/cluster/node/tasks/cancel/TransportCancelTasksAction.java

@@ -84,21 +84,21 @@ public class TransportCancelTasksAction extends TransportTasksAction<Cancellable
     }
 
     protected void processTasks(CancelTasksRequest request, Consumer<CancellableTask> operation) {
-        if (request.taskId().isSet() == false) {
+        if (request.getTaskId().isSet() == false) {
             // we are only checking one task, we can optimize it
-            CancellableTask task = taskManager.getCancellableTask(request.taskId().getId());
+            CancellableTask task = taskManager.getCancellableTask(request.getTaskId().getId());
             if (task != null) {
                 if (request.match(task)) {
                     operation.accept(task);
                 } else {
-                    throw new IllegalArgumentException("task [" + request.taskId() + "] doesn't support this operation");
+                    throw new IllegalArgumentException("task [" + request.getTaskId() + "] doesn't support this operation");
                 }
             } else {
-                if (taskManager.getTask(request.taskId().getId()) != null) {
+                if (taskManager.getTask(request.getTaskId().getId()) != null) {
                     // The task exists, but doesn't support cancellation
-                    throw new IllegalArgumentException("task [" + request.taskId() + "] doesn't support cancellation");
+                    throw new IllegalArgumentException("task [" + request.getTaskId() + "] doesn't support cancellation");
                 } else {
-                    throw new ResourceNotFoundException("task [{}] doesn't support cancellation", request.taskId());
+                    throw new ResourceNotFoundException("task [{}] doesn't support cancellation", request.getTaskId());
                 }
             }
         } else {
@@ -113,14 +113,14 @@ public class TransportCancelTasksAction extends TransportTasksAction<Cancellable
     @Override
     protected synchronized TaskInfo taskOperation(CancelTasksRequest request, CancellableTask cancellableTask) {
         final BanLock banLock = new BanLock(nodes -> removeBanOnNodes(cancellableTask, nodes));
-        Set<String> childNodes = taskManager.cancel(cancellableTask, request.reason(), banLock::onTaskFinished);
+        Set<String> childNodes = taskManager.cancel(cancellableTask, request.getReason(), banLock::onTaskFinished);
         if (childNodes != null) {
             if (childNodes.isEmpty()) {
                 logger.trace("cancelling task {} with no children", cancellableTask.getId());
                 return cancellableTask.taskInfo(clusterService.localNode(), false);
             } else {
                 logger.trace("cancelling task {} with children on nodes [{}]", cancellableTask.getId(), childNodes);
-                setBanOnNodes(request.reason(), cancellableTask, childNodes, banLock);
+                setBanOnNodes(request.getReason(), cancellableTask, childNodes, banLock);
                 return cancellableTask.taskInfo(clusterService.localNode(), false);
             }
         } else {

core/src/main/java/org/elasticsearch/action/admin/cluster/node/tasks/list/ListTasksRequest.java

@@ -31,31 +31,49 @@ import java.io.IOException;
 public class ListTasksRequest extends BaseTasksRequest<ListTasksRequest> {
 
     private boolean detailed = false;
+    private boolean waitForCompletion = false;
 
     /**
      * Should the detailed task information be returned.
      */
-    public boolean detailed() {
+    public boolean getDetailed() {
         return this.detailed;
     }
 
     /**
      * Should the detailed task information be returned.
      */
-    public ListTasksRequest detailed(boolean detailed) {
+    public ListTasksRequest setDetailed(boolean detailed) {
         this.detailed = detailed;
         return this;
     }
 
+    /**
+     * Should this request wait for all found tasks to complete?
+     */
+    public boolean getWaitForCompletion() {
+        return waitForCompletion;
+    }
+
+    /**
+     * Should this request wait for all found tasks to complete?
+     */
+    public ListTasksRequest setWaitForCompletion(boolean waitForCompletion) {
+        this.waitForCompletion = waitForCompletion;
+        return this;
+    }
+
     @Override
     public void readFrom(StreamInput in) throws IOException {
         super.readFrom(in);
         detailed = in.readBoolean();
+        waitForCompletion = in.readBoolean();
     }
 
     @Override
     public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
         out.writeBoolean(detailed);
+        out.writeBoolean(waitForCompletion);
     }
 }

core/src/main/java/org/elasticsearch/action/admin/cluster/node/tasks/list/ListTasksRequestBuilder.java

@@ -35,7 +35,15 @@ public class ListTasksRequestBuilder extends TasksRequestBuilder<ListTasksReques
      * Should detailed task information be returned.
      */
     public ListTasksRequestBuilder setDetailed(boolean detailed) {
-        request.detailed(detailed);
+        request.setDetailed(detailed);
+        return this;
+    }
+
+    /**
+     * Should this request wait for all found tasks to complete?
+     */
+    public final ListTasksRequestBuilder setWaitForCompletion(boolean waitForCompletion) {
+        request.setWaitForCompletion(waitForCompletion);
         return this;
     }
 }

core/src/main/java/org/elasticsearch/action/admin/cluster/node/tasks/list/TransportListTasksAction.java

@@ -19,6 +19,8 @@
 
 package org.elasticsearch.action.admin.cluster.node.tasks.list;
 
+import org.elasticsearch.ElasticsearchException;
+import org.elasticsearch.ElasticsearchTimeoutException;
 import org.elasticsearch.action.FailedNodeException;
 import org.elasticsearch.action.TaskOperationFailure;
 import org.elasticsearch.action.support.ActionFilters;
@@ -29,18 +31,24 @@ import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.tasks.Task;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
 
 import java.io.IOException;
-import java.util.Collection;
 import java.util.List;
+import java.util.function.Consumer;
+
+import static org.elasticsearch.common.unit.TimeValue.timeValueMillis;
+import static org.elasticsearch.common.unit.TimeValue.timeValueSeconds;
 
 /**
  *
  */
 public class TransportListTasksAction extends TransportTasksAction<Task, ListTasksRequest, ListTasksResponse, TaskInfo> {
+    private static final TimeValue WAIT_FOR_COMPLETION_POLL = timeValueMillis(100);
+    private static final TimeValue DEFAULT_WAIT_FOR_COMPLETION_TIMEOUT = timeValueSeconds(30);
 
     @Inject
     public TransportListTasksAction(Settings settings, ClusterName clusterName, ThreadPool threadPool, ClusterService clusterService, TransportService transportService, ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver) {
@@ -59,7 +67,34 @@ public class TransportListTasksAction extends TransportTasksAction<Task, ListTas
 
     @Override
     protected TaskInfo taskOperation(ListTasksRequest request, Task task) {
-        return task.taskInfo(clusterService.localNode(), request.detailed());
+        return task.taskInfo(clusterService.localNode(), request.getDetailed());
+    }
+
+    @Override
+    protected void processTasks(ListTasksRequest request, Consumer<Task> operation) {
+        if (false == request.getWaitForCompletion()) {
+            super.processTasks(request, operation);
+            return;
+        }
+        // If we should wait for completion then we have to intercept every found task and wait for it to leave the manager.
+        TimeValue timeout = request.getTimeout();
+        if (timeout == null) {
+            timeout = DEFAULT_WAIT_FOR_COMPLETION_TIMEOUT;
+        }
+        long timeoutTime = System.nanoTime() + timeout.nanos();
+        super.processTasks(request, operation.andThen((Task t) -> {
+            while (System.nanoTime() - timeoutTime < 0) {
+                if (taskManager.getTask(t.getId()) == null) {
+                    return;
+                }
+                try {
+                    Thread.sleep(WAIT_FOR_COMPLETION_POLL.millis());
+                } catch (InterruptedException e) {
+                    throw new ElasticsearchException("Interrupted waiting for completion of [{}]", e, t);
+                }
+            }
+            throw new ElasticsearchTimeoutException("Timed out waiting for completion of [{}]", t);
+        }));
     }
 
     @Override

core/src/main/java/org/elasticsearch/action/admin/indices/cache/clear/TransportClearIndicesCacheAction.java

@@ -77,7 +77,7 @@ public class TransportClearIndicesCacheAction extends TransportBroadcastByNodeAc
 
     @Override
     protected EmptyResult shardOperation(ClearIndicesCacheRequest request, ShardRouting shardRouting) {
-        IndexService service = indicesService.indexService(shardRouting.getIndexName());
+        IndexService service = indicesService.indexService(shardRouting.index());
         if (service != null) {
             IndexShard shard = service.getShardOrNull(shardRouting.id());
             boolean clearedAtLeastOne = false;

core/src/main/java/org/elasticsearch/action/admin/indices/segments/TransportIndicesSegmentsAction.java

@@ -93,7 +93,7 @@ public class TransportIndicesSegmentsAction extends TransportBroadcastByNodeActi
 
     @Override
     protected ShardSegments shardOperation(IndicesSegmentsRequest request, ShardRouting shardRouting) {
-        IndexService indexService = indicesService.indexServiceSafe(shardRouting.getIndexName());
+        IndexService indexService = indicesService.indexServiceSafe(shardRouting.index());
         IndexShard indexShard = indexService.getShard(shardRouting.id());
         return new ShardSegments(indexShard.routingEntry(), indexShard.segments(request.verbose()));
     }

core/src/main/java/org/elasticsearch/action/bulk/TransportShardBulkAction.java

@@ -47,6 +47,7 @@ import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentHelper;
 import org.elasticsearch.common.xcontent.XContentType;
+import org.elasticsearch.index.Index;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.VersionType;
 import org.elasticsearch.index.engine.Engine;
@@ -104,8 +105,9 @@ public class TransportShardBulkAction extends TransportReplicationAction<BulkSha
 
     @Override
     protected Tuple<BulkShardResponse, BulkShardRequest> shardOperationOnPrimary(MetaData metaData, BulkShardRequest request) {
-        final IndexService indexService = indicesService.indexServiceSafe(request.index());
-        final IndexShard indexShard = indexService.getShard(request.shardId().id());
+        ShardId shardId = request.shardId();
+        final IndexService indexService = indicesService.indexServiceSafe(shardId.getIndex());
+        final IndexShard indexShard = indexService.getShard(shardId.getId());
 
         long[] preVersions = new long[request.items().length];
         VersionType[] preVersionTypes = new VersionType[request.items().length];

core/src/main/java/org/elasticsearch/action/search/ShardSearchFailure.java

@@ -32,8 +32,6 @@ import org.elasticsearch.search.SearchShardTarget;
 
 import java.io.IOException;
 
-import static org.elasticsearch.search.SearchShardTarget.readSearchShardTarget;
-
 /**
  * Represents a failure to search on a specific shard.
  */
@@ -106,7 +104,7 @@ public class ShardSearchFailure implements ShardOperationFailedException {
     @Override
     public int shardId() {
         if (shardTarget != null) {
-            return shardTarget.shardId();
+            return shardTarget.shardId().id();
         }
         return -1;
     }
@@ -133,7 +131,7 @@ public class ShardSearchFailure implements ShardOperationFailedException {
     @Override
     public void readFrom(StreamInput in) throws IOException {
         if (in.readBoolean()) {
-            shardTarget = readSearchShardTarget(in);
+            shardTarget = new SearchShardTarget(in);
         }
         reason = in.readString();
         status = RestStatus.readFrom(in);

core/src/main/java/org/elasticsearch/action/support/replication/TransportReplicationAction.java

@@ -53,6 +53,7 @@ import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.util.concurrent.AbstractRunnable;
 import org.elasticsearch.common.util.concurrent.ConcurrentCollections;
 import org.elasticsearch.common.util.concurrent.ThreadContext;
+import org.elasticsearch.index.Index;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.engine.VersionConflictEngineException;
 import org.elasticsearch.index.shard.IndexShard;
@@ -372,18 +373,18 @@ public abstract class TransportReplicationAction<Request extends ReplicationRequ
         }
 
         private void failReplicaIfNeeded(Throwable t) {
-            String index = request.shardId().getIndex().getName();
+            Index index = request.shardId().getIndex();
             int shardId = request.shardId().id();
             logger.trace("failure on replica [{}][{}], action [{}], request [{}]", t, index, shardId, actionName, request);
             if (ignoreReplicaException(t) == false) {
                 IndexService indexService = indicesService.indexService(index);
                 if (indexService == null) {
-                    logger.debug("ignoring failed replica [{}][{}] because index was already removed.", index, shardId);
+                    logger.debug("ignoring failed replica {}[{}] because index was already removed.", index, shardId);
                     return;
                 }
                 IndexShard indexShard = indexService.getShardOrNull(shardId);
                 if (indexShard == null) {
-                    logger.debug("ignoring failed replica [{}][{}] because index was already removed.", index, shardId);
+                    logger.debug("ignoring failed replica {}[{}] because index was already removed.", index, shardId);
                     return;
                 }
                 indexShard.failShard(actionName + " failed on replica", t);

core/src/main/java/org/elasticsearch/action/support/single/instance/InstanceShardOperationRequest.java

@@ -27,6 +27,7 @@ import org.elasticsearch.action.support.IndicesOptions;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.index.shard.ShardId;
 
 import java.io.IOException;
 import java.util.concurrent.TimeUnit;
@@ -42,8 +43,8 @@ public abstract class InstanceShardOperationRequest<Request extends InstanceShar
     protected TimeValue timeout = DEFAULT_TIMEOUT;
 
     protected String index;
-    // -1 means its not set, allows to explicitly direct a request to a specific shard
-    protected int shardId = -1;
+    // null means its not set, allows to explicitly direct a request to a specific shard
+    protected ShardId shardId = null;
 
     private String concreteIndex;
 
@@ -115,7 +116,11 @@ public abstract class InstanceShardOperationRequest<Request extends InstanceShar
     public void readFrom(StreamInput in) throws IOException {
         super.readFrom(in);
         index = in.readString();
-        shardId = in.readInt();
+        if (in.readBoolean()) {
+            shardId = ShardId.readShardId(in);
+        } else {
+            shardId = null;
+        }
         timeout = TimeValue.readTimeValue(in);
         concreteIndex = in.readOptionalString();
     }
@@ -124,7 +129,7 @@ public abstract class InstanceShardOperationRequest<Request extends InstanceShar
     public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
         out.writeString(index);
-        out.writeInt(shardId);
+        out.writeOptionalStreamable(shardId);
         timeout.writeTo(out);
         out.writeOptionalString(concreteIndex);
     }

core/src/main/java/org/elasticsearch/action/support/single/instance/TransportInstanceSingleOperationAction.java

@@ -172,7 +172,7 @@ public abstract class TransportInstanceSingleOperationAction<Request extends Ins
                 return;
             }
 
-            request.shardId = shardIt.shardId().id();
+            request.shardId = shardIt.shardId();
             DiscoveryNode node = nodes.get(shard.currentNodeId());
             transportService.sendRequest(node, shardActionName, request, transportOptions(), new BaseTransportResponseHandler<Response>() {
 

core/src/main/java/org/elasticsearch/action/support/tasks/BaseTasksRequest.java

@@ -71,7 +71,7 @@ public class BaseTasksRequest<Request extends BaseTasksRequest<Request>> extends
      * Sets the list of action masks for the actions that should be returned
      */
     @SuppressWarnings("unchecked")
-    public final Request actions(String... actions) {
+    public final Request setActions(String... actions) {
         this.actions = actions;
         return (Request) this;
     }
@@ -79,16 +79,16 @@ public class BaseTasksRequest<Request extends BaseTasksRequest<Request>> extends
     /**
      * Return the list of action masks for the actions that should be returned
      */
-    public String[] actions() {
+    public String[] getActions() {
         return actions;
     }
 
-    public final String[] nodesIds() {
+    public final String[] getNodesIds() {
         return nodesIds;
     }
 
     @SuppressWarnings("unchecked")
-    public final Request nodesIds(String... nodesIds) {
+    public final Request setNodesIds(String... nodesIds) {
         this.nodesIds = nodesIds;
         return (Request) this;
     }
@@ -98,12 +98,12 @@ public class BaseTasksRequest<Request extends BaseTasksRequest<Request>> extends
      *
      * By default tasks with any ids are returned.
      */
-    public TaskId taskId() {
+    public TaskId getTaskId() {
         return taskId;
     }
 
     @SuppressWarnings("unchecked")
-    public final Request taskId(TaskId taskId) {
+    public final Request setTaskId(TaskId taskId) {
         this.taskId = taskId;
         return (Request) this;
     }
@@ -112,29 +112,29 @@ public class BaseTasksRequest<Request extends BaseTasksRequest<Request>> extends
     /**
      * Returns the parent task id that tasks should be filtered by
      */
-    public TaskId parentTaskId() {
+    public TaskId getParentTaskId() {
         return parentTaskId;
     }
 
     @SuppressWarnings("unchecked")
-    public Request parentTaskId(TaskId parentTaskId) {
+    public Request setParentTaskId(TaskId parentTaskId) {
         this.parentTaskId = parentTaskId;
         return (Request) this;
     }
 
 
-    public TimeValue timeout() {
+    public TimeValue getTimeout() {
         return this.timeout;
     }
 
     @SuppressWarnings("unchecked")
-    public final Request timeout(TimeValue timeout) {
+    public final Request setTimeout(TimeValue timeout) {
         this.timeout = timeout;
         return (Request) this;
     }
 
     @SuppressWarnings("unchecked")
-    public final Request timeout(String timeout) {
+    public final Request setTimeout(String timeout) {
         this.timeout = TimeValue.parseTimeValue(timeout, null, getClass().getSimpleName() + ".timeout");
         return (Request) this;
     }
@@ -162,11 +162,11 @@ public class BaseTasksRequest<Request extends BaseTasksRequest<Request>> extends
     }
 
     public boolean match(Task task) {
-        if (actions() != null && actions().length > 0 && Regex.simpleMatch(actions(), task.getAction()) == false) {
+        if (getActions() != null && getActions().length > 0 && Regex.simpleMatch(getActions(), task.getAction()) == false) {
             return false;
         }
-        if (taskId().isSet() == false) {
-            if(taskId().getId() != task.getId()) {
+        if (getTaskId().isSet() == false) {
+            if(getTaskId().getId() != task.getId()) {
                 return false;
             }
         }

core/src/main/java/org/elasticsearch/action/support/tasks/TasksRequestBuilder.java

@@ -35,19 +35,19 @@ public class TasksRequestBuilder <Request extends BaseTasksRequest<Request>, Res
 
     @SuppressWarnings("unchecked")
     public final RequestBuilder setNodesIds(String... nodesIds) {
-        request.nodesIds(nodesIds);
+        request.setNodesIds(nodesIds);
         return (RequestBuilder) this;
     }
 
     @SuppressWarnings("unchecked")
     public final RequestBuilder setActions(String... actions) {
-        request.actions(actions);
+        request.setActions(actions);
         return (RequestBuilder) this;
     }
 
     @SuppressWarnings("unchecked")
     public final RequestBuilder setTimeout(TimeValue timeout) {
-        request.timeout(timeout);
+        request.setTimeout(timeout);
         return (RequestBuilder) this;
     }
 }

core/src/main/java/org/elasticsearch/action/support/tasks/TransportTasksAction.java

@@ -124,25 +124,25 @@ public abstract class TransportTasksAction<
     }
 
     protected String[] resolveNodes(TasksRequest request, ClusterState clusterState) {
-        if (request.taskId().isSet()) {
-            return clusterState.nodes().resolveNodesIds(request.nodesIds());
+        if (request.getTaskId().isSet()) {
+            return clusterState.nodes().resolveNodesIds(request.getNodesIds());
         } else {
-            return new String[]{request.taskId().getNodeId()};
+            return new String[]{request.getTaskId().getNodeId()};
         }
     }
 
     protected void processTasks(TasksRequest request, Consumer<OperationTask> operation) {
-        if (request.taskId().isSet() == false) {
+        if (request.getTaskId().isSet() == false) {
             // we are only checking one task, we can optimize it
-            Task task = taskManager.getTask(request.taskId().getId());
+            Task task = taskManager.getTask(request.getTaskId().getId());
             if (task != null) {
                 if (request.match(task)) {
                     operation.accept((OperationTask) task);
                 } else {
-                    throw new ResourceNotFoundException("task [{}] doesn't support this operation", request.taskId());
+                    throw new ResourceNotFoundException("task [{}] doesn't support this operation", request.getTaskId());
                 }
             } else {
-                throw new ResourceNotFoundException("task [{}] is missing", request.taskId());
+                throw new ResourceNotFoundException("task [{}] is missing", request.getTaskId());
             }
         } else {
             for (Task task : taskManager.getTasks().values()) {
@@ -224,8 +224,8 @@ public abstract class TransportTasksAction<
                 }
             } else {
                 TransportRequestOptions.Builder builder = TransportRequestOptions.builder();
-                if (request.timeout() != null) {
-                    builder.withTimeout(request.timeout());
+                if (request.getTimeout() != null) {
+                    builder.withTimeout(request.getTimeout());
                 }
                 builder.withCompress(transportCompress());
                 for (int i = 0; i < nodesIds.length; i++) {

core/src/main/java/org/elasticsearch/action/termvectors/TransportShardMultiTermsVectorAction.java

@@ -75,12 +75,12 @@ public class TransportShardMultiTermsVectorAction extends TransportSingleShardAc
 
     @Override
     protected MultiTermVectorsShardResponse shardOperation(MultiTermVectorsShardRequest request, ShardId shardId) {
-        MultiTermVectorsShardResponse response = new MultiTermVectorsShardResponse();
+        final MultiTermVectorsShardResponse response = new MultiTermVectorsShardResponse();
+        final IndexService indexService = indicesService.indexServiceSafe(shardId.getIndex());
+        final IndexShard indexShard = indexService.getShard(shardId.id());
         for (int i = 0; i < request.locations.size(); i++) {
             TermVectorsRequest termVectorsRequest = request.requests.get(i);
             try {
-                IndexService indexService = indicesService.indexServiceSafe(request.index());
-                IndexShard indexShard = indexService.getShard(shardId.id());
                 TermVectorsResponse termVectorsResponse = TermVectorsService.getTermVectors(indexShard, termVectorsRequest);
                 termVectorsResponse.updateTookInMillis(termVectorsRequest.startTime());
                 response.add(request.locations.get(i), termVectorsResponse);

core/src/main/java/org/elasticsearch/action/update/TransportUpdateAction.java

@@ -51,6 +51,7 @@ import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.engine.VersionConflictEngineException;
 import org.elasticsearch.index.shard.IndexShard;
+import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.indices.IndexAlreadyExistsException;
 import org.elasticsearch.indices.IndicesService;
 import org.elasticsearch.threadpool.ThreadPool;
@@ -147,8 +148,8 @@ public class TransportUpdateAction extends TransportInstanceSingleOperationActio
 
     @Override
     protected ShardIterator shards(ClusterState clusterState, UpdateRequest request) {
-        if (request.shardId() != -1) {
-            return clusterState.routingTable().index(request.concreteIndex()).shard(request.shardId()).primaryShardIt();
+        if (request.getShardId() != null) {
+            return clusterState.routingTable().index(request.concreteIndex()).shard(request.getShardId().getId()).primaryShardIt();
         }
         ShardIterator shardIterator = clusterService.operationRouting()
                 .indexShards(clusterState, request.concreteIndex(), request.type(), request.id(), request.routing());
@@ -167,8 +168,9 @@ public class TransportUpdateAction extends TransportInstanceSingleOperationActio
     }
 
     protected void shardOperation(final UpdateRequest request, final ActionListener<UpdateResponse> listener, final int retryCount) {
-        final IndexService indexService = indicesService.indexServiceSafe(request.concreteIndex());
-        final IndexShard indexShard = indexService.getShard(request.shardId());
+        final ShardId shardId = request.getShardId();
+        final IndexService indexService = indicesService.indexServiceSafe(shardId.getIndex());
+        final IndexShard indexShard = indexService.getShard(shardId.getId());
         final UpdateHelper.Result result = updateHelper.prepare(request, indexShard);
         switch (result.operation()) {
             case UPSERT:
@@ -194,7 +196,7 @@ public class TransportUpdateAction extends TransportInstanceSingleOperationActio
                         if (e instanceof VersionConflictEngineException) {
                             if (retryCount < request.retryOnConflict()) {
                                 logger.trace("Retry attempt [{}] of [{}] on version conflict on [{}][{}][{}]",
-                                        retryCount + 1, request.retryOnConflict(), request.index(), request.shardId(), request.id());
+                                        retryCount + 1, request.retryOnConflict(), request.index(), request.getShardId(), request.id());
                                 threadPool.executor(executor()).execute(new ActionRunnable<UpdateResponse>(listener) {
                                     @Override
                                     protected void doRun() {
@@ -267,9 +269,9 @@ public class TransportUpdateAction extends TransportInstanceSingleOperationActio
                 break;
             case NONE:
                 UpdateResponse update = result.action();
-                IndexService indexServiceOrNull = indicesService.indexService(request.concreteIndex());
+                IndexService indexServiceOrNull = indicesService.indexService(shardId.getIndex());
                 if (indexServiceOrNull !=  null) {
-                    IndexShard shard = indexService.getShardOrNull(request.shardId());
+                    IndexShard shard = indexService.getShardOrNull(shardId.getId());
                     if (shard != null) {
                         shard.noopUpdate(request.type());
                     }

core/src/main/java/org/elasticsearch/action/update/UpdateRequest.java

@@ -36,6 +36,7 @@ import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.VersionType;
+import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.script.Script;
 import org.elasticsearch.script.ScriptParameterParser;
 import org.elasticsearch.script.ScriptParameterParser.ScriptParameterValue;
@@ -88,7 +89,7 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
     }
 
     public UpdateRequest(String index, String type, String id) {
-        this.index = index;
+        super(index);
         this.type = type;
         this.id = id;
     }
@@ -195,7 +196,7 @@ public class UpdateRequest extends InstanceShardOperationRequest<UpdateRequest>
         return parent;
     }
 
-    int shardId() {
+    public ShardId getShardId() {
         return this.shardId;
     }
 

core/src/main/java/org/elasticsearch/bootstrap/BootstrapCheck.java

@@ -225,7 +225,7 @@ final class BootstrapCheck {
 
     static class MaxNumberOfThreadsCheck implements Check {
 
-        private final long maxNumberOfThreadsThreshold = 1 << 15;
+        private final long maxNumberOfThreadsThreshold = 1 << 11;
 
         @Override
         public boolean check() {

core/src/main/java/org/elasticsearch/cluster/ClusterChangedEvent.java

@@ -23,6 +23,7 @@ import com.carrotsearch.hppc.cursors.ObjectCursor;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
 import org.elasticsearch.cluster.metadata.MetaData;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
+import org.elasticsearch.index.Index;
 
 import java.util.ArrayList;
 import java.util.Collections;
@@ -120,7 +121,7 @@ public class ClusterChangedEvent {
     /**
      * Returns the indices deleted in this event
      */
-    public List<String> indicesDeleted() {
+    public List<Index> indicesDeleted() {
         // If the new cluster state has a new cluster UUID, the likely scenario is that a node was elected
         // master that has had its data directory wiped out, in which case we don't want to delete the indices and lose data;
         // rather we want to import them as dangling indices instead.  So we check here if the cluster UUID differs from the previous
@@ -131,17 +132,18 @@ public class ClusterChangedEvent {
         if (metaDataChanged() == false || isNewCluster()) {
             return Collections.emptyList();
         }
-        List<String> deleted = null;
-        for (ObjectCursor<String> cursor : previousState.metaData().indices().keys()) {
-            String index = cursor.value;
-            if (!state.metaData().hasIndex(index)) {
+        List<Index> deleted = null;
+        for (ObjectCursor<IndexMetaData> cursor : previousState.metaData().indices().values()) {
+            IndexMetaData index = cursor.value;
+            IndexMetaData current = state.metaData().index(index.getIndex().getName());
+            if (current == null || index.getIndexUUID().equals(current.getIndexUUID()) == false) {
                 if (deleted == null) {
                     deleted = new ArrayList<>();
                 }
-                deleted.add(index);
+                deleted.add(index.getIndex());
             }
         }
-        return deleted == null ? Collections.<String>emptyList() : deleted;
+        return deleted == null ? Collections.<Index>emptyList() : deleted;
     }
 
     /**

core/src/main/java/org/elasticsearch/cluster/metadata/IndexNameExpressionResolver.java

@@ -686,7 +686,7 @@ public class IndexNameExpressionResolver extends AbstractComponent {
         }
 
         private boolean isEmptyOrTrivialWildcard(List<String> expressions) {
-            return expressions.isEmpty() || (expressions.size() == 1 && (MetaData.ALL.equals(expressions.get(0))) || Regex.isMatchAllPattern(expressions.get(0)));
+            return expressions.isEmpty() || (expressions.size() == 1 && (MetaData.ALL.equals(expressions.get(0)) || Regex.isMatchAllPattern(expressions.get(0))));
         }
 
         private List<String> resolveEmptyOrTrivialWildcard(IndicesOptions options, MetaData metaData, boolean assertEmpty) {

core/src/main/java/org/elasticsearch/cluster/metadata/MetaDataCreateIndexService.java

@@ -53,6 +53,7 @@ import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.common.xcontent.XContentHelper;
 import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.env.Environment;
+import org.elasticsearch.index.Index;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.NodeServicesProvider;
 import org.elasticsearch.index.mapper.DocumentMapper;
@@ -188,7 +189,7 @@ public class MetaDataCreateIndexService extends AbstractComponent {
 
                     @Override
                     public ClusterState execute(ClusterState currentState) throws Exception {
-                        boolean indexCreated = false;
+                        Index createdIndex = null;
                         String removalReason = null;
                         try {
                             validate(request, currentState);
@@ -308,10 +309,9 @@ public class MetaDataCreateIndexService extends AbstractComponent {
                             // Set up everything, now locally create the index to see that things are ok, and apply
                             final IndexMetaData tmpImd = IndexMetaData.builder(request.index()).settings(actualIndexSettings).build();
                             // create the index here (on the master) to validate it can be created, as well as adding the mapping
-                            indicesService.createIndex(nodeServicesProvider, tmpImd, Collections.emptyList());
-                            indexCreated = true;
+                            final IndexService indexService = indicesService.createIndex(nodeServicesProvider, tmpImd, Collections.emptyList());
+                            createdIndex = indexService.index();
                             // now add the mappings
-                            IndexService indexService = indicesService.indexServiceSafe(request.index());
                             MapperService mapperService = indexService.mapperService();
                             // first, add the default mapping
                             if (mappings.containsKey(MapperService.DEFAULT_MAPPING)) {
@@ -415,9 +415,9 @@ public class MetaDataCreateIndexService extends AbstractComponent {
                             removalReason = "cleaning up after validating index on master";
                             return updatedState;
                         } finally {
-                            if (indexCreated) {
+                            if (createdIndex != null) {
                                 // Index was already partially created - need to clean up
-                                indicesService.removeIndex(request.index(), removalReason != null ? removalReason : "failed to create index");
+                                indicesService.removeIndex(createdIndex, removalReason != null ? removalReason : "failed to create index");
                             }
                         }
                     }

core/src/main/java/org/elasticsearch/cluster/metadata/MetaDataIndexAliasesService.java

@@ -31,6 +31,7 @@ import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.index.Index;
 import org.elasticsearch.index.IndexNotFoundException;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.NodeServicesProvider;
@@ -74,7 +75,7 @@ public class MetaDataIndexAliasesService extends AbstractComponent {
 
             @Override
             public ClusterState execute(final ClusterState currentState) {
-                List<String> indicesToClose = new ArrayList<>();
+                List<Index> indicesToClose = new ArrayList<>();
                 Map<String, IndexService> indices = new HashMap<>();
                 try {
                     for (AliasAction aliasAction : request.actions()) {
@@ -112,7 +113,7 @@ public class MetaDataIndexAliasesService extends AbstractComponent {
                                             logger.warn("[{}] failed to temporary create in order to apply alias action", e, indexMetaData.getIndex());
                                             continue;
                                         }
-                                        indicesToClose.add(indexMetaData.getIndex().getName());
+                                        indicesToClose.add(indexMetaData.getIndex());
                                     }
                                     indices.put(indexMetaData.getIndex().getName(), indexService);
                                 }
@@ -153,7 +154,7 @@ public class MetaDataIndexAliasesService extends AbstractComponent {
                     }
                     return currentState;
                 } finally {
-                    for (String index : indicesToClose) {
+                    for (Index index : indicesToClose) {
                         indicesService.removeIndex(index, "created for alias processing");
                     }
                 }

core/src/main/java/org/elasticsearch/cluster/metadata/MetaDataIndexStateService.java

@@ -19,12 +19,14 @@
 
 package org.elasticsearch.cluster.metadata;
 
+import com.carrotsearch.hppc.cursors.ObjectObjectCursor;
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.admin.indices.close.CloseIndexClusterStateUpdateRequest;
 import org.elasticsearch.action.admin.indices.open.OpenIndexClusterStateUpdateRequest;
 import org.elasticsearch.cluster.AckedClusterStateUpdateTask;
 import org.elasticsearch.cluster.ClusterService;
 import org.elasticsearch.cluster.ClusterState;
+import org.elasticsearch.cluster.RestoreInProgress;
 import org.elasticsearch.cluster.ack.ClusterStateUpdateResponse;
 import org.elasticsearch.cluster.block.ClusterBlock;
 import org.elasticsearch.cluster.block.ClusterBlockLevel;
@@ -37,11 +39,14 @@ import org.elasticsearch.common.component.AbstractComponent;
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.index.IndexNotFoundException;
+import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.rest.RestStatus;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Set;
 
 /**
  * Service responsible for submitting open/close index requests
@@ -78,7 +83,7 @@ public class MetaDataIndexStateService extends AbstractComponent {
 
             @Override
             public ClusterState execute(ClusterState currentState) {
-                List<String> indicesToClose = new ArrayList<>();
+                Set<String> indicesToClose = new HashSet<>();
                 for (String index : request.indices()) {
                     IndexMetaData indexMetaData = currentState.metaData().index(index);
                     if (indexMetaData == null) {
@@ -94,6 +99,28 @@ public class MetaDataIndexStateService extends AbstractComponent {
                     return currentState;
                 }
 
+                // Check if any of the indices to be closed are currently being restored from a snapshot and fail closing if such an index
+                // is found as closing an index that is being restored makes the index unusable (it cannot be recovered).
+                RestoreInProgress restore = currentState.custom(RestoreInProgress.TYPE);
+                if (restore != null) {
+                    Set<String> indicesToFail = null;
+                    for (RestoreInProgress.Entry entry : restore.entries()) {
+                        for (ObjectObjectCursor<ShardId, RestoreInProgress.ShardRestoreStatus> shard : entry.shards()) {
+                            if (!shard.value.state().completed()) {
+                                if (indicesToClose.contains(shard.key.getIndexName())) {
+                                    if (indicesToFail == null) {
+                                        indicesToFail = new HashSet<>();
+                                    }
+                                    indicesToFail.add(shard.key.getIndexName());
+                                }
+                            }
+                        }
+                    }
+                    if (indicesToFail != null) {
+                        throw new IllegalArgumentException("Cannot close indices that are being restored: " + indicesToFail);
+                    }
+                }
+
                 logger.info("closing indices [{}]", indicesAsString);
 
                 MetaData.Builder mdBuilder = MetaData.builder(currentState.metaData());

core/src/main/java/org/elasticsearch/cluster/metadata/MetaDataMappingService.java

@@ -36,6 +36,7 @@ import org.elasticsearch.common.compress.CompressedXContent;
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.index.Index;
 import org.elasticsearch.index.IndexNotFoundException;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.NodeServicesProvider;
@@ -112,13 +113,13 @@ public class MetaDataMappingService extends AbstractComponent {
         MetaData.Builder mdBuilder = MetaData.builder(currentState.metaData());
 
         for (Map.Entry<String, List<RefreshTask>> entry : tasksPerIndex.entrySet()) {
-            String index = entry.getKey();
-            IndexMetaData indexMetaData = mdBuilder.get(index);
+            IndexMetaData indexMetaData = mdBuilder.get(entry.getKey());
             if (indexMetaData == null) {
                 // index got deleted on us, ignore...
-                logger.debug("[{}] ignoring tasks - index meta data doesn't exist", index);
+                logger.debug("[{}] ignoring tasks - index meta data doesn't exist", entry.getKey());
                 continue;
             }
+            final Index index = indexMetaData.getIndex();
             // the tasks lists to iterate over, filled with the list of mapping tasks, trying to keep
             // the latest (based on order) update mapping one per node
             List<RefreshTask> allIndexTasks = entry.getValue();
@@ -127,7 +128,7 @@ public class MetaDataMappingService extends AbstractComponent {
                 if (indexMetaData.isSameUUID(task.indexUUID)) {
                     hasTaskWithRightUUID = true;
                 } else {
-                    logger.debug("[{}] ignoring task [{}] - index meta data doesn't match task uuid", index, task);
+                    logger.debug("{} ignoring task [{}] - index meta data doesn't match task uuid", index, task);
                 }
             }
             if (hasTaskWithRightUUID == false) {
@@ -136,7 +137,7 @@ public class MetaDataMappingService extends AbstractComponent {
 
             // construct the actual index if needed, and make sure the relevant mappings are there
             boolean removeIndex = false;
-            IndexService indexService = indicesService.indexService(index);
+            IndexService indexService = indicesService.indexService(indexMetaData.getIndex());
             if (indexService == null) {
                 // we need to create the index here, and add the current mapping to it, so we can merge
                 indexService = indicesService.createIndex(nodeServicesProvider, indexMetaData, Collections.emptyList());
@@ -208,47 +209,57 @@ public class MetaDataMappingService extends AbstractComponent {
 
     class PutMappingExecutor implements ClusterStateTaskExecutor<PutMappingClusterStateUpdateRequest> {
         @Override
-        public BatchResult<PutMappingClusterStateUpdateRequest> execute(ClusterState currentState, List<PutMappingClusterStateUpdateRequest> tasks) throws Exception {
-            Set<String> indicesToClose = new HashSet<>();
+        public BatchResult<PutMappingClusterStateUpdateRequest> execute(ClusterState currentState,
+                                                                        List<PutMappingClusterStateUpdateRequest> tasks) throws Exception {
+            Set<Index> indicesToClose = new HashSet<>();
             BatchResult.Builder<PutMappingClusterStateUpdateRequest> builder = BatchResult.builder();
             try {
                 // precreate incoming indices;
                 for (PutMappingClusterStateUpdateRequest request : tasks) {
-                    // failures here mean something is broken with our cluster state - fail all tasks by letting exceptions bubble up
+                    final List<Index> indices = new ArrayList<>(request.indices().length);
+                    try {
                         for (String index : request.indices()) {
                             final IndexMetaData indexMetaData = currentState.metaData().index(index);
-                        if (indexMetaData != null  && indicesService.hasIndex(index) == false) {
-                            // if we don't have the index, we will throw exceptions later;
-                            indicesToClose.add(index);
-                            IndexService indexService = indicesService.createIndex(nodeServicesProvider, indexMetaData, Collections.emptyList());
+                            if (indexMetaData != null) {
+                                if (indicesService.hasIndex(indexMetaData.getIndex()) == false) {
+                                    // if the index does not exists we create it once, add all types to the mapper service and
+                                    // close it later once we are done with mapping update
+                                    indicesToClose.add(indexMetaData.getIndex());
+                                    IndexService indexService = indicesService.createIndex(nodeServicesProvider, indexMetaData,
+                                        Collections.emptyList());
                                     // add mappings for all types, we need them for cross-type validation
                                     for (ObjectCursor<MappingMetaData> mapping : indexMetaData.getMappings().values()) {
-                                indexService.mapperService().merge(mapping.value.type(), mapping.value.source(), MapperService.MergeReason.MAPPING_RECOVERY, request.updateAllTypes());
+                                        indexService.mapperService().merge(mapping.value.type(), mapping.value.source(),
+                                            MapperService.MergeReason.MAPPING_RECOVERY, request.updateAllTypes());
                                     }
                                 }
+                                indices.add(indexMetaData.getIndex());
+                            } else {
+                                // we didn't find the index in the clusterstate - maybe it was deleted
+                                // NOTE: this doesn't fail the entire batch only the current PutMapping request we are processing
+                                throw new IndexNotFoundException(index);
                             }
                         }
-                for (PutMappingClusterStateUpdateRequest request : tasks) {
-                    try {
-                        currentState = applyRequest(currentState, request);
+                        currentState = applyRequest(currentState, request, indices);
                         builder.success(request);
                     } catch (Throwable t) {
                         builder.failure(request, t);
                     }
                 }
-
                 return builder.build(currentState);
             } finally {
-                for (String index : indicesToClose) {
+                for (Index index : indicesToClose) {
                     indicesService.removeIndex(index, "created for mapping processing");
                 }
             }
         }
 
-        private ClusterState applyRequest(ClusterState currentState, PutMappingClusterStateUpdateRequest request) throws IOException {
+        private ClusterState applyRequest(ClusterState currentState, PutMappingClusterStateUpdateRequest request,
+                                          List<Index> indices) throws IOException {
             String mappingType = request.type();
             CompressedXContent mappingUpdateSource = new CompressedXContent(request.source());
-            for (String index : request.indices()) {
+            final MetaData metaData = currentState.metaData();
+            for (Index index : indices) {
                 IndexService indexService = indicesService.indexServiceSafe(index);
                 // try and parse it (no need to add it here) so we can bail early in case of parsing exception
                 DocumentMapper newMapper;
@@ -270,7 +281,7 @@ public class MetaDataMappingService extends AbstractComponent {
                         // and a put mapping api call, so we don't which type did exist before.
                         // Also the order of the mappings may be backwards.
                         if (newMapper.parentFieldMapper().active()) {
-                            IndexMetaData indexMetaData = currentState.metaData().index(index);
+                            IndexMetaData indexMetaData = metaData.index(index);
                             for (ObjectCursor<MappingMetaData> mapping : indexMetaData.getMappings().values()) {
                                 if (newMapper.parentFieldMapper().type().equals(mapping.value.type())) {
                                     throw new IllegalArgumentException("can't add a _parent field that points to an already existing type");
@@ -290,11 +301,11 @@ public class MetaDataMappingService extends AbstractComponent {
             if (!MapperService.DEFAULT_MAPPING.equals(mappingType) && !PercolatorService.TYPE_NAME.equals(mappingType) && mappingType.charAt(0) == '_') {
                 throw new InvalidTypeNameException("Document mapping type name can't start with '_'");
             }
-            MetaData.Builder builder = MetaData.builder(currentState.metaData());
-            for (String index : request.indices()) {
+            MetaData.Builder builder = MetaData.builder(metaData);
+            for (Index index : indices) {
                 // do the actual merge here on the master, and update the mapping source
                 IndexService indexService = indicesService.indexService(index);
-                if (indexService == null) {
+                if (indexService == null) { // TODO this seems impossible given we use indexServiceSafe above
                     continue;
                 }
 
@@ -326,7 +337,7 @@ public class MetaDataMappingService extends AbstractComponent {
                     }
                 }
 
-                IndexMetaData indexMetaData = currentState.metaData().index(index);
+                IndexMetaData indexMetaData = metaData.index(index);
                 if (indexMetaData == null) {
                     throw new IndexNotFoundException(index);
                 }

core/src/main/java/org/elasticsearch/common/lucene/Lucene.java

@@ -235,12 +235,8 @@ public class Lucene {
             @Override
             protected Object doBody(String segmentFileName) throws IOException {
                 try (IndexInput input = directory.openInput(segmentFileName, IOContext.READ)) {
-                    final int format = input.readInt();
-                    if (format == CodecUtil.CODEC_MAGIC) {
                     CodecUtil.checksumEntireFile(input);
                 }
-                    // legacy....
-                }
                 return null;
             }
         }.run();

core/src/main/java/org/elasticsearch/common/settings/IndexScopedSettings.java

@@ -35,6 +35,7 @@ import org.elasticsearch.index.fielddata.IndexFieldDataService;
 import org.elasticsearch.index.mapper.FieldMapper;
 import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.index.percolator.PercolatorQueriesRegistry;
+import org.elasticsearch.index.similarity.SimilarityService;
 import org.elasticsearch.index.store.FsDirectoryService;
 import org.elasticsearch.index.store.IndexStore;
 import org.elasticsearch.index.store.Store;
@@ -44,6 +45,7 @@ import org.elasticsearch.indices.IndicesRequestCache;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashSet;
+import java.util.Map;
 import java.util.Set;
 import java.util.function.Predicate;
 
@@ -133,8 +135,15 @@ public final class IndexScopedSettings extends AbstractScopedSettings {
         FsDirectoryService.INDEX_LOCK_FACTOR_SETTING,
         EngineConfig.INDEX_CODEC_SETTING,
         IndexWarmer.INDEX_NORMS_LOADING_SETTING,
-        // this sucks but we can't really validate all the analyzers/similarity in here
-        Setting.groupSetting("index.similarity.", false, Setting.Scope.INDEX), // this allows similarity settings to be passed
+        // validate that built-in similarities don't get redefined
+        Setting.groupSetting("index.similarity.", false, Setting.Scope.INDEX, (s) -> {
+            Map<String, Settings> groups = s.getAsGroups();
+            for (String key : SimilarityService.BUILT_IN.keySet()) {
+                if (groups.containsKey(key)) {
+                    throw new IllegalArgumentException("illegal value for [index.similarity."+ key + "] cannot redefine built-in similarity");
+                }
+            }
+        }), // this allows similarity settings to be passed
         Setting.groupSetting("index.analysis.", false, Setting.Scope.INDEX) // this allows analysis settings to be passed
 
     )));

core/src/main/java/org/elasticsearch/common/settings/Setting.java

@@ -20,6 +20,7 @@ package org.elasticsearch.common.settings;
 
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.ElasticsearchParseException;
+import org.elasticsearch.ExceptionsHelper;
 import org.elasticsearch.action.support.ToXContentToBytes;
 import org.elasticsearch.common.Booleans;
 import org.elasticsearch.common.Strings;
@@ -30,16 +31,19 @@ import org.elasticsearch.common.unit.ByteSizeValue;
 import org.elasticsearch.common.unit.MemorySizeValue;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.common.xcontent.XContentType;
 
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 import java.util.function.BiConsumer;
 import java.util.function.Consumer;
 import java.util.function.Function;
+import java.util.function.Predicate;
 import java.util.regex.Pattern;
 import java.util.stream.Collectors;
 
@@ -177,7 +181,7 @@ public class Setting<T> extends ToXContentToBytes {
     /**
      * Returns <code>true</code> iff this setting is present in the given settings object. Otherwise <code>false</code>
      */
-    public final boolean exists(Settings settings) {
+    public boolean exists(Settings settings) {
         return settings.get(getKey()) != null;
     }
 
@@ -505,17 +509,45 @@ public class Setting<T> extends ToXContentToBytes {
             throw new ElasticsearchException(ex);
         }
     }
-
     public static Setting<Settings> groupSetting(String key, boolean dynamic, Scope scope) {
+        return groupSetting(key, dynamic, scope, (s) -> {});
+    }
+    public static Setting<Settings> groupSetting(String key, boolean dynamic, Scope scope, Consumer<Settings> validator) {
         return new Setting<Settings>(new GroupKey(key), (s) -> "", (s) -> null, dynamic, scope) {
             @Override
             public boolean isGroupSetting() {
                 return true;
             }
 
+            @Override
+            public String getRaw(Settings settings) {
+                Settings subSettings = get(settings);
+                try {
+                    XContentBuilder builder = XContentFactory.jsonBuilder();
+                    builder.startObject();
+                    subSettings.toXContent(builder, EMPTY_PARAMS);
+                    builder.endObject();
+                    return builder.string();
+                } catch (IOException e) {
+                    throw new RuntimeException(e);
+                }
+            }
+
             @Override
             public Settings get(Settings settings) {
-                return settings.getByPrefix(getKey());
+                Settings byPrefix = settings.getByPrefix(getKey());
+                validator.accept(byPrefix);
+                return byPrefix;
+            }
+
+            @Override
+            public boolean exists(Settings settings) {
+                for (Map.Entry<String, String> entry : settings.getAsMap().entrySet()) {
+                    if (entry.getKey().startsWith(key)) {
+                        return true;
+                    }
+                }
+                return false;
             }
 
             @Override

core/src/main/java/org/elasticsearch/discovery/Discovery.java

@@ -26,7 +26,6 @@ import org.elasticsearch.cluster.routing.RoutingService;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.component.LifecycleComponent;
 import org.elasticsearch.common.io.stream.StreamInput;
-import org.elasticsearch.node.service.NodeService;
 
 import java.io.IOException;
 
@@ -41,11 +40,6 @@ public interface Discovery extends LifecycleComponent<Discovery> {
 
     String nodeDescription();
 
-    /**
-     * Here as a hack to solve dep injection problem...
-     */
-    void setNodeService(@Nullable NodeService nodeService);
-
     /**
      * Another hack to solve dep injection problem..., note, this will be called before
      * any start is called.

core/src/main/java/org/elasticsearch/discovery/local/LocalDiscovery.java

@@ -33,7 +33,6 @@ import org.elasticsearch.cluster.routing.RoutingService;
 import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
 import org.elasticsearch.common.component.AbstractLifecycleComponent;
 import org.elasticsearch.common.inject.Inject;
-import org.elasticsearch.common.inject.internal.Nullable;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.settings.ClusterSettings;
@@ -45,7 +44,6 @@ import org.elasticsearch.discovery.BlockingClusterStatePublishResponseHandler;
 import org.elasticsearch.discovery.Discovery;
 import org.elasticsearch.discovery.DiscoverySettings;
 import org.elasticsearch.discovery.DiscoveryStats;
-import org.elasticsearch.node.service.NodeService;
 
 import java.util.HashSet;
 import java.util.Queue;
@@ -84,11 +82,6 @@ public class LocalDiscovery extends AbstractLifecycleComponent<Discovery> implem
         this.discoverySettings = new DiscoverySettings(settings, clusterSettings);
     }
 
-    @Override
-    public void setNodeService(@Nullable NodeService nodeService) {
-        // nothing to do here
-    }
-
     @Override
     public void setRoutingService(RoutingService routingService) {
         this.routingService = routingService;

core/src/main/java/org/elasticsearch/discovery/zen/DiscoveryNodesProvider.java

@@ -20,8 +20,6 @@
 package org.elasticsearch.discovery.zen;
 
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.common.Nullable;
-import org.elasticsearch.node.service.NodeService;
 
 /**
  *
@@ -30,6 +28,4 @@ public interface DiscoveryNodesProvider {
 
     DiscoveryNodes nodes();
 
-    @Nullable
-    NodeService nodeService();
 }

core/src/main/java/org/elasticsearch/discovery/zen/ZenDiscovery.java

@@ -60,7 +60,6 @@ import org.elasticsearch.discovery.zen.ping.ZenPing;
 import org.elasticsearch.discovery.zen.ping.ZenPingService;
 import org.elasticsearch.discovery.zen.publish.PendingClusterStateStats;
 import org.elasticsearch.discovery.zen.publish.PublishClusterStateAction;
-import org.elasticsearch.node.service.NodeService;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.EmptyTransportResponseHandler;
 import org.elasticsearch.transport.TransportChannel;
@@ -137,10 +136,6 @@ public class ZenDiscovery extends AbstractLifecycleComponent<Discovery> implemen
     /** counts the time this node has joined the cluster or have elected it self as master */
     private final AtomicLong clusterJoinsCounter = new AtomicLong();
 
-    @Nullable
-    private NodeService nodeService;
-
-
     // must initialized in doStart(), when we have the routingService set
     private volatile NodeJoinController nodeJoinController;
 
@@ -192,11 +187,6 @@ public class ZenDiscovery extends AbstractLifecycleComponent<Discovery> implemen
         transportService.registerRequestHandler(DISCOVERY_REJOIN_ACTION_NAME, RejoinClusterRequest::new, ThreadPool.Names.SAME, new RejoinClusterRequestHandler());
     }
 
-    @Override
-    public void setNodeService(@Nullable NodeService nodeService) {
-        this.nodeService = nodeService;
-    }
-
     @Override
     public void setRoutingService(RoutingService routingService) {
         this.routingService = routingService;
@@ -292,11 +282,6 @@ public class ZenDiscovery extends AbstractLifecycleComponent<Discovery> implemen
         return clusterService.state().nodes();
     }
 
-    @Override
-    public NodeService nodeService() {
-        return this.nodeService;
-    }
-
     @Override
     public boolean nodeHasJoinedClusterOnce() {
         return clusterJoinsCounter.get() > 0;

core/src/main/java/org/elasticsearch/gateway/ReplicaShardAllocator.java

@@ -104,6 +104,8 @@ public abstract class ReplicaShardAllocator extends AbstractComponent {
                             && matchingNodes.isNodeMatchBySyncID(nodeWithHighestMatch) == true) {
                         // we found a better match that has a full sync id match, the existing allocation is not fully synced
                         // so we found a better one, cancel this one
+                        logger.debug("cancelling allocation of replica on [{}], sync id match found on node [{}]",
+                                currentNode, nodeWithHighestMatch);
                         it.moveToUnassigned(new UnassignedInfo(UnassignedInfo.Reason.REALLOCATED_REPLICA,
                                 "existing allocation of replica to [" + currentNode + "] cancelled, sync id match found on node [" + nodeWithHighestMatch + "]",
                                 null, allocation.getCurrentNanoTime(), System.currentTimeMillis()));

core/src/main/java/org/elasticsearch/index/Index.java

@@ -19,6 +19,7 @@
 
 package org.elasticsearch.index;
 
+import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.Writeable;
@@ -50,8 +51,15 @@ public class Index implements Writeable<Index> {
 
     @Override
     public String toString() {
+        /*
+         * If we have a uuid we put it in the toString so it'll show up in logs which is useful as more and more things use the uuid rather
+         * than the name as the lookup key for the index.
+         */
+        if (ClusterState.UNKNOWN_UUID.equals(uuid)) {
             return "[" + name + "]";
         }
+        return "[" + name + "/" + uuid + "]";
+    }
 
     @Override
     public boolean equals(Object o) {

core/src/main/java/org/elasticsearch/index/IndexingSlowLog.java

@@ -36,6 +36,7 @@ import java.util.concurrent.TimeUnit;
 /**
  */
 public final class IndexingSlowLog implements IndexingOperationListener {
+    private final Index index;
     private boolean reformat;
     private long indexWarnThreshold;
     private long indexInfoThreshold;
@@ -51,7 +52,6 @@ public final class IndexingSlowLog implements IndexingOperationListener {
     private SlowLogLevel level;
 
     private final ESLogger indexLogger;
-    private final ESLogger deleteLogger;
 
     private static final String INDEX_INDEXING_SLOWLOG_PREFIX = "index.indexing.slowlog";
     public static final Setting<TimeValue> INDEX_INDEXING_SLOWLOG_THRESHOLD_INDEX_WARN_SETTING = Setting.timeSetting(INDEX_INDEXING_SLOWLOG_PREFIX +".threshold.index.warn", TimeValue.timeValueNanos(-1), TimeValue.timeValueMillis(-1), true, Setting.Scope.INDEX);
@@ -75,16 +75,8 @@ public final class IndexingSlowLog implements IndexingOperationListener {
     }, true, Setting.Scope.INDEX);
 
     IndexingSlowLog(IndexSettings indexSettings) {
-        this(indexSettings, Loggers.getLogger(INDEX_INDEXING_SLOWLOG_PREFIX + ".index"),
-                Loggers.getLogger(INDEX_INDEXING_SLOWLOG_PREFIX + ".delete"));
-    }
-
-    /**
-     * Build with the specified loggers. Only used to testing.
-     */
-    IndexingSlowLog(IndexSettings indexSettings, ESLogger indexLogger, ESLogger deleteLogger) {
-        this.indexLogger = indexLogger;
-        this.deleteLogger = deleteLogger;
+        this.indexLogger = Loggers.getLogger(INDEX_INDEXING_SLOWLOG_PREFIX + ".index", indexSettings.getSettings());
+        this.index = indexSettings.getIndex();
 
         indexSettings.getScopedSettings().addSettingsUpdateConsumer(INDEX_INDEXING_SLOWLOG_REFORMAT_SETTING, this::setReformat);
         this.reformat = indexSettings.getValue(INDEX_INDEXING_SLOWLOG_REFORMAT_SETTING);
@@ -109,7 +101,6 @@ public final class IndexingSlowLog implements IndexingOperationListener {
     private void setLevel(SlowLogLevel level) {
         this.level = level;
         this.indexLogger.setLevel(level.name());
-        this.deleteLogger.setLevel(level.name());
     }
 
     private void setWarnThreshold(TimeValue warnThreshold) {
@@ -141,13 +132,13 @@ public final class IndexingSlowLog implements IndexingOperationListener {
 
     private void postIndexing(ParsedDocument doc, long tookInNanos) {
         if (indexWarnThreshold >= 0 && tookInNanos > indexWarnThreshold) {
-            indexLogger.warn("{}", new SlowLogParsedDocumentPrinter(doc, tookInNanos, reformat, maxSourceCharsToLog));
+            indexLogger.warn("{}", new SlowLogParsedDocumentPrinter(index, doc, tookInNanos, reformat, maxSourceCharsToLog));
         } else if (indexInfoThreshold >= 0 && tookInNanos > indexInfoThreshold) {
-            indexLogger.info("{}", new SlowLogParsedDocumentPrinter(doc, tookInNanos, reformat, maxSourceCharsToLog));
+            indexLogger.info("{}", new SlowLogParsedDocumentPrinter(index, doc, tookInNanos, reformat, maxSourceCharsToLog));
         } else if (indexDebugThreshold >= 0 && tookInNanos > indexDebugThreshold) {
-            indexLogger.debug("{}", new SlowLogParsedDocumentPrinter(doc, tookInNanos, reformat, maxSourceCharsToLog));
+            indexLogger.debug("{}", new SlowLogParsedDocumentPrinter(index, doc, tookInNanos, reformat, maxSourceCharsToLog));
         } else if (indexTraceThreshold >= 0 && tookInNanos > indexTraceThreshold) {
-            indexLogger.trace("{}", new SlowLogParsedDocumentPrinter(doc, tookInNanos, reformat, maxSourceCharsToLog));
+            indexLogger.trace("{}", new SlowLogParsedDocumentPrinter(index, doc, tookInNanos, reformat, maxSourceCharsToLog));
         }
     }
 
@@ -156,9 +147,11 @@ public final class IndexingSlowLog implements IndexingOperationListener {
         private final long tookInNanos;
         private final boolean reformat;
         private final int maxSourceCharsToLog;
+        private final Index index;
 
-        SlowLogParsedDocumentPrinter(ParsedDocument doc, long tookInNanos, boolean reformat, int maxSourceCharsToLog) {
+        SlowLogParsedDocumentPrinter(Index index, ParsedDocument doc, long tookInNanos, boolean reformat, int maxSourceCharsToLog) {
             this.doc = doc;
+            this.index = index;
             this.tookInNanos = tookInNanos;
             this.reformat = reformat;
             this.maxSourceCharsToLog = maxSourceCharsToLog;
@@ -167,6 +160,7 @@ public final class IndexingSlowLog implements IndexingOperationListener {
         @Override
         public String toString() {
             StringBuilder sb = new StringBuilder();
+            sb.append(index).append(" ");
             sb.append("took[").append(TimeValue.timeValueNanos(tookInNanos)).append("], took_millis[").append(TimeUnit.NANOSECONDS.toMillis(tookInNanos)).append("], ");
             sb.append("type[").append(doc.type()).append("], ");
             sb.append("id[").append(doc.id()).append("], ");

core/src/main/java/org/elasticsearch/index/fielddata/IndexFieldData.java

@@ -20,10 +20,14 @@
 package org.elasticsearch.index.fielddata;
 
 import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.index.IndexReaderContext;
 import org.apache.lucene.index.LeafReaderContext;
+import org.apache.lucene.index.ReaderUtil;
 import org.apache.lucene.search.DocIdSet;
 import org.apache.lucene.search.DocIdSetIterator;
 import org.apache.lucene.search.FieldComparatorSource;
+import org.apache.lucene.search.IndexSearcher;
+import org.apache.lucene.search.Query;
 import org.apache.lucene.search.Scorer;
 import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.Weight;
@@ -122,11 +126,11 @@ public interface IndexFieldData<FD extends AtomicFieldData> extends IndexCompone
         public static class Nested {
 
             private final BitSetProducer rootFilter;
-            private final Weight innerFilter;
+            private final Query innerQuery;
 
-            public Nested(BitSetProducer rootFilter, Weight innerFilter) {
+            public Nested(BitSetProducer rootFilter, Query innerQuery) {
                 this.rootFilter = rootFilter;
-                this.innerFilter = innerFilter;
+                this.innerQuery = innerQuery;
             }
 
             /**
@@ -140,7 +144,10 @@ public interface IndexFieldData<FD extends AtomicFieldData> extends IndexCompone
              * Get a {@link DocIdSet} that matches the inner documents.
              */
             public DocIdSetIterator innerDocs(LeafReaderContext ctx) throws IOException {
-                Scorer s = innerFilter.scorer(ctx);
+                final IndexReaderContext topLevelCtx = ReaderUtil.getTopLevelContext(ctx);
+                IndexSearcher indexSearcher = new IndexSearcher(topLevelCtx);
+                Weight weight = indexSearcher.createNormalizedWeight(innerQuery, false);
+                Scorer s = weight.scorer(ctx);
                 return s == null ? null : s.iterator();
             }
         }

core/src/main/java/org/elasticsearch/index/mapper/geo/BaseGeoPointFieldMapper.java

@@ -28,6 +28,8 @@ import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.collect.Iterators;
 import org.elasticsearch.common.geo.GeoPoint;
 import org.elasticsearch.common.geo.GeoUtils;
+import org.elasticsearch.common.logging.DeprecationLogger;
+import org.elasticsearch.common.logging.Loggers;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentParser;
@@ -56,13 +58,13 @@ import static org.elasticsearch.index.mapper.core.TypeParsers.parseMultiField;
  */
 public abstract class BaseGeoPointFieldMapper extends FieldMapper implements ArrayValueMapperParser {
     public static final String CONTENT_TYPE = "geo_point";
+    protected static final DeprecationLogger deprecationLogger = new DeprecationLogger(Loggers.getLogger(BaseGeoPointFieldMapper.class));
     public static class Names {
         public static final String LAT = "lat";
         public static final String LAT_SUFFIX = "." + LAT;
         public static final String LON = "lon";
         public static final String LON_SUFFIX = "." + LON;
         public static final String GEOHASH = "geohash";
-        public static final String GEOHASH_SUFFIX = "." + GEOHASH;
         public static final String IGNORE_MALFORMED = "ignore_malformed";
     }
 
@@ -194,9 +196,13 @@ public abstract class BaseGeoPointFieldMapper extends FieldMapper implements Arr
                 String propName = Strings.toUnderscoreCase(entry.getKey());
                 Object propNode = entry.getValue();
                 if (propName.equals("lat_lon")) {
+                    deprecationLogger.deprecated(CONTENT_TYPE + " lat_lon parameter is deprecated and will be removed "
+                        + "in the next major release");
                     builder.enableLatLon(XContentMapValues.lenientNodeBooleanValue(propNode));
                     iterator.remove();
                 } else if (propName.equals("precision_step")) {
+                    deprecationLogger.deprecated(CONTENT_TYPE + " precision_step parameter is deprecated and will be removed "
+                        + "in the next major release");
                     builder.precisionStep(XContentMapValues.nodeIntegerValue(propNode));
                     iterator.remove();
                 } else if (propName.equals("geohash")) {

core/src/main/java/org/elasticsearch/index/query/GeoBoundingBoxQueryBuilder.java

@@ -250,7 +250,8 @@ public class GeoBoundingBoxQueryBuilder extends AbstractQueryBuilder<GeoBounding
 
         GeoPoint luceneTopLeft = new GeoPoint(topLeft);
         GeoPoint luceneBottomRight = new GeoPoint(bottomRight);
-        if (GeoValidationMethod.isCoerce(validationMethod)) {
+        final Version indexVersionCreated = context.indexVersionCreated();
+        if (indexVersionCreated.onOrAfter(Version.V_2_2_0) || GeoValidationMethod.isCoerce(validationMethod)) {
             // Special case: if the difference between the left and right is 360 and the right is greater than the left, we are asking for
             // the complete longitude range so need to set longitude to the complete longitude range
             double right = luceneBottomRight.getLon();
@@ -265,7 +266,6 @@ public class GeoBoundingBoxQueryBuilder extends AbstractQueryBuilder<GeoBounding
             }
         }
 
-        final Version indexVersionCreated = context.indexVersionCreated();
         if (indexVersionCreated.onOrAfter(Version.V_2_2_0)) {
             // if index created V_2_2 use (soon to be legacy) numeric encoding postings format
             // if index created V_2_3 > use prefix encoded postings format

core/src/main/java/org/elasticsearch/index/query/GeoDistanceQueryBuilder.java

@@ -219,18 +219,18 @@ public class GeoDistanceQueryBuilder extends AbstractQueryBuilder<GeoDistanceQue
             throw new QueryShardException(shardContext, "field [" + fieldName + "] is not a geo_point field");
         }
 
+        final Version indexVersionCreated = shardContext.indexVersionCreated();
         QueryValidationException exception = checkLatLon(shardContext.indexVersionCreated().before(Version.V_2_0_0));
         if (exception != null) {
             throw new QueryShardException(shardContext, "couldn't validate latitude/ longitude values", exception);
         }
 
-        if (GeoValidationMethod.isCoerce(validationMethod)) {
+        if (indexVersionCreated.onOrAfter(Version.V_2_2_0) || GeoValidationMethod.isCoerce(validationMethod)) {
             GeoUtils.normalizePoint(center, true, true);
         }
 
         double normDistance = geoDistance.normalize(this.distance, DistanceUnit.DEFAULT);
 
-        final Version indexVersionCreated = shardContext.indexVersionCreated();
         if (indexVersionCreated.before(Version.V_2_2_0)) {
             GeoPointFieldMapperLegacy.GeoPointFieldType geoFieldType = ((GeoPointFieldMapperLegacy.GeoPointFieldType) fieldType);
             IndexGeoPointFieldData indexFieldData = shardContext.getForField(fieldType);

core/src/main/java/org/elasticsearch/index/query/GeoDistanceQueryParser.java

@@ -120,9 +120,6 @@ public class GeoDistanceQueryParser implements QueryParser<GeoDistanceQueryBuild
                 } else if (currentFieldName.endsWith(GeoPointFieldMapper.Names.LON_SUFFIX)) {
                     point.resetLon(parser.doubleValue());
                     fieldName = currentFieldName.substring(0, currentFieldName.length() - GeoPointFieldMapper.Names.LON_SUFFIX.length());
-                } else if (currentFieldName.endsWith(GeoPointFieldMapper.Names.GEOHASH_SUFFIX)) {
-                    point.resetFromGeoHash(parser.text());
-                    fieldName = currentFieldName.substring(0, currentFieldName.length() - GeoPointFieldMapper.Names.GEOHASH_SUFFIX.length());
                 } else if (parseContext.parseFieldMatcher().match(currentFieldName, AbstractQueryBuilder.NAME_FIELD)) {
                     queryName = parser.text();
                 } else if (parseContext.parseFieldMatcher().match(currentFieldName, AbstractQueryBuilder.BOOST_FIELD)) {

core/src/main/java/org/elasticsearch/index/query/GeoDistanceRangeQueryBuilder.java

@@ -236,7 +236,7 @@ public class GeoDistanceRangeQueryBuilder extends AbstractQueryBuilder<GeoDistan
         }
 
         GeoPoint point = new GeoPoint(this.point);
-        if (GeoValidationMethod.isCoerce(validationMethod)) {
+        if (indexCreatedBeforeV2_2 == false || GeoValidationMethod.isCoerce(validationMethod)) {
             GeoUtils.normalizePoint(point, true, true);
         }
 

core/src/main/java/org/elasticsearch/index/query/GeoDistanceRangeQueryParser.java

@@ -196,15 +196,6 @@ public class GeoDistanceRangeQueryParser implements QueryParser<GeoDistanceRange
                         point = new GeoPoint();
                     }
                     point.resetLon(parser.doubleValue());
-                } else if (currentFieldName.endsWith(GeoPointFieldMapper.Names.GEOHASH_SUFFIX)) {
-                    String maybeFieldName = currentFieldName.substring(0, currentFieldName.length() - GeoPointFieldMapper.Names.GEOHASH_SUFFIX.length());
-                    if (fieldName == null || fieldName.equals(maybeFieldName)) {
-                        fieldName = maybeFieldName;
-                    } else {
-                        throw new ParsingException(parser.getTokenLocation(), "[" + GeoDistanceRangeQueryBuilder.NAME +
-                                "] field name already set to [" + fieldName + "] but found [" + currentFieldName + "]");
-                    }
-                    point = GeoPoint.fromGeohash(parser.text());
                 } else if (parseContext.parseFieldMatcher().match(currentFieldName, NAME_FIELD)) {
                     queryName = parser.text();
                 } else if (parseContext.parseFieldMatcher().match(currentFieldName, BOOST_FIELD)) {

core/src/main/java/org/elasticsearch/index/query/GeoPolygonQueryBuilder.java

@@ -131,13 +131,13 @@ public class GeoPolygonQueryBuilder extends AbstractQueryBuilder<GeoPolygonQuery
             }
         }
 
-        if (GeoValidationMethod.isCoerce(validationMethod)) {
+        final Version indexVersionCreated = context.indexVersionCreated();
+        if (indexVersionCreated.onOrAfter(Version.V_2_2_0) || GeoValidationMethod.isCoerce(validationMethod)) {
             for (GeoPoint point : shell) {
                 GeoUtils.normalizePoint(point, true, true);
             }
         }
 
-        final Version indexVersionCreated = context.indexVersionCreated();
         if (indexVersionCreated.before(Version.V_2_2_0)) {
             IndexGeoPointFieldData indexFieldData = context.getForField(fieldType);
             return new GeoPolygonQuery(indexFieldData, shell.toArray(new GeoPoint[shellSize]));

core/src/main/java/org/elasticsearch/index/query/support/NestedInnerQueryParseSupport.java

@@ -31,7 +31,6 @@ import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.index.query.QueryParseContext;
 import org.elasticsearch.index.query.QueryShardContext;
 import org.elasticsearch.index.query.QueryShardException;
-import org.elasticsearch.search.internal.SearchContext;
 
 import java.io.IOException;
 
@@ -61,8 +60,8 @@ public class NestedInnerQueryParseSupport {
     protected ObjectMapper nestedObjectMapper;
     private ObjectMapper parentObjectMapper;
 
-    public NestedInnerQueryParseSupport(XContentParser parser, SearchContext searchContext) {
-        shardContext = searchContext.getQueryShardContext();
+    public NestedInnerQueryParseSupport(XContentParser parser, QueryShardContext context) {
+        shardContext = context;
         parseContext = shardContext.parseContext();
         shardContext.reset(parser);
 

core/src/main/java/org/elasticsearch/index/similarity/SimilarityService.java

@@ -21,6 +21,7 @@ package org.elasticsearch.index.similarity;
 
 import org.apache.lucene.search.similarities.PerFieldSimilarityWrapper;
 import org.apache.lucene.search.similarities.Similarity;
+import org.elasticsearch.Version;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.index.AbstractIndexComponent;
 import org.elasticsearch.index.IndexModule;
@@ -63,6 +64,10 @@ public final class SimilarityService extends AbstractIndexComponent {
         Map<String, Settings> similaritySettings = this.indexSettings.getSettings().getGroups(IndexModule.SIMILARITY_SETTINGS_PREFIX);
         for (Map.Entry<String, Settings> entry : similaritySettings.entrySet()) {
             String name = entry.getKey();
+            // Starting with v5.0 indices, it should no longer be possible to redefine built-in similarities
+            if(BUILT_IN.containsKey(name) && indexSettings.getIndexVersionCreated().onOrAfter(Version.V_5_0_0)) {
+                throw new IllegalArgumentException("Cannot redefine built-in Similarity [" + name + "]");
+            }
             Settings settings = entry.getValue();
             String typeName = settings.get("type");
             if (typeName == null) {
@@ -76,9 +81,16 @@ public final class SimilarityService extends AbstractIndexComponent {
             }
             providers.put(name, factory.apply(name, settings));
         }
-        addSimilarities(similaritySettings, providers, DEFAULTS);
+        for (Map.Entry<String, SimilarityProvider> entry : addSimilarities(similaritySettings, DEFAULTS).entrySet()) {
+            // Avoid overwriting custom providers for indices older that v5.0
+            if (providers.containsKey(entry.getKey()) && indexSettings.getIndexVersionCreated().before(Version.V_5_0_0)) {
+                continue;
+            }
+            providers.put(entry.getKey(), entry.getValue());
+        }
         this.similarities = providers;
-        defaultSimilarity = providers.get(SimilarityService.DEFAULT_SIMILARITY).get();
+        defaultSimilarity = (providers.get("default") != null) ? providers.get("default").get()
+                                                              : providers.get(SimilarityService.DEFAULT_SIMILARITY).get();
         // Expert users can configure the base type as being different to default, but out-of-box we use default.
         baseSimilarity = (providers.get("base") != null) ? providers.get("base").get() :
                 defaultSimilarity;
@@ -90,7 +102,9 @@ public final class SimilarityService extends AbstractIndexComponent {
                 defaultSimilarity;
     }
 
-    private void addSimilarities(Map<String, Settings>  similaritySettings, Map<String, SimilarityProvider> providers, Map<String, BiFunction<String, Settings, SimilarityProvider>> similarities)  {
+    private Map<String, SimilarityProvider> addSimilarities(Map<String, Settings>  similaritySettings,
+                                 Map<String, BiFunction<String, Settings, SimilarityProvider>> similarities)  {
+        Map<String, SimilarityProvider> providers = new HashMap<>(similarities.size());
         for (Map.Entry<String, BiFunction<String, Settings, SimilarityProvider>> entry : similarities.entrySet()) {
             String name = entry.getKey();
             BiFunction<String, Settings, SimilarityProvider> factory = entry.getValue();
@@ -100,12 +114,17 @@ public final class SimilarityService extends AbstractIndexComponent {
             }
             providers.put(name, factory.apply(name, settings));
         }
+        return providers;
     }
 
     public SimilarityProvider getSimilarity(String name) {
         return similarities.get(name);
     }
 
+    public SimilarityProvider getDefaultSimilarity() {
+        return similarities.get("default");
+    }
+
     static class PerFieldSimilarity extends PerFieldSimilarityWrapper {
 
         private final Similarity defaultSimilarity;

core/src/main/java/org/elasticsearch/indices/IndicesService.java

@@ -103,6 +103,7 @@ import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Predicate;
+import java.util.stream.Collectors;
 
 import static java.util.Collections.emptyMap;
 import static java.util.Collections.unmodifiableMap;
@@ -185,14 +186,14 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
         ExecutorService indicesStopExecutor = Executors.newFixedThreadPool(5, EsExecutors.daemonThreadFactory("indices_shutdown"));
 
         // Copy indices because we modify it asynchronously in the body of the loop
-        Set<String> indices = new HashSet<>(this.indices.keySet());
+        final Set<Index> indices = this.indices.values().stream().map(s -> s.index()).collect(Collectors.toSet());
         final CountDownLatch latch = new CountDownLatch(indices.size());
-        for (final String index : indices) {
+        for (final Index index : indices) {
             indicesStopExecutor.execute(() -> {
                 try {
                     removeIndex(index, "shutdown", false);
                 } catch (Throwable e) {
-                    logger.warn("failed to remove index on stop [" + index + "]", e);
+                    logger.warn("failed to remove index on stop " + index + "", e);
                 } finally {
                     latch.countDown();
                 }
@@ -256,7 +257,7 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
         }
 
         Map<Index, List<IndexShardStats>> statsByShard = new HashMap<>();
-        for (IndexService indexService : indices.values()) {
+        for (IndexService indexService : this) {
             for (IndexShard indexShard : indexService) {
                 try {
                     if (indexShard.routingEntry() == null) {
@@ -290,17 +291,8 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
         return indices.values().iterator();
     }
 
-    public boolean hasIndex(String index) {
-        return indices.containsKey(index);
-    }
-
-    /**
-     * Returns an IndexService for the specified index if exists otherwise returns <code>null</code>.
-     *
-     */
-    @Nullable
-    public IndexService indexService(String index) {
-        return indices.get(index);
+    public boolean hasIndex(Index index) {
+        return indices.containsKey(index.getUUID());
     }
 
     /**
@@ -309,33 +301,21 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
      */
     @Nullable
     public IndexService indexService(Index index) {
-        return indexService(index.getName());
-    }
-
-    /**
-     * Returns an IndexService for the specified index if exists otherwise a {@link IndexNotFoundException} is thrown.
-     */
-    public IndexService indexServiceSafe(String index) {
-        IndexService indexService = indexService(index);
-        if (indexService == null) {
-            throw new IndexNotFoundException(index);
-        }
-        return indexService;
+        return indices.get(index.getUUID());
     }
 
     /**
      * Returns an IndexService for the specified index if exists otherwise a {@link IndexNotFoundException} is thrown.
      */
     public IndexService indexServiceSafe(Index index) {
-        IndexService indexService = indexServiceSafe(index.getName());
-        if (indexService.indexUUID().equals(index.getUUID()) == false) {
+        IndexService indexService = indices.get(index.getUUID());
+        if (indexService == null) {
             throw new IndexNotFoundException(index);
         }
+        assert indexService.indexUUID().equals(index.getUUID()) : "uuid mismatch local: " + indexService.indexUUID() + " incoming: " + index.getUUID();
         return indexService;
     }
 
-
-
     /**
      * Creates a new {@link IndexService} for the given metadata.
      * @param indexMetaData the index metadata to create the index for
@@ -346,10 +326,13 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
         if (!lifecycle.started()) {
             throw new IllegalStateException("Can't create an index [" + indexMetaData.getIndex() + "], node is closed");
         }
+        if (indexMetaData.getIndexUUID().equals(IndexMetaData.INDEX_UUID_NA_VALUE)) {
+            throw new IllegalArgumentException("index must have a real UUID found value: [" + indexMetaData.getIndexUUID() + "]");
+        }
         final Index index = indexMetaData.getIndex();
         final Predicate<String> indexNameMatcher = (indexExpression) -> indexNameExpressionResolver.matchesIndex(index.getName(), indexExpression, clusterService.state());
         final IndexSettings idxSettings = new IndexSettings(indexMetaData, this.settings, indexNameMatcher, indexScopeSetting);
-        if (indices.containsKey(index.getName())) {
+        if (hasIndex(index)) {
             throw new IndexAlreadyExistsException(index);
         }
         logger.debug("creating Index [{}], shards [{}]/[{}{}]",
@@ -378,7 +361,7 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
         try {
             assert indexService.getIndexEventListener() == listener;
             listener.afterIndexCreated(indexService);
-            indices = newMapBuilder(indices).put(index.getName(), indexService).immutableMap();
+            indices = newMapBuilder(indices).put(index.getUUID(), indexService).immutableMap();
             success = true;
             return indexService;
         } finally {
@@ -395,22 +378,24 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
      * @param index the index to remove
      * @param reason  the high level reason causing this removal
      */
-    public void removeIndex(String index, String reason) {
+    public void removeIndex(Index index, String reason) {
         removeIndex(index, reason, false);
     }
 
-    private void removeIndex(String index, String reason, boolean delete) {
+    private void removeIndex(Index index, String reason, boolean delete) {
+        final String indexName = index.getName();
         try {
             final IndexService indexService;
             final IndexEventListener listener;
             synchronized (this) {
-                if (indices.containsKey(index) == false) {
+                if (hasIndex(index) == false) {
                     return;
                 }
 
-                logger.debug("[{}] closing ... (reason [{}])", index, reason);
+                logger.debug("[{}] closing ... (reason [{}])", indexName, reason);
                 Map<String, IndexService> newIndices = new HashMap<>(indices);
-                indexService = newIndices.remove(index);
+                indexService = newIndices.remove(index.getUUID());
+                assert indexService != null : "IndexService is null for index: " + index;
                 indices = unmodifiableMap(newIndices);
                 listener = indexService.getIndexEventListener();
             }
@@ -419,9 +404,9 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
             if (delete) {
                 listener.beforeIndexDeleted(indexService);
             }
-            logger.debug("[{}] closing index service (reason [{}])", index, reason);
+            logger.debug("{} closing index service (reason [{}])", index, reason);
             indexService.close(reason, delete);
-            logger.debug("[{}] closed... (reason [{}])", index, reason);
+            logger.debug("{} closed... (reason [{}])", index, reason);
             listener.afterIndexClosed(indexService.index(), indexService.getIndexSettings().getSettings());
             if (delete) {
                 final IndexSettings indexSettings = indexService.getIndexSettings();
@@ -474,12 +459,12 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
      * Deletes the given index. Persistent parts of the index
      * like the shards files, state and transaction logs are removed once all resources are released.
      *
-     * Equivalent to {@link #removeIndex(String, String)} but fires
+     * Equivalent to {@link #removeIndex(Index, String)} but fires
      * different lifecycle events to ensure pending resources of this index are immediately removed.
      * @param index the index to delete
      * @param reason the high level reason causing this delete
      */
-    public void deleteIndex(String index, String reason) throws IOException {
+    public void deleteIndex(Index index, String reason) throws IOException {
         removeIndex(index, reason, true);
     }
 
@@ -505,16 +490,17 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
     public void deleteIndexStore(String reason, IndexMetaData metaData, ClusterState clusterState, boolean closed) throws IOException {
         if (nodeEnv.hasNodeFile()) {
             synchronized (this) {
-                String indexName = metaData.getIndex().getName();
-                if (indices.containsKey(indexName)) {
-                    String localUUid = indices.get(indexName).indexUUID();
-                    throw new IllegalStateException("Can't delete index store for [" + indexName + "] - it's still part of the indices service [" + localUUid + "] [" + metaData.getIndexUUID() + "]");
+                Index index = metaData.getIndex();
+                if (hasIndex(index)) {
+                    String localUUid = indexService(index).indexUUID();
+                    throw new IllegalStateException("Can't delete index store for [" + index.getName() + "] - it's still part of the indices service [" + localUUid + "] [" + metaData.getIndexUUID() + "]");
                 }
-                if (clusterState.metaData().hasIndex(indexName) && (clusterState.nodes().localNode().masterNode() == true)) {
+
+                if (clusterState.metaData().hasIndex(index.getName()) && (clusterState.nodes().localNode().masterNode() == true)) {
                     // we do not delete the store if it is a master eligible node and the index is still in the cluster state
                     // because we want to keep the meta data for indices around even if no shards are left here
-                    final IndexMetaData index = clusterState.metaData().index(indexName);
-                    throw new IllegalStateException("Can't delete closed index store for [" + indexName + "] - it's still part of the cluster state [" + index.getIndexUUID() + "] [" + metaData.getIndexUUID() + "]");
+                    final IndexMetaData idxMeta = clusterState.metaData().index(index.getName());
+                    throw new IllegalStateException("Can't delete closed index store for [" + index.getName() + "] - it's still part of the cluster state [" + idxMeta.getIndexUUID() + "] [" + metaData.getIndexUUID() + "]");
                 }
             }
             final IndexSettings indexSettings = buildIndexSettings(metaData);
@@ -607,7 +593,7 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
      * @return true if the index can be deleted on this node
      */
     public boolean canDeleteIndexContents(Index index, IndexSettings indexSettings, boolean closed) {
-        final IndexService indexService = this.indices.get(index.getName());
+        final IndexService indexService = indexService(index);
         // Closed indices may be deleted, even if they are on a shared
         // filesystem. Since it is closed we aren't deleting it for relocation
         if (indexSettings.isOnSharedFilesystem() == false || closed) {
@@ -634,7 +620,7 @@ public class IndicesService extends AbstractLifecycleComponent<IndicesService> i
      */
     public boolean canDeleteShardContent(ShardId shardId, IndexSettings indexSettings) {
         assert shardId.getIndex().equals(indexSettings.getIndex());
-        final IndexService indexService = this.indices.get(shardId.getIndexName());
+        final IndexService indexService = indexService(shardId.getIndex());
         if (indexSettings.isOnSharedFilesystem() == false) {
             if (indexService != null && nodeEnv.hasNodeFile()) {
                 return indexService.hasShard(shardId.id()) == false;

core/src/main/java/org/elasticsearch/indices/cluster/IndicesClusterStateService.java

@@ -46,6 +46,7 @@ import org.elasticsearch.common.lucene.Lucene;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.Callback;
 import org.elasticsearch.common.util.concurrent.ConcurrentCollections;
+import org.elasticsearch.index.Index;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.IndexSettings;
 import org.elasticsearch.index.IndexShardAlreadyExistsException;
@@ -157,13 +158,13 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
             // TODO: this feels a bit hacky here, a block disables state persistence, and then we clean the allocated shards, maybe another flag in blocks?
             if (event.state().blocks().disableStatePersistence()) {
                 for (IndexService indexService : indicesService) {
-                    String index = indexService.index().getName();
+                    Index index = indexService.index();
                     for (Integer shardId : indexService.shardIds()) {
-                        logger.debug("[{}][{}] removing shard (disabled block persistence)", index, shardId);
+                        logger.debug("{}[{}] removing shard (disabled block persistence)", index, shardId);
                         try {
                             indexService.removeShard(shardId, "removing shard (disabled block persistence)");
                         } catch (Throwable e) {
-                            logger.warn("[{}] failed to remove shard (disabled block persistence)", e, index);
+                            logger.warn("{} failed to remove shard (disabled block persistence)", e, index);
                         }
                     }
                     removeIndex(index, "cleaning index (disabled block persistence)");
@@ -201,10 +202,10 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
             }
         }
         for (IndexService indexService : indicesService) {
-            String index = indexService.index().getName();
+            Index index = indexService.index();
             if (indexService.shardIds().isEmpty()) {
                 if (logger.isDebugEnabled()) {
-                    logger.debug("[{}] cleaning index (no shards allocated)", index);
+                    logger.debug("{} cleaning index (no shards allocated)", index);
                 }
                 // clean the index
                 removeIndex(index, "removing index (no shards allocated)");
@@ -222,12 +223,12 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
             if (indexMetaData != null) {
                 if (!indexMetaData.isSameUUID(indexService.indexUUID())) {
                     logger.debug("[{}] mismatch on index UUIDs between cluster state and local state, cleaning the index so it will be recreated", indexMetaData.getIndex());
-                    deleteIndex(indexMetaData.getIndex().getName(), "mismatch on index UUIDs between cluster state and local state, cleaning the index so it will be recreated");
+                    deleteIndex(indexMetaData.getIndex(), "mismatch on index UUIDs between cluster state and local state, cleaning the index so it will be recreated");
                 }
             }
         }
 
-        for (String index : event.indicesDeleted()) {
+        for (Index index : event.indicesDeleted()) {
             if (logger.isDebugEnabled()) {
                 logger.debug("[{}] cleaning index, no longer part of the metadata", index);
             }
@@ -243,7 +244,7 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
                 indicesService.deleteClosedIndex("closed index no longer part of the metadata", metaData, event.state());
             }
             try {
-                nodeIndexDeletedAction.nodeIndexDeleted(event.state(), index, indexSettings, localNodeId);
+                nodeIndexDeletedAction.nodeIndexDeleted(event.state(), index.getName(), indexSettings, localNodeId);
             } catch (Throwable e) {
                 logger.debug("failed to send to master index {} deleted event", e, index);
             }
@@ -298,7 +299,7 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
             return;
         }
         for (ShardRouting shard : routingNode) {
-            if (!indicesService.hasIndex(shard.getIndexName())) {
+            if (!indicesService.hasIndex(shard.index())) {
                 final IndexMetaData indexMetaData = event.state().metaData().index(shard.index());
                 if (logger.isDebugEnabled()) {
                     logger.debug("[{}] creating index", indexMetaData.getIndex());
@@ -317,7 +318,7 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
             return;
         }
         for (IndexMetaData indexMetaData : event.state().metaData()) {
-            if (!indicesService.hasIndex(indexMetaData.getIndex().getName())) {
+            if (!indicesService.hasIndex(indexMetaData.getIndex())) {
                 // we only create / update here
                 continue;
             }
@@ -325,7 +326,7 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
             if (!event.indexMetaDataChanged(indexMetaData)) {
                 continue;
             }
-            String index = indexMetaData.getIndex().getName();
+            Index index = indexMetaData.getIndex();
             IndexService indexService = indicesService.indexService(index);
             if (indexService == null) {
                 // already deleted on us, ignore it
@@ -339,12 +340,12 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
     private void applyMappings(ClusterChangedEvent event) {
         // go over and update mappings
         for (IndexMetaData indexMetaData : event.state().metaData()) {
-            if (!indicesService.hasIndex(indexMetaData.getIndex().getName())) {
+            Index index = indexMetaData.getIndex();
+            if (!indicesService.hasIndex(index)) {
                 // we only create / update here
                 continue;
             }
             boolean requireRefresh = false;
-            String index = indexMetaData.getIndex().getName();
             IndexService indexService = indicesService.indexService(index);
             if (indexService == null) {
                 // got deleted on us, ignore (closing the node)
@@ -357,11 +358,11 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
                     MappingMetaData mappingMd = cursor.value;
                     String mappingType = mappingMd.type();
                     CompressedXContent mappingSource = mappingMd.source();
-                    requireRefresh |= processMapping(index, mapperService, mappingType, mappingSource);
+                    requireRefresh |= processMapping(index.getName(), mapperService, mappingType, mappingSource);
                 }
                 if (requireRefresh && sendRefreshMapping) {
                     nodeMappingRefreshAction.nodeMappingRefresh(event.state(),
-                            new NodeMappingRefreshAction.NodeMappingRefreshRequest(index, indexMetaData.getIndexUUID(),
+                            new NodeMappingRefreshAction.NodeMappingRefreshRequest(index.getName(), indexMetaData.getIndexUUID(),
                                     event.state().nodes().localNodeId())
                     );
                 }
@@ -727,7 +728,7 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
         }
     }
 
-    private void removeIndex(String index, String reason) {
+    private void removeIndex(Index index, String reason) {
         try {
             indicesService.removeIndex(index, reason);
         } catch (Throwable e) {
@@ -735,7 +736,7 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
         }
     }
 
-    private void deleteIndex(String index, String reason) {
+    private void deleteIndex(Index index, String reason) {
         try {
             indicesService.deleteIndex(index, reason);
         } catch (Throwable e) {
@@ -774,7 +775,7 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
     private class FailedShardHandler implements Callback<IndexShard.ShardFailure> {
         @Override
         public void handle(final IndexShard.ShardFailure shardFailure) {
-            final IndexService indexService = indicesService.indexService(shardFailure.routing.shardId().getIndex().getName());
+            final IndexService indexService = indicesService.indexService(shardFailure.routing.shardId().getIndex());
             final ShardRouting shardRouting = shardFailure.routing;
             threadPool.generic().execute(() -> {
                 synchronized (mutex) {

core/src/main/java/org/elasticsearch/indices/recovery/RecoverySource.java

@@ -83,7 +83,7 @@ public class RecoverySource extends AbstractComponent implements IndexEventListe
     }
 
     private RecoveryResponse recover(final StartRecoveryRequest request) throws IOException {
-        final IndexService indexService = indicesService.indexServiceSafe(request.shardId().getIndex().getName());
+        final IndexService indexService = indicesService.indexServiceSafe(request.shardId().getIndex());
         final IndexShard shard = indexService.getShard(request.shardId().id());
 
         // starting recovery from that our (the source) shard state is marking the shard to be in recovery mode as well, otherwise

core/src/main/java/org/elasticsearch/indices/recovery/RecoverySourceHandler.java

@@ -137,7 +137,7 @@ public class RecoverySourceHandler {
                 }
             }
 
-            logger.trace("snapshot translog for recovery. current size is [{}]", translogView.totalOperations());
+            logger.trace("{} snapshot translog for recovery. current size is [{}]", shard.shardId(), translogView.totalOperations());
             try {
                 phase2(translogView.snapshot());
             } catch (Throwable e) {

core/src/main/java/org/elasticsearch/indices/store/IndicesStore.java

@@ -348,7 +348,7 @@ public class IndicesStore extends AbstractComponent implements ClusterStateListe
                 return null;
             }
             ShardId shardId = request.shardId;
-            IndexService indexService = indicesService.indexService(shardId.getIndexName());
+            IndexService indexService = indicesService.indexService(shardId.getIndex());
             if (indexService != null && indexService.indexUUID().equals(request.indexUUID)) {
                 return indexService.getShardOrNull(shardId.id());
             }

core/src/main/java/org/elasticsearch/indices/store/TransportNodesListShardStoreMetaData.java

@@ -126,7 +126,7 @@ public class TransportNodesListShardStoreMetaData extends TransportNodesAction<T
     @Override
     protected NodeStoreFilesMetaData nodeOperation(NodeRequest request) {
         if (request.unallocated) {
-            IndexService indexService = indicesService.indexService(request.shardId.getIndexName());
+            IndexService indexService = indicesService.indexService(request.shardId.getIndex());
             if (indexService == null) {
                 return new NodeStoreFilesMetaData(clusterService.localNode(), null);
             }
@@ -150,7 +150,7 @@ public class TransportNodesListShardStoreMetaData extends TransportNodesAction<T
         long startTimeNS = System.nanoTime();
         boolean exists = false;
         try {
-            IndexService indexService = indicesService.indexService(shardId.getIndexName());
+            IndexService indexService = indicesService.indexService(shardId.getIndex());
             if (indexService != null) {
                 IndexShard indexShard = indexService.getShardOrNull(shardId.id());
                 if (indexShard != null) {

core/src/main/java/org/elasticsearch/node/service/NodeService.java

@@ -84,7 +84,6 @@ public class NodeService extends AbstractComponent implements Closeable {
         this.transportService = transportService;
         this.indicesService = indicesService;
         this.discovery = discovery;
-        discovery.setNodeService(this);
         this.version = version;
         this.pluginService = pluginService;
         this.circuitBreakerService = circuitBreakerService;

core/src/main/java/org/elasticsearch/rest/action/admin/cluster/node/tasks/RestCancelTasksAction.java

@@ -52,10 +52,10 @@ public class RestCancelTasksAction extends BaseRestHandler {
         TaskId parentTaskId = new TaskId(request.param("parent_task_id"));
 
         CancelTasksRequest cancelTasksRequest = new CancelTasksRequest();
-        cancelTasksRequest.taskId(taskId);
-        cancelTasksRequest.nodesIds(nodesIds);
-        cancelTasksRequest.actions(actions);
-        cancelTasksRequest.parentTaskId(parentTaskId);
+        cancelTasksRequest.setTaskId(taskId);
+        cancelTasksRequest.setNodesIds(nodesIds);
+        cancelTasksRequest.setActions(actions);
+        cancelTasksRequest.setParentTaskId(parentTaskId);
         client.admin().cluster().cancelTasks(cancelTasksRequest, new RestToXContentListener<>(channel));
     }
 }

core/src/main/java/org/elasticsearch/rest/action/admin/cluster/node/tasks/RestListTasksAction.java

@@ -50,13 +50,15 @@ public class RestListTasksAction extends BaseRestHandler {
         TaskId taskId = new TaskId(request.param("taskId"));
         String[] actions = Strings.splitStringByCommaToArray(request.param("actions"));
         TaskId parentTaskId = new TaskId(request.param("parent_task_id"));
+        boolean waitForCompletion = request.paramAsBoolean("wait_for_completion", false);
 
         ListTasksRequest listTasksRequest = new ListTasksRequest();
-        listTasksRequest.taskId(taskId);
-        listTasksRequest.nodesIds(nodesIds);
-        listTasksRequest.detailed(detailed);
-        listTasksRequest.actions(actions);
-        listTasksRequest.parentTaskId(parentTaskId);
+        listTasksRequest.setTaskId(taskId);
+        listTasksRequest.setNodesIds(nodesIds);
+        listTasksRequest.setDetailed(detailed);
+        listTasksRequest.setActions(actions);
+        listTasksRequest.setParentTaskId(parentTaskId);
+        listTasksRequest.setWaitForCompletion(waitForCompletion);
         client.admin().cluster().listTasks(listTasksRequest, new RestToXContentListener<>(channel));
     }
 }

core/src/main/java/org/elasticsearch/script/ScriptService.java

@@ -55,7 +55,6 @@ import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.env.Environment;
 import org.elasticsearch.index.query.TemplateQueryParser;
-import org.elasticsearch.search.internal.SearchContext;
 import org.elasticsearch.search.lookup.SearchLookup;
 import org.elasticsearch.watcher.FileChangesListener;
 import org.elasticsearch.watcher.FileWatcher;
@@ -225,6 +224,8 @@ public class ScriptService extends AbstractComponent implements Closeable {
         return scriptEngineService;
     }
 
+
+
     /**
      * Checks if a script can be executed and compiles it if needed, or returns the previously compiled and cached script.
      */
@@ -516,35 +517,43 @@ public class ScriptService extends AbstractComponent implements Closeable {
 
     private class ScriptChangesListener extends FileChangesListener {
 
-        private Tuple<String, String> scriptNameExt(Path file) {
+        private Tuple<String, String> getScriptNameExt(Path file) {
             Path scriptPath = scriptsDirectory.relativize(file);
             int extIndex = scriptPath.toString().lastIndexOf('.');
-            if (extIndex != -1) {
-                String ext = scriptPath.toString().substring(extIndex + 1);
-                String scriptName = scriptPath.toString().substring(0, extIndex).replace(scriptPath.getFileSystem().getSeparator(), "_");
-                return new Tuple<>(scriptName, ext);
-            } else {
+            if (extIndex <= 0) {
                 return null;
             }
+
+            String ext = scriptPath.toString().substring(extIndex + 1);
+            if (ext.isEmpty()) {
+                return null;
+            }
+
+            String scriptName = scriptPath.toString().substring(0, extIndex).replace(scriptPath.getFileSystem().getSeparator(), "_");
+            return new Tuple<>(scriptName, ext);
         }
 
         @Override
         public void onFileInit(Path file) {
+            Tuple<String, String> scriptNameExt = getScriptNameExt(file);
+            if (scriptNameExt == null) {
+                logger.debug("Skipped script with invalid extension : [{}]", file);
+                return;
+            }
             if (logger.isTraceEnabled()) {
                 logger.trace("Loading script file : [{}]", file);
             }
-            Tuple<String, String> scriptNameExt = scriptNameExt(file);
-            if (scriptNameExt != null) {
+
             ScriptEngineService engineService = getScriptEngineServiceForFileExt(scriptNameExt.v2());
             if (engineService == null) {
-                    logger.warn("no script engine found for [{}]", scriptNameExt.v2());
+                logger.warn("No script engine found for [{}]", scriptNameExt.v2());
             } else {
                 try {
                     //we don't know yet what the script will be used for, but if all of the operations for this lang
                     // with file scripts are disabled, it makes no sense to even compile it and cache it.
                     if (isAnyScriptContextEnabled(engineService.getTypes().get(0), engineService, ScriptType.FILE)) {
                         logger.info("compiling script file [{}]", file.toAbsolutePath());
-                            try(InputStreamReader reader = new InputStreamReader(Files.newInputStream(file), StandardCharsets.UTF_8)) {
+                        try (InputStreamReader reader = new InputStreamReader(Files.newInputStream(file), StandardCharsets.UTF_8)) {
                             String script = Streams.copyToString(reader);
                             CacheKey cacheKey = new CacheKey(engineService, scriptNameExt.v1(), null, Collections.emptyMap());
                             staticCache.put(cacheKey, new CompiledScript(ScriptType.FILE, scriptNameExt.v1(), engineService.getTypes().get(0), engineService.compile(script, Collections.emptyMap())));
@@ -558,7 +567,6 @@ public class ScriptService extends AbstractComponent implements Closeable {
                 }
             }
         }
-        }
 
         @Override
         public void onFileCreated(Path file) {
@@ -567,7 +575,7 @@ public class ScriptService extends AbstractComponent implements Closeable {
 
         @Override
         public void onFileDeleted(Path file) {
-            Tuple<String, String> scriptNameExt = scriptNameExt(file);
+            Tuple<String, String> scriptNameExt = getScriptNameExt(file);
             if (scriptNameExt != null) {
                 ScriptEngineService engineService = getScriptEngineServiceForFileExt(scriptNameExt.v2());
                 assert engineService != null;

core/src/main/java/org/elasticsearch/search/SearchException.java

@@ -45,7 +45,7 @@ public class SearchException extends ElasticsearchException implements Elasticse
     public SearchException(StreamInput in) throws IOException {
         super(in);
         if (in.readBoolean()) {
-            shardTarget = SearchShardTarget.readSearchShardTarget(in);
+            shardTarget = new SearchShardTarget(in);
         } else {
             shardTarget = null;
         }
@@ -54,7 +54,12 @@ public class SearchException extends ElasticsearchException implements Elasticse
     @Override
     public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
-        out.writeOptionalStreamable(shardTarget);
+        if (shardTarget == null) {
+            out.writeBoolean(false);
+        } else {
+            out.writeBoolean(true);
+            shardTarget.writeTo(out);
+        }
     }
 
     public SearchShardTarget shard() {

core/src/main/java/org/elasticsearch/search/SearchService.java

@@ -534,10 +534,9 @@ public class SearchService extends AbstractLifecycleComponent<SearchService> imp
     }
 
     final SearchContext createContext(ShardSearchRequest request, @Nullable Engine.Searcher searcher) {
-        IndexService indexService = indicesService.indexServiceSafe(request.index());
-        IndexShard indexShard = indexService.getShard(request.shardId());
-
-        SearchShardTarget shardTarget = new SearchShardTarget(clusterService.localNode().id(), indexShard.shardId().getIndex(), request.shardId());
+        IndexService indexService = indicesService.indexServiceSafe(request.shardId().getIndex());
+        IndexShard indexShard = indexService.getShard(request.shardId().getId());
+        SearchShardTarget shardTarget = new SearchShardTarget(clusterService.localNode().id(), indexShard.shardId());
 
         Engine.Searcher engineSearcher = searcher == null ? indexShard.acquireSearcher("search") : searcher;
 

core/src/main/java/org/elasticsearch/search/SearchShardTarget.java

@@ -23,28 +23,38 @@ import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.Streamable;
+import org.elasticsearch.common.io.stream.Writeable;
 import org.elasticsearch.common.text.Text;
 import org.elasticsearch.index.Index;
+import org.elasticsearch.index.shard.ShardId;
 
 import java.io.IOException;
 
 /**
  * The target that the search request was executed on.
  */
-public class SearchShardTarget implements Streamable, Comparable<SearchShardTarget> {
+public class SearchShardTarget implements Writeable<SearchShardTarget>, Comparable<SearchShardTarget> {
 
     private Text nodeId;
     private Text index;
-    private int shardId;
+    private ShardId shardId;
 
-    private SearchShardTarget() {
+    public SearchShardTarget(StreamInput in) throws IOException {
+        if (in.readBoolean()) {
+            nodeId = in.readText();
+        }
+        shardId = ShardId.readShardId(in);
+        index = new Text(shardId.getIndexName());
+    }
 
+    public SearchShardTarget(String nodeId, ShardId shardId) {
+        this.nodeId = nodeId == null ? null : new Text(nodeId);
+        this.index = new Text(shardId.getIndexName());
+        this.shardId = shardId;
     }
 
     public SearchShardTarget(String nodeId, Index index, int shardId) {
-        this.nodeId = nodeId == null ? null : new Text(nodeId);
-        this.index = new Text(index.getName());
-        this.shardId = shardId;
+        this(nodeId,  new ShardId(index, shardId));
     }
 
     @Nullable
@@ -73,36 +83,26 @@ public class SearchShardTarget implements Streamable, Comparable<SearchShardTarg
         return this.index;
     }
 
-    public int shardId() {
+    public ShardId shardId() {
         return shardId;
     }
 
-    public int getShardId() {
+    public ShardId getShardId() {
         return shardId;
     }
 
-    public static SearchShardTarget readSearchShardTarget(StreamInput in) throws IOException {
-        SearchShardTarget result = new SearchShardTarget();
-        result.readFrom(in);
-        return result;
-    }
-
     @Override
     public int compareTo(SearchShardTarget o) {
         int i = index.string().compareTo(o.index());
         if (i == 0) {
-            i = shardId - o.shardId;
+            i = shardId.getId() - o.shardId.id();
         }
         return i;
     }
 
     @Override
-    public void readFrom(StreamInput in) throws IOException {
-        if (in.readBoolean()) {
-            nodeId = in.readText();
-        }
-        index = in.readText();
-        shardId = in.readVInt();
+    public SearchShardTarget readFrom(StreamInput in) throws IOException {
+        return new SearchShardTarget(in);
     }
 
     @Override
@@ -113,19 +113,15 @@ public class SearchShardTarget implements Streamable, Comparable<SearchShardTarg
             out.writeBoolean(true);
             out.writeText(nodeId);
         }
-        out.writeText(index);
-        out.writeVInt(shardId);
+        shardId.writeTo(out);
     }
 
     @Override
     public boolean equals(Object o) {
         if (this == o) return true;
         if (o == null || getClass() != o.getClass()) return false;
-
         SearchShardTarget that = (SearchShardTarget) o;
-
-        if (shardId != that.shardId) return false;
-        if (index != null ? !index.equals(that.index) : that.index != null) return false;
+        if (shardId.equals(that.shardId) == false) return false;
         if (nodeId != null ? !nodeId.equals(that.nodeId) : that.nodeId != null) return false;
 
         return true;
@@ -135,7 +131,7 @@ public class SearchShardTarget implements Streamable, Comparable<SearchShardTarg
     public int hashCode() {
         int result = nodeId != null ? nodeId.hashCode() : 0;
         result = 31 * result + (index != null ? index.hashCode() : 0);
-        result = 31 * result + shardId;
+        result = 31 * result + shardId.hashCode();
         return result;
     }
 

core/src/main/java/org/elasticsearch/search/controller/SearchPhaseController.java

@@ -76,7 +76,7 @@ public class SearchPhaseController extends AbstractComponent {
         public int compare(AtomicArray.Entry<? extends QuerySearchResultProvider> o1, AtomicArray.Entry<? extends QuerySearchResultProvider> o2) {
             int i = o1.value.shardTarget().index().compareTo(o2.value.shardTarget().index());
             if (i == 0) {
-                i = o1.value.shardTarget().shardId() - o2.value.shardTarget().shardId();
+                i = o1.value.shardTarget().shardId().id() - o2.value.shardTarget().shardId().id();
             }
             return i;
         }

core/src/main/java/org/elasticsearch/search/fetch/ScrollQueryFetchSearchResult.java

@@ -26,7 +26,6 @@ import org.elasticsearch.transport.TransportResponse;
 
 import java.io.IOException;
 
-import static org.elasticsearch.search.SearchShardTarget.readSearchShardTarget;
 import static org.elasticsearch.search.fetch.QueryFetchSearchResult.readQueryFetchSearchResult;
 
 /**
@@ -56,7 +55,7 @@ public class ScrollQueryFetchSearchResult extends TransportResponse {
     @Override
     public void readFrom(StreamInput in) throws IOException {
         super.readFrom(in);
-        shardTarget = readSearchShardTarget(in);
+        shardTarget = new SearchShardTarget(in);
         result = readQueryFetchSearchResult(in);
         result.shardTarget(shardTarget);
     }

core/src/main/java/org/elasticsearch/search/internal/InternalSearchHit.java

@@ -55,7 +55,6 @@ import static java.util.Collections.singletonMap;
 import static java.util.Collections.unmodifiableMap;
 import static org.elasticsearch.common.lucene.Lucene.readExplanation;
 import static org.elasticsearch.common.lucene.Lucene.writeExplanation;
-import static org.elasticsearch.search.SearchShardTarget.readSearchShardTarget;
 import static org.elasticsearch.search.highlight.HighlightField.readHighlightField;
 import static org.elasticsearch.search.internal.InternalSearchHitField.readSearchHitField;
 
@@ -638,7 +637,7 @@ public class InternalSearchHit implements SearchHit {
 
         if (context.streamShardTarget() == ShardTargetType.STREAM) {
             if (in.readBoolean()) {
-                shard = readSearchShardTarget(in);
+                shard = new SearchShardTarget(in);
             }
         } else if (context.streamShardTarget() == ShardTargetType.LOOKUP) {
             int lookupId = in.readVInt();

core/src/main/java/org/elasticsearch/search/internal/InternalSearchHits.java

@@ -34,7 +34,6 @@ import java.util.IdentityHashMap;
 import java.util.Iterator;
 import java.util.Map;
 
-import static org.elasticsearch.search.SearchShardTarget.readSearchShardTarget;
 import static org.elasticsearch.search.internal.InternalSearchHit.readSearchHit;
 
 /**
@@ -216,7 +215,7 @@ public class InternalSearchHits implements SearchHits {
                 // read the lookup table first
                 int lookupSize = in.readVInt();
                 for (int i = 0; i < lookupSize; i++) {
-                    context.handleShardLookup().put(in.readVInt(), readSearchShardTarget(in));
+                    context.handleShardLookup().put(in.readVInt(), new SearchShardTarget(in));
                 }
             }
 

core/src/main/java/org/elasticsearch/search/internal/ShardSearchLocalRequest.java

@@ -58,8 +58,7 @@ import static org.elasticsearch.search.Scroll.readScroll;
 
 public class ShardSearchLocalRequest implements ShardSearchRequest {
 
-    private String index;
-    private int shardId;
+    private ShardId shardId;
     private int numberOfShards;
     private SearchType searchType;
     private Scroll scroll;
@@ -97,8 +96,7 @@ public class ShardSearchLocalRequest implements ShardSearchRequest {
 
     public ShardSearchLocalRequest(ShardId shardId, int numberOfShards, SearchType searchType, SearchSourceBuilder source, String[] types,
             Boolean requestCache) {
-        this.index = shardId.getIndexName();
-        this.shardId = shardId.id();
+        this.shardId = shardId;
         this.numberOfShards = numberOfShards;
         this.searchType = searchType;
         this.source = source;
@@ -106,13 +104,9 @@ public class ShardSearchLocalRequest implements ShardSearchRequest {
         this.requestCache = requestCache;
     }
 
-    @Override
-    public String index() {
-        return index;
-    }
 
     @Override
-    public int shardId() {
+    public ShardId shardId() {
         return shardId;
     }
 
@@ -177,8 +171,7 @@ public class ShardSearchLocalRequest implements ShardSearchRequest {
 
     @SuppressWarnings("unchecked")
     protected void innerReadFrom(StreamInput in) throws IOException {
-        index = in.readString();
-        shardId = in.readVInt();
+        shardId = ShardId.readShardId(in);
         searchType = SearchType.fromId(in.readByte());
         numberOfShards = in.readVInt();
         if (in.readBoolean()) {
@@ -195,8 +188,7 @@ public class ShardSearchLocalRequest implements ShardSearchRequest {
     }
 
     protected void innerWriteTo(StreamOutput out, boolean asKey) throws IOException {
-        out.writeString(index);
-        out.writeVInt(shardId);
+        shardId.writeTo(out);
         out.writeByte(searchType.id());
         if (!asKey) {
             out.writeVInt(numberOfShards);

core/src/main/java/org/elasticsearch/search/internal/ShardSearchRequest.java

@@ -21,6 +21,7 @@ package org.elasticsearch.search.internal;
 
 import org.elasticsearch.action.search.SearchType;
 import org.elasticsearch.common.bytes.BytesReference;
+import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.script.Template;
 import org.elasticsearch.search.Scroll;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
@@ -34,9 +35,7 @@ import java.io.IOException;
  */
 public interface ShardSearchRequest {
 
-    String index();
-
-    int shardId();
+    ShardId shardId();
 
     String[] types();
 

core/src/main/java/org/elasticsearch/search/internal/ShardSearchTransportRequest.java

@@ -28,6 +28,7 @@ import org.elasticsearch.cluster.routing.ShardRouting;
 import org.elasticsearch.common.bytes.BytesReference;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
+import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.script.Template;
 import org.elasticsearch.search.Scroll;
 import org.elasticsearch.search.builder.SearchSourceBuilder;
@@ -71,13 +72,9 @@ public class ShardSearchTransportRequest extends TransportRequest implements Sha
         return originalIndices.indicesOptions();
     }
 
-    @Override
-    public String index() {
-        return shardSearchLocalRequest.index();
-    }
 
     @Override
-    public int shardId() {
+    public ShardId shardId() {
         return shardSearchLocalRequest.shardId();
     }
 

core/src/main/java/org/elasticsearch/search/query/ScrollQuerySearchResult.java

@@ -26,7 +26,6 @@ import org.elasticsearch.transport.TransportResponse;
 
 import java.io.IOException;
 
-import static org.elasticsearch.search.SearchShardTarget.readSearchShardTarget;
 import static org.elasticsearch.search.query.QuerySearchResult.readQuerySearchResult;
 
 /**
@@ -56,7 +55,7 @@ public class ScrollQuerySearchResult extends TransportResponse {
     @Override
     public void readFrom(StreamInput in) throws IOException {
         super.readFrom(in);
-        shardTarget = readSearchShardTarget(in);
+        shardTarget = new SearchShardTarget(in);
         queryResult = readQuerySearchResult(in);
         queryResult.shardTarget(shardTarget);
     }

core/src/main/java/org/elasticsearch/search/sort/FieldSortBuilder.java

@@ -27,16 +27,12 @@ import java.io.IOException;
 /**
  * A sort builder to sort based on a document field.
  */
-public class FieldSortBuilder extends SortBuilder {
+public class FieldSortBuilder extends SortBuilder<FieldSortBuilder> {
 
     private final String fieldName;
 
-    private SortOrder order;
-
     private Object missing;
 
-    private Boolean ignoreUnmapped;
-
     private String unmappedType;
 
     private String sortMode;
@@ -57,36 +53,15 @@ public class FieldSortBuilder extends SortBuilder {
         this.fieldName = fieldName;
     }
 
-    /**
-     * The order of sorting. Defaults to {@link SortOrder#ASC}.
-     */
-    @Override
-    public FieldSortBuilder order(SortOrder order) {
-        this.order = order;
-        return this;
-    }
-
     /**
      * Sets the value when a field is missing in a doc. Can also be set to <tt>_last</tt> or
      * <tt>_first</tt> to sort missing last or first respectively.
      */
-    @Override
     public FieldSortBuilder missing(Object missing) {
         this.missing = missing;
         return this;
     }
 
-    /**
-     * Sets if the field does not exists in the index, it should be ignored and not sorted by or not. Defaults
-     * to <tt>false</tt> (not ignoring).
-     * @deprecated Use {@link #unmappedType(String)} instead.
-     */
-    @Deprecated
-    public FieldSortBuilder ignoreUnmapped(boolean ignoreUnmapped) {
-        this.ignoreUnmapped = ignoreUnmapped;
-        return this;
-    }
-
     /**
      * Set the type to use in case the current field is not mapped in an index.
      * Specifying a type tells Elasticsearch what type the sort values should have, which is important
@@ -132,15 +107,10 @@ public class FieldSortBuilder extends SortBuilder {
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
         builder.startObject(fieldName);
-        if (order != null) {
-            builder.field("order", order.toString());
-        }
+        builder.field(ORDER_FIELD.getPreferredName(), order);
         if (missing != null) {
             builder.field("missing", missing);
         }
-        if (ignoreUnmapped != null) {
-            builder.field(SortParseElement.IGNORE_UNMAPPED.getPreferredName(), ignoreUnmapped);
-        }
         if (unmappedType != null) {
             builder.field(SortParseElement.UNMAPPED_TYPE.getPreferredName(), unmappedType);
         }

core/src/main/java/org/elasticsearch/search/sort/GeoDistanceSortBuilder.java

@@ -44,7 +44,7 @@ import java.util.Objects;
 /**
  * A geo distance based sorting on a geo point like field.
  */
-public class GeoDistanceSortBuilder extends SortBuilder
+public class GeoDistanceSortBuilder extends SortBuilder<GeoDistanceSortBuilder>
         implements ToXContent, NamedWriteable<GeoDistanceSortBuilder>, SortElementParserTemp<GeoDistanceSortBuilder> {
     public static final String NAME = "_geo_distance";
     public static final boolean DEFAULT_COERCE = false;
@@ -57,7 +57,6 @@ public class GeoDistanceSortBuilder extends SortBuilder
 
     private GeoDistance geoDistance = GeoDistance.DEFAULT;
     private DistanceUnit unit = DistanceUnit.DEFAULT;
-    private SortOrder order = SortOrder.ASC;
 
     // TODO there is an enum that covers that parameter which we should be using here
     private String sortMode = null;
@@ -204,30 +203,6 @@ public class GeoDistanceSortBuilder extends SortBuilder
         return this.unit;
     }
 
-    /**
-     * The order of sorting. Defaults to {@link SortOrder#ASC}.
-     */
-    @Override
-    public GeoDistanceSortBuilder order(SortOrder order) {
-        this.order = order;
-        return this;
-    }
-
-    /** Returns the order of sorting. */
-    public SortOrder order() { 
-        return this.order;
-    }
-
-    /**
-     * Not relevant.
-     *
-     * TODO should this throw an exception rather than silently ignore a parameter that is not used?
-     */
-    @Override
-    public GeoDistanceSortBuilder missing(Object missing) {
-        return this;
-    }
-
     /**
      * Defines which distance to use for sorting in the case a document contains multiple geo points.
      * Possible values: min and max
@@ -250,7 +225,7 @@ public class GeoDistanceSortBuilder extends SortBuilder
      * Sets the nested filter that the nested objects should match with in order to be taken into account
      * for sorting.
      */
-    public GeoDistanceSortBuilder setNestedFilter(QueryBuilder nestedFilter) {
+    public GeoDistanceSortBuilder setNestedFilter(QueryBuilder<?> nestedFilter) {
         this.nestedFilter = nestedFilter;
         return this;
     }
@@ -259,7 +234,7 @@ public class GeoDistanceSortBuilder extends SortBuilder
      * Returns the nested filter that the nested objects should match with in order to be taken into account
      * for sorting.
      **/
-    public QueryBuilder getNestedFilter() {
+    public QueryBuilder<?> getNestedFilter() {
         return this.nestedFilter;
     }
 
@@ -312,11 +287,7 @@ public class GeoDistanceSortBuilder extends SortBuilder
 
         builder.field("unit", unit);
         builder.field("distance_type", geoDistance.name().toLowerCase(Locale.ROOT));
-        if (order == SortOrder.DESC) {
-            builder.field("reverse", true);
-        } else {
-            builder.field("reverse", false);
-        }
+        builder.field(ORDER_FIELD.getPreferredName(), order);
 
         if (sortMode != null) {
             builder.field("mode", sortMode);
@@ -419,9 +390,9 @@ public class GeoDistanceSortBuilder extends SortBuilder
         List<GeoPoint> geoPoints = new ArrayList<>();
         DistanceUnit unit = DistanceUnit.DEFAULT;
         GeoDistance geoDistance = GeoDistance.DEFAULT;
-        boolean reverse = false;
+        SortOrder order = SortOrder.ASC;
         MultiValueMode sortMode = null;
-        QueryBuilder nestedFilter = null;
+        QueryBuilder<?> nestedFilter = null;
         String nestedPath = null;
 
         boolean coerce = GeoDistanceSortBuilder.DEFAULT_COERCE;
@@ -451,9 +422,9 @@ public class GeoDistanceSortBuilder extends SortBuilder
                 }
             } else if (token.isValue()) {
                 if ("reverse".equals(currentName)) {
-                    reverse = parser.booleanValue();
+                    order = parser.booleanValue() ? SortOrder.DESC : SortOrder.ASC;
                 } else if ("order".equals(currentName)) {
-                    reverse = "desc".equals(parser.text());
+                    order = SortOrder.fromString(parser.text());
                 } else if ("unit".equals(currentName)) {
                     unit = DistanceUnit.fromString(parser.text());
                 } else if ("distance_type".equals(currentName) || "distanceType".equals(currentName)) {
@@ -484,11 +455,7 @@ public class GeoDistanceSortBuilder extends SortBuilder
         GeoDistanceSortBuilder result = new GeoDistanceSortBuilder(fieldName, geoPoints.toArray(new GeoPoint[geoPoints.size()]));
         result.geoDistance(geoDistance);
         result.unit(unit);
-        if (reverse) {
-            result.order(SortOrder.DESC);
-        } else {
-            result.order(SortOrder.ASC);
-        }
+        result.order(order);
         if (sortMode != null) {
             result.sortMode(sortMode.name());
         }

core/src/main/java/org/elasticsearch/search/sort/GeoDistanceSortParser.java

@@ -43,9 +43,9 @@ import org.elasticsearch.index.fielddata.MultiGeoPointValues;
 import org.elasticsearch.index.fielddata.NumericDoubleValues;
 import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
 import org.elasticsearch.index.mapper.MappedFieldType;
+import org.elasticsearch.index.query.QueryShardContext;
 import org.elasticsearch.index.query.support.NestedInnerQueryParseSupport;
 import org.elasticsearch.search.MultiValueMode;
-import org.elasticsearch.search.internal.SearchContext;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -62,7 +62,7 @@ public class GeoDistanceSortParser implements SortParser {
     }
 
     @Override
-    public SortField parse(XContentParser parser, SearchContext context) throws Exception {
+    public SortField parse(XContentParser parser, QueryShardContext context) throws Exception {
         String fieldName = null;
         List<GeoPoint> geoPoints = new ArrayList<>();
         DistanceUnit unit = DistanceUnit.DEFAULT;
@@ -71,7 +71,7 @@ public class GeoDistanceSortParser implements SortParser {
         MultiValueMode sortMode = null;
         NestedInnerQueryParseSupport nestedHelper = null;
 
-        final boolean indexCreatedBeforeV2_0 = context.indexShard().indexSettings().getIndexVersionCreated().before(Version.V_2_0_0);
+        final boolean indexCreatedBeforeV2_0 = context.indexVersionCreated().before(Version.V_2_0_0);
         boolean coerce = GeoDistanceSortBuilder.DEFAULT_COERCE;
         boolean ignoreMalformed = GeoDistanceSortBuilder.DEFAULT_IGNORE_MALFORMED;
 
@@ -155,12 +155,12 @@ public class GeoDistanceSortParser implements SortParser {
             throw new IllegalArgumentException("sort_mode [sum] isn't supported for sorting by geo distance");
         }
 
-        MappedFieldType fieldType = context.smartNameFieldType(fieldName);
+        MappedFieldType fieldType = context.fieldMapper(fieldName);
         if (fieldType == null) {
             throw new IllegalArgumentException("failed to find mapper for [" + fieldName + "] for geo distance based sort");
         }
         final MultiValueMode finalSortMode = sortMode; // final reference for use in the anonymous class
-        final IndexGeoPointFieldData geoIndexFieldData = context.fieldData().getForField(fieldType);
+        final IndexGeoPointFieldData geoIndexFieldData = context.getForField(fieldType);
         final FixedSourceDistance[] distances = new FixedSourceDistance[geoPoints.size()];
         for (int i = 0; i< geoPoints.size(); i++) {
             distances[i] = geoDistance.fixedSourceDistance(geoPoints.get(i).lat(), geoPoints.get(i).lon(), unit);
@@ -168,15 +168,16 @@ public class GeoDistanceSortParser implements SortParser {
 
         final Nested nested;
         if (nestedHelper != null && nestedHelper.getPath() != null) {
-            BitSetProducer rootDocumentsFilter = context.bitsetFilterCache().getBitSetProducer(Queries.newNonNestedFilter());
-            Query innerDocumentsFilter;
+            BitSetProducer rootDocumentsFilter = context.bitsetFilter(Queries.newNonNestedFilter());
+            Query innerDocumentsQuery;
             if (nestedHelper.filterFound()) {
                 // TODO: use queries instead
-                innerDocumentsFilter = nestedHelper.getInnerFilter();
+                innerDocumentsQuery = nestedHelper.getInnerFilter();
             } else {
-                innerDocumentsFilter = nestedHelper.getNestedObjectMapper().nestedTypeFilter();
+                innerDocumentsQuery = nestedHelper.getNestedObjectMapper().nestedTypeFilter();
             }
-            nested = new Nested(rootDocumentsFilter, context.searcher().createNormalizedWeight(innerDocumentsFilter, false));
+
+            nested = new Nested(rootDocumentsFilter, innerDocumentsQuery);
         } else {
             nested = null;
         }

core/src/main/java/org/elasticsearch/search/sort/ScoreSortBuilder.java

@@ -19,40 +19,103 @@
 
 package org.elasticsearch.search.sort;
 
+import org.elasticsearch.common.ParseField;
+import org.elasticsearch.common.ParseFieldMatcher;
+import org.elasticsearch.common.ParsingException;
+import org.elasticsearch.common.io.stream.NamedWriteable;
+import org.elasticsearch.common.io.stream.StreamInput;
+import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.xcontent.XContentBuilder;
+import org.elasticsearch.common.xcontent.XContentParser;
+import org.elasticsearch.index.query.QueryParseContext;
 
 import java.io.IOException;
+import java.util.Objects;
 
 /**
  * A sort builder allowing to sort by score.
- *
- *
  */
-public class ScoreSortBuilder extends SortBuilder {
+public class ScoreSortBuilder extends SortBuilder<ScoreSortBuilder> implements NamedWriteable<ScoreSortBuilder>,
+    SortElementParserTemp<ScoreSortBuilder> {
 
-    private SortOrder order;
+    private static final String NAME = "_score";
+    static final ScoreSortBuilder PROTOTYPE = new ScoreSortBuilder();
+    public static final ParseField REVERSE_FIELD = new ParseField("reverse");
+    public static final ParseField ORDER_FIELD = new ParseField("order");
 
-    /**
-     * The order of sort scoring. By default, its {@link SortOrder#DESC}.
-     */
-    @Override
-    public ScoreSortBuilder order(SortOrder order) {
-        this.order = order;
-        return this;
+    public ScoreSortBuilder() {
+        // order defaults to desc when sorting on the _score
+        order(SortOrder.DESC);
     }
 
-    @Override
-    public SortBuilder missing(Object missing) {
-        return this;
-    }
 
     @Override
     public XContentBuilder toXContent(XContentBuilder builder, Params params) throws IOException {
-        builder.startObject("_score");
-        if (order == SortOrder.ASC) {
-            builder.field("reverse", true);
-        }
+        builder.startObject(NAME);
+        builder.field(ORDER_FIELD.getPreferredName(), order);
         builder.endObject();
         return builder;
     }
+
+    @Override
+    public ScoreSortBuilder fromXContent(QueryParseContext context, String elementName) throws IOException {
+        XContentParser parser = context.parser();
+        ParseFieldMatcher matcher = context.parseFieldMatcher();
+
+        XContentParser.Token token;
+        String currentName = parser.currentName();
+        ScoreSortBuilder result = new ScoreSortBuilder();
+        while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
+            if (token == XContentParser.Token.FIELD_NAME) {
+                currentName = parser.currentName();
+            } else if (token.isValue()) {
+                if (matcher.match(currentName, REVERSE_FIELD)) {
+                    if (parser.booleanValue()) {
+                        result.order(SortOrder.ASC);
+                    }
+                    // else we keep the default DESC
+                } else if (matcher.match(currentName, ORDER_FIELD)) {
+                    result.order(SortOrder.fromString(parser.text()));
+                } else {
+                    throw new ParsingException(parser.getTokenLocation(), "[" + NAME + "] failed to parse field [" + currentName + "]");
+                }
+            } else {
+                throw new ParsingException(parser.getTokenLocation(), "[" + NAME + "] unexpected token [" + token + "]");
+            }
+        }
+        return result;
+    }
+
+    @Override
+    public boolean equals(Object object) {
+        if (this == object) {
+            return true;
+        }
+        if (object == null || getClass() != object.getClass()) {
+            return false;
+        }
+        ScoreSortBuilder other = (ScoreSortBuilder) object;
+        return Objects.equals(order, other.order);
+    }
+
+    @Override
+    public int hashCode() {
+        return Objects.hash(this.order);
+    }
+
+    @Override
+    public void writeTo(StreamOutput out) throws IOException {
+        order.writeTo(out);
+    }
+
+    @Override
+    public ScoreSortBuilder readFrom(StreamInput in) throws IOException {
+        ScoreSortBuilder builder = new ScoreSortBuilder().order(SortOrder.readOrderFrom(in));
+        return builder;
+    }
+
+    @Override
+    public String getWriteableName() {
+        return NAME;
+    }
 }

core/src/main/java/org/elasticsearch/search/sort/ScriptSortBuilder.java

@@ -28,14 +28,12 @@ import java.io.IOException;
 /**
  * Script sort builder allows to sort based on a custom script expression.
  */
-public class ScriptSortBuilder extends SortBuilder {
+public class ScriptSortBuilder extends SortBuilder<ScriptSortBuilder> {
 
     private Script script;
 
     private final String type;
 
-    private SortOrder order;
-
     private String sortMode;
 
     private QueryBuilder nestedFilter;
@@ -53,23 +51,6 @@ public class ScriptSortBuilder extends SortBuilder {
         this.type = type;
     }
 
-    /**
-     * Sets the sort order.
-     */
-    @Override
-    public ScriptSortBuilder order(SortOrder order) {
-        this.order = order;
-        return this;
-    }
-
-    /**
-     * Not really relevant.
-     */
-    @Override
-    public SortBuilder missing(Object missing) {
-        return this;
-    }
-
     /**
      * Defines which distance to use for sorting in the case a document contains multiple geo points.
      * Possible values: min and max
@@ -83,7 +64,7 @@ public class ScriptSortBuilder extends SortBuilder {
      * Sets the nested filter that the nested objects should match with in order to be taken into account
      * for sorting.
      */
-    public ScriptSortBuilder setNestedFilter(QueryBuilder nestedFilter) {
+    public ScriptSortBuilder setNestedFilter(QueryBuilder<?> nestedFilter) {
         this.nestedFilter = nestedFilter;
         return this;
     }
@@ -102,9 +83,7 @@ public class ScriptSortBuilder extends SortBuilder {
         builder.startObject("_script");
         builder.field("script", script);
         builder.field("type", type);
-        if (order == SortOrder.DESC) {
-            builder.field("reverse", true);
-        }
+        builder.field(ORDER_FIELD.getPreferredName(), order);
         if (sortMode != null) {
             builder.field("mode", sortMode);
         }

core/src/main/java/org/elasticsearch/search/sort/ScriptSortParser.java

@@ -27,6 +27,7 @@ import org.apache.lucene.search.SortField;
 import org.apache.lucene.search.join.BitSetProducer;
 import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.BytesRefBuilder;
+import org.elasticsearch.common.ParsingException;
 import org.elasticsearch.common.lucene.search.Queries;
 import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.index.fielddata.FieldData;
@@ -37,6 +38,7 @@ import org.elasticsearch.index.fielddata.SortedBinaryDocValues;
 import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
 import org.elasticsearch.index.fielddata.fieldcomparator.BytesRefFieldComparatorSource;
 import org.elasticsearch.index.fielddata.fieldcomparator.DoubleValuesComparatorSource;
+import org.elasticsearch.index.query.QueryShardContext;
 import org.elasticsearch.index.query.support.NestedInnerQueryParseSupport;
 import org.elasticsearch.script.LeafSearchScript;
 import org.elasticsearch.script.Script;
@@ -68,7 +70,7 @@ public class ScriptSortParser implements SortParser {
     }
 
     @Override
-    public SortField parse(XContentParser parser, SearchContext context) throws Exception {
+    public SortField parse(XContentParser parser, QueryShardContext context) throws Exception {
         ScriptParameterParser scriptParameterParser = new ScriptParameterParser();
         Script script = null;
         String type = null;
@@ -122,19 +124,20 @@ public class ScriptSortParser implements SortParser {
                 script = new Script(scriptValue.script(), scriptValue.scriptType(), scriptParameterParser.lang(), params);
             }
         } else if (params != null) {
-            throw new SearchParseException(context, "script params must be specified inside script object", parser.getTokenLocation());
+            throw new ParsingException(parser.getTokenLocation(), "script params must be specified inside script object");
         }
 
         if (script == null) {
-            throw new SearchParseException(context, "_script sorting requires setting the script to sort by", parser.getTokenLocation());
+            throw new ParsingException(parser.getTokenLocation(), "_script sorting requires setting the script to sort by");
         }
         if (type == null) {
-            throw new SearchParseException(context, "_script sorting requires setting the type of the script", parser.getTokenLocation());
+            throw new ParsingException(parser.getTokenLocation(), "_script sorting requires setting the type of the script");
         }
-        final SearchScript searchScript = context.scriptService().search(context.lookup(), script, ScriptContext.Standard.SEARCH, Collections.emptyMap());
+        final SearchScript searchScript = context.getScriptService().search(
+                context.lookup(), script, ScriptContext.Standard.SEARCH, Collections.emptyMap());
 
         if (STRING_SORT_TYPE.equals(type) && (sortMode == MultiValueMode.SUM || sortMode == MultiValueMode.AVG)) {
-            throw new SearchParseException(context, "type [string] doesn't support mode [" + sortMode + "]", parser.getTokenLocation());
+            throw new ParsingException(parser.getTokenLocation(), "type [string] doesn't support mode [" + sortMode + "]");
         }
 
         if (sortMode == null) {
@@ -144,7 +147,7 @@ public class ScriptSortParser implements SortParser {
         // If nested_path is specified, then wrap the `fieldComparatorSource` in a `NestedFieldComparatorSource`
         final Nested nested;
         if (nestedHelper != null && nestedHelper.getPath() != null) {
-            BitSetProducer rootDocumentsFilter = context.bitsetFilterCache().getBitSetProducer(Queries.newNonNestedFilter());
+            BitSetProducer rootDocumentsFilter = context.bitsetFilter(Queries.newNonNestedFilter());
             Query innerDocumentsFilter;
             if (nestedHelper.filterFound()) {
                 // TODO: use queries instead
@@ -152,7 +155,7 @@ public class ScriptSortParser implements SortParser {
             } else {
                 innerDocumentsFilter = nestedHelper.getNestedObjectMapper().nestedTypeFilter();
             }
-            nested = new Nested(rootDocumentsFilter, context.searcher().createNormalizedWeight(innerDocumentsFilter, false));
+            nested = new Nested(rootDocumentsFilter, innerDocumentsFilter);
         } else {
             nested = null;
         }
@@ -205,7 +208,7 @@ public class ScriptSortParser implements SortParser {
                 };
                 break;
             default:
-            throw new SearchParseException(context, "custom script sort type [" + type + "] not supported", parser.getTokenLocation());
+            throw new ParsingException(parser.getTokenLocation(), "custom script sort type [" + type + "] not supported");
         }
 
         return new SortField("_script", fieldComparatorSource, reverse);

core/src/main/java/org/elasticsearch/search/sort/SortBuilder.java

@@ -20,14 +20,20 @@
 package org.elasticsearch.search.sort;
 
 import org.elasticsearch.ElasticsearchException;
+import org.elasticsearch.common.ParseField;
 import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.common.xcontent.XContentBuilder;
 import org.elasticsearch.common.xcontent.XContentFactory;
 
+import java.util.Objects;
+
 /**
  *
  */
-public abstract class SortBuilder implements ToXContent {
+public abstract class SortBuilder<T extends SortBuilder<?>> implements ToXContent {
+
+    protected SortOrder order = SortOrder.ASC;
+    public static final ParseField ORDER_FIELD = new ParseField("order");
 
     @Override
     public String toString() {
@@ -42,13 +48,19 @@ public abstract class SortBuilder implements ToXContent {
     }
 
     /**
-     * The order of sorting. Defaults to {@link SortOrder#ASC}.
+     * Set the order of sorting.
      */
-    public abstract SortBuilder order(SortOrder order);
+    @SuppressWarnings("unchecked")
+    public T order(SortOrder order) {
+        Objects.requireNonNull(order, "sort order cannot be null.");
+        this.order = order;
+        return (T) this;
+    }
 
     /**
-     * Sets the value when a field is missing in a doc. Can also be set to <tt>_last</tt> or
-     * <tt>_first</tt> to sort missing last or first respectively.
+     * Return the {@link SortOrder} used for this {@link SortBuilder}.
      */
-    public abstract SortBuilder missing(Object missing);
+    public SortOrder order() {
+        return this.order;
+    }
 }

core/src/main/java/org/elasticsearch/search/sort/SortElementParserTemp.java

@@ -19,13 +19,12 @@
 
 package org.elasticsearch.search.sort;
 
-import org.elasticsearch.common.xcontent.ToXContent;
 import org.elasticsearch.index.query.QueryParseContext;
 
 import java.io.IOException;
 
 // TODO once sort refactoring is done this needs to be merged into SortBuilder
-public interface SortElementParserTemp<T extends ToXContent> {
+public interface SortElementParserTemp<T extends SortBuilder> {
     /**
      * Creates a new SortBuilder from the json held by the {@link SortElementParserTemp}
      * in {@link org.elasticsearch.common.xcontent.XContent} format

core/src/main/java/org/elasticsearch/search/sort/SortParseElement.java

@@ -30,7 +30,6 @@ import org.elasticsearch.common.xcontent.XContentParser;
 import org.elasticsearch.index.fielddata.IndexFieldData;
 import org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource.Nested;
 import org.elasticsearch.index.mapper.MappedFieldType;
-import org.elasticsearch.index.mapper.core.LongFieldMapper;
 import org.elasticsearch.index.query.support.NestedInnerQueryParseSupport;
 import org.elasticsearch.search.MultiValueMode;
 import org.elasticsearch.search.SearchParseElement;
@@ -55,7 +54,6 @@ public class SortParseElement implements SearchParseElement {
     private static final SortField SORT_DOC = new SortField(null, SortField.Type.DOC);
     private static final SortField SORT_DOC_REVERSE = new SortField(null, SortField.Type.DOC, true);
 
-    public static final ParseField IGNORE_UNMAPPED = new ParseField("ignore_unmapped");
     public static final ParseField UNMAPPED_TYPE = new ParseField("unmapped_type");
 
     public static final String SCORE_FIELD_NAME = "_score";
@@ -140,7 +138,7 @@ public class SortParseElement implements SearchParseElement {
                     addSortField(context, sortFields, fieldName, reverse, unmappedType, missing, sortMode, nestedFilterParseHelper);
                 } else {
                     if (PARSERS.containsKey(fieldName)) {
-                        sortFields.add(PARSERS.get(fieldName).parse(parser, context));
+                        sortFields.add(PARSERS.get(fieldName).parse(parser, context.getQueryShardContext()));
                     } else {
                         while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
                             if (token == XContentParser.Token.FIELD_NAME) {
@@ -156,19 +154,13 @@ public class SortParseElement implements SearchParseElement {
                                     }
                                 } else if ("missing".equals(innerJsonName)) {
                                     missing = parser.textOrNull();
-                                } else if (context.parseFieldMatcher().match(innerJsonName, IGNORE_UNMAPPED)) {
-                                    // backward compatibility: ignore_unmapped has been replaced with unmapped_type
-                                    if (unmappedType == null // don't override if unmapped_type has been provided too
-                                            && parser.booleanValue()) {
-                                        unmappedType = LongFieldMapper.CONTENT_TYPE;
-                                    }
                                 } else if (context.parseFieldMatcher().match(innerJsonName, UNMAPPED_TYPE)) {
                                     unmappedType = parser.textOrNull();
                                 } else if ("mode".equals(innerJsonName)) {
                                     sortMode = MultiValueMode.fromString(parser.text());
                                 } else if ("nested_path".equals(innerJsonName) || "nestedPath".equals(innerJsonName)) {
                                     if (nestedFilterParseHelper == null) {
-                                        nestedFilterParseHelper = new NestedInnerQueryParseSupport(parser, context);
+                                        nestedFilterParseHelper = new NestedInnerQueryParseSupport(parser, context.getQueryShardContext());
                                     }
                                     nestedFilterParseHelper.setPath(parser.text());
                                 } else {
@@ -177,7 +169,7 @@ public class SortParseElement implements SearchParseElement {
                             } else if (token == XContentParser.Token.START_OBJECT) {
                                 if ("nested_filter".equals(innerJsonName) || "nestedFilter".equals(innerJsonName)) {
                                     if (nestedFilterParseHelper == null) {
-                                        nestedFilterParseHelper = new NestedInnerQueryParseSupport(parser, context);
+                                        nestedFilterParseHelper = new NestedInnerQueryParseSupport(parser, context.getQueryShardContext());
                                     }
                                     nestedFilterParseHelper.filter();
                                 } else {
@@ -239,14 +231,13 @@ public class SortParseElement implements SearchParseElement {
             final Nested nested;
             if (nestedHelper != null && nestedHelper.getPath() != null) {
                 BitSetProducer rootDocumentsFilter = context.bitsetFilterCache().getBitSetProducer(Queries.newNonNestedFilter());
-                Query innerDocumentsFilter;
+                Query innerDocumentsQuery;
                 if (nestedHelper.filterFound()) {
-                    // TODO: use queries instead
-                    innerDocumentsFilter = nestedHelper.getInnerFilter();
+                    innerDocumentsQuery = nestedHelper.getInnerFilter();
                 } else {
-                    innerDocumentsFilter = nestedHelper.getNestedObjectMapper().nestedTypeFilter();
+                    innerDocumentsQuery = nestedHelper.getNestedObjectMapper().nestedTypeFilter();
                 }
-                nested = new Nested(rootDocumentsFilter,  context.searcher().createNormalizedWeight(innerDocumentsFilter, false));
+                nested = new Nested(rootDocumentsFilter,  innerDocumentsQuery);
             } else {
                 nested = null;
             }

core/src/main/java/org/elasticsearch/search/sort/SortParser.java

@@ -21,7 +21,7 @@ package org.elasticsearch.search.sort;
 
 import org.apache.lucene.search.SortField;
 import org.elasticsearch.common.xcontent.XContentParser;
-import org.elasticsearch.search.internal.SearchContext;
+import org.elasticsearch.index.query.QueryShardContext;
 
 /**
  *
@@ -30,5 +30,5 @@ public interface SortParser {
 
     String[] names();
 
-    SortField parse(XContentParser parser, SearchContext context) throws Exception;
+    SortField parse(XContentParser parser, QueryShardContext context) throws Exception;
 }

core/src/main/java/org/elasticsearch/threadpool/ThreadPool.java

@@ -222,7 +222,7 @@ public class ThreadPool extends AbstractComponent implements Closeable {
         int halfProcMaxAt5 = Math.min(((availableProcessors + 1) / 2), 5);
         int halfProcMaxAt10 = Math.min(((availableProcessors + 1) / 2), 10);
         Map<String, Settings> defaultExecutorTypeSettings = new HashMap<>();
-        add(defaultExecutorTypeSettings, new ExecutorSettingsBuilder(Names.GENERIC).keepAlive("30s"));
+        add(defaultExecutorTypeSettings, new ExecutorSettingsBuilder(Names.GENERIC).size(4 * availableProcessors).keepAlive("30s"));
         add(defaultExecutorTypeSettings, new ExecutorSettingsBuilder(Names.INDEX).size(availableProcessors).queueSize(200));
         add(defaultExecutorTypeSettings, new ExecutorSettingsBuilder(Names.BULK).size(availableProcessors).queueSize(50));
         add(defaultExecutorTypeSettings, new ExecutorSettingsBuilder(Names.GET).size(availableProcessors).queueSize(1000));

core/src/main/java/org/elasticsearch/tribe/TribeService.java

@@ -41,6 +41,8 @@ import org.elasticsearch.common.Priority;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.component.AbstractLifecycleComponent;
 import org.elasticsearch.common.inject.Inject;
+import org.elasticsearch.common.network.NetworkModule;
+import org.elasticsearch.common.network.NetworkService;
 import org.elasticsearch.common.regex.Regex;
 import org.elasticsearch.common.settings.Setting;
 import org.elasticsearch.common.settings.Settings;
@@ -52,7 +54,10 @@ import org.elasticsearch.env.Environment;
 import org.elasticsearch.gateway.GatewayService;
 import org.elasticsearch.node.Node;
 import org.elasticsearch.rest.RestStatus;
+import org.elasticsearch.transport.TransportService;
+import org.elasticsearch.transport.TransportSettings;
 
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.EnumSet;
 import java.util.HashMap;
@@ -154,6 +159,15 @@ public class TribeService extends AbstractLifecycleComponent<TribeService> {
     public static final Set<String> TRIBE_SETTING_KEYS = Sets.newHashSet(TRIBE_NAME_SETTING.getKey(), ON_CONFLICT_SETTING.getKey(),
             BLOCKS_METADATA_INDICES_SETTING.getKey(), BLOCKS_METADATA_SETTING.getKey(), BLOCKS_READ_INDICES_SETTING.getKey(), BLOCKS_WRITE_INDICES_SETTING.getKey(), BLOCKS_WRITE_SETTING.getKey());
 
+    // these settings should be passed through to each tribe client, if they are not set explicitly
+    private static final List<Setting<?>> PASS_THROUGH_SETTINGS = Arrays.asList(
+        NetworkService.GLOBAL_NETWORK_HOST_SETTING,
+        NetworkService.GLOBAL_NETWORK_BINDHOST_SETTING,
+        NetworkService.GLOBAL_NETWORK_PUBLISHHOST_SETTING,
+        TransportSettings.HOST,
+        TransportSettings.BIND_HOST,
+        TransportSettings.PUBLISH_HOST
+    );
     private final String onConflict;
     private final Set<String> droppedIndices = ConcurrentCollections.newConcurrentSet();
 
@@ -167,18 +181,8 @@ public class TribeService extends AbstractLifecycleComponent<TribeService> {
         nodesSettings.remove("blocks"); // remove prefix settings that don't indicate a client
         nodesSettings.remove("on_conflict"); // remove prefix settings that don't indicate a client
         for (Map.Entry<String, Settings> entry : nodesSettings.entrySet()) {
-            Settings.Builder sb = Settings.builder().put(entry.getValue());
-            sb.put("node.name", settings.get("node.name") + "/" + entry.getKey());
-            sb.put(Environment.PATH_HOME_SETTING.getKey(), Environment.PATH_HOME_SETTING.get(settings)); // pass through ES home dir
-            if (Environment.PATH_CONF_SETTING.exists(settings)) {
-                sb.put(Environment.PATH_CONF_SETTING.getKey(), Environment.PATH_CONF_SETTING.get(settings));
-            }
-            sb.put(TRIBE_NAME_SETTING.getKey(), entry.getKey());
-            if (sb.get("http.enabled") == null) {
-                sb.put("http.enabled", false);
-            }
-            sb.put(Node.NODE_CLIENT_SETTING.getKey(), true);
-            nodes.add(new TribeClientNode(sb.build()));
+            Settings clientSettings = buildClientSettings(entry.getKey(), settings, entry.getValue());
+            nodes.add(new TribeClientNode(clientSettings));
         }
 
         this.blockIndicesMetadata = BLOCKS_METADATA_INDICES_SETTING.get(settings).toArray(Strings.EMPTY_ARRAY);
@@ -197,6 +201,46 @@ public class TribeService extends AbstractLifecycleComponent<TribeService> {
         this.onConflict = ON_CONFLICT_SETTING.get(settings);
     }
 
+    // pkg private for testing
+    /**
+     * Builds node settings for a tribe client node from the tribe node's global settings,
+     * combined with tribe specific settings.
+     */
+    static Settings buildClientSettings(String tribeName, Settings globalSettings, Settings tribeSettings) {
+        for (String tribeKey : tribeSettings.getAsMap().keySet()) {
+            if (tribeKey.startsWith("path.")) {
+                throw new IllegalArgumentException("Setting [" + tribeKey + "] not allowed in tribe client [" + tribeName + "]");
+            }
+        }
+        Settings.Builder sb = Settings.builder().put(tribeSettings);
+        sb.put("node.name", globalSettings.get("node.name") + "/" + tribeName);
+        sb.put(Environment.PATH_HOME_SETTING.getKey(), Environment.PATH_HOME_SETTING.get(globalSettings)); // pass through ES home dir
+        if (Environment.PATH_CONF_SETTING.exists(globalSettings)) {
+            sb.put(Environment.PATH_CONF_SETTING.getKey(), Environment.PATH_CONF_SETTING.get(globalSettings));
+        }
+        if (Environment.PATH_PLUGINS_SETTING.exists(globalSettings)) {
+            sb.put(Environment.PATH_PLUGINS_SETTING.getKey(), Environment.PATH_PLUGINS_SETTING.get(globalSettings));
+        }
+        if (Environment.PATH_LOGS_SETTING.exists(globalSettings)) {
+            sb.put(Environment.PATH_LOGS_SETTING.getKey(), Environment.PATH_LOGS_SETTING.get(globalSettings));
+        }
+        if (Environment.PATH_SCRIPTS_SETTING.exists(globalSettings)) {
+            sb.put(Environment.PATH_SCRIPTS_SETTING.getKey(), Environment.PATH_SCRIPTS_SETTING.get(globalSettings));
+        }
+        for (Setting<?> passthrough : PASS_THROUGH_SETTINGS) {
+            if (passthrough.exists(tribeSettings) == false && passthrough.exists(globalSettings)) {
+                sb.put(passthrough.getKey(), globalSettings.get(passthrough.getKey()));
+            }
+        }
+        sb.put(TRIBE_NAME_SETTING.getKey(), tribeName);
+        if (sb.get(NetworkModule.HTTP_ENABLED.getKey()) == null) {
+            sb.put(NetworkModule.HTTP_ENABLED.getKey(), false);
+        }
+        sb.put(Node.NODE_CLIENT_SETTING.getKey(), true);
+        return sb.build();
+    }
+
+
     @Override
     protected void doStart() {
         if (nodes.isEmpty() == false) {

core/src/test/java/org/elasticsearch/action/admin/cluster/node/tasks/CancellableTasksTests.java

@@ -237,8 +237,8 @@ public class CancellableTasksTests extends TaskManagerTestCase {
 
         // Cancel main task
         CancelTasksRequest request = new CancelTasksRequest();
-        request.reason("Testing Cancellation");
-        request.taskId(new TaskId(testNodes[0].discoveryNode.getId(), mainTask.getId()));
+        request.setReason("Testing Cancellation");
+        request.setTaskId(new TaskId(testNodes[0].discoveryNode.getId(), mainTask.getId()));
         // And send the cancellation request to a random node
         CancelTasksResponse response = testNodes[randomIntBetween(0, testNodes.length - 1)].transportCancelTasksAction.execute(request)
             .get();
@@ -270,7 +270,7 @@ public class CancellableTasksTests extends TaskManagerTestCase {
 
         // Make sure that tasks are no longer running
         ListTasksResponse listTasksResponse = testNodes[randomIntBetween(0, testNodes.length - 1)]
-            .transportListTasksAction.execute(new ListTasksRequest().taskId(
+            .transportListTasksAction.execute(new ListTasksRequest().setTaskId(
                 new TaskId(testNodes[0].discoveryNode.getId(), mainTask.getId()))).get();
         assertEquals(0, listTasksResponse.getTasks().size());
 
@@ -313,7 +313,7 @@ public class CancellableTasksTests extends TaskManagerTestCase {
 
         // Make sure that tasks are running
         ListTasksResponse listTasksResponse = testNodes[randomIntBetween(0, testNodes.length - 1)]
-            .transportListTasksAction.execute(new ListTasksRequest().parentTaskId(new TaskId(mainNode, mainTask.getId()))).get();
+            .transportListTasksAction.execute(new ListTasksRequest().setParentTaskId(new TaskId(mainNode, mainTask.getId()))).get();
         assertThat(listTasksResponse.getTasks().size(), greaterThanOrEqualTo(blockOnNodes.size()));
 
         // Simulate the coordinating node leaving the cluster
@@ -331,8 +331,8 @@ public class CancellableTasksTests extends TaskManagerTestCase {
             logger.info("--> Simulate issuing cancel request on the node that is about to leave the cluster");
             // Simulate issuing cancel request on the node that is about to leave the cluster
             CancelTasksRequest request = new CancelTasksRequest();
-            request.reason("Testing Cancellation");
-            request.taskId(new TaskId(testNodes[0].discoveryNode.getId(), mainTask.getId()));
+            request.setReason("Testing Cancellation");
+            request.setTaskId(new TaskId(testNodes[0].discoveryNode.getId(), mainTask.getId()));
             // And send the cancellation request to a random node
             CancelTasksResponse response = testNodes[0].transportCancelTasksAction.execute(request).get();
             logger.info("--> Done simulating issuing cancel request on the node that is about to leave the cluster");
@@ -356,7 +356,7 @@ public class CancellableTasksTests extends TaskManagerTestCase {
             // Make sure that tasks are no longer running
             try {
                 ListTasksResponse listTasksResponse1 = testNodes[randomIntBetween(1, testNodes.length - 1)]
-                    .transportListTasksAction.execute(new ListTasksRequest().taskId(new TaskId(mainNode, mainTask.getId()))).get();
+                    .transportListTasksAction.execute(new ListTasksRequest().setTaskId(new TaskId(mainNode, mainTask.getId()))).get();
                 assertEquals(0, listTasksResponse1.getTasks().size());
             } catch (InterruptedException ex) {
                 Thread.currentThread().interrupt();

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

@@ -18,6 +18,8 @@
  */
 package org.elasticsearch.action.admin.cluster.node.tasks;
 
+import org.elasticsearch.ElasticsearchTimeoutException;
+import org.elasticsearch.action.FailedNodeException;
 import org.elasticsearch.action.ListenableActionFuture;
 import org.elasticsearch.action.admin.cluster.health.ClusterHealthAction;
 import org.elasticsearch.action.admin.cluster.node.tasks.cancel.CancelTasksResponse;
@@ -40,6 +42,7 @@ import org.elasticsearch.test.ESIntegTestCase;
 import org.elasticsearch.test.tasks.MockTaskManager;
 import org.elasticsearch.test.tasks.MockTaskManagerListener;
 import org.elasticsearch.test.transport.MockTransportService;
+import org.elasticsearch.transport.ReceiveTimeoutTransportException;
 
 import java.io.IOException;
 import java.util.ArrayList;
@@ -54,8 +57,11 @@ import java.util.concurrent.TimeUnit;
 import java.util.concurrent.locks.ReentrantLock;
 import java.util.function.Function;
 
+import static org.elasticsearch.common.unit.TimeValue.timeValueMillis;
+import static org.hamcrest.Matchers.either;
 import static org.hamcrest.Matchers.emptyCollectionOf;
 import static org.hamcrest.Matchers.greaterThanOrEqualTo;
+import static org.hamcrest.Matchers.instanceOf;
 import static org.hamcrest.Matchers.lessThanOrEqualTo;
 import static org.hamcrest.Matchers.not;
 
@@ -327,6 +333,78 @@ public class TasksIT extends ESIntegTestCase {
         assertEquals(0, client().admin().cluster().prepareListTasks().setActions(TestTaskPlugin.TestTaskAction.NAME + "[n]").get().getTasks().size());
     }
 
+    public void testTasksListWaitForCompletion() throws Exception {
+        // Start blocking test task
+        ListenableActionFuture<TestTaskPlugin.NodesResponse> future = TestTaskPlugin.TestTaskAction.INSTANCE.newRequestBuilder(client())
+                .execute();
+
+        ListenableActionFuture<ListTasksResponse> waitResponseFuture;
+        try {
+            // Wait for the task to start on all nodes
+            assertBusy(() -> assertEquals(internalCluster().numDataAndMasterNodes(),
+                client().admin().cluster().prepareListTasks().setActions(TestTaskPlugin.TestTaskAction.NAME + "[n]").get().getTasks().size()));
+
+            // Spin up a request to wait for that task to finish
+            waitResponseFuture = client().admin().cluster().prepareListTasks()
+                    .setActions(TestTaskPlugin.TestTaskAction.NAME + "[n]").setWaitForCompletion(true).execute();
+        } finally {
+            // Unblock the request so the wait for completion request can finish
+            TestTaskPlugin.UnblockTestTasksAction.INSTANCE.newRequestBuilder(client()).get();
+        }
+
+        // Now that the task is unblocked the list response will come back
+        ListTasksResponse waitResponse = waitResponseFuture.get();
+        // If any tasks come back then they are the tasks we asked for - it'd be super weird if this wasn't true
+        for (TaskInfo task: waitResponse.getTasks()) {
+            assertEquals(task.getAction(), TestTaskPlugin.TestTaskAction.NAME + "[n]");
+        }
+        // See the next test to cover the timeout case
+
+        future.get();
+    }
+
+    public void testTasksListWaitForTimeout() throws Exception {
+        // Start blocking test task
+        ListenableActionFuture<TestTaskPlugin.NodesResponse> future = TestTaskPlugin.TestTaskAction.INSTANCE.newRequestBuilder(client())
+                .execute();
+        try {
+            // Wait for the task to start on all nodes
+            assertBusy(() -> assertEquals(internalCluster().numDataAndMasterNodes(),
+                client().admin().cluster().prepareListTasks().setActions(TestTaskPlugin.TestTaskAction.NAME + "[n]").get().getTasks().size()));
+
+            // Spin up a request that should wait for those tasks to finish
+            // It will timeout because we haven't unblocked the tasks
+            ListTasksResponse waitResponse = client().admin().cluster().prepareListTasks()
+                    .setActions(TestTaskPlugin.TestTaskAction.NAME + "[n]").setWaitForCompletion(true).setTimeout(timeValueMillis(100))
+                    .get();
+
+            assertFalse(waitResponse.getNodeFailures().isEmpty());
+            for (FailedNodeException failure : waitResponse.getNodeFailures()) {
+                Throwable timeoutException = failure.getCause();
+                // The exception sometimes comes back wrapped depending on the client
+                if (timeoutException.getCause() != null) {
+                    timeoutException = timeoutException.getCause();
+                }
+                assertThat(timeoutException,
+                        either(instanceOf(ElasticsearchTimeoutException.class)).or(instanceOf(ReceiveTimeoutTransportException.class)));
+            }
+        } finally {
+            // Now we can unblock those requests
+            TestTaskPlugin.UnblockTestTasksAction.INSTANCE.newRequestBuilder(client()).get();
+        }
+        future.get();
+    }
+
+    public void testTasksListWaitForNoTask() throws Exception {
+        // Spin up a request to wait for no matching tasks
+        ListenableActionFuture<ListTasksResponse> waitResponseFuture = client().admin().cluster().prepareListTasks()
+                .setActions(TestTaskPlugin.TestTaskAction.NAME + "[n]").setWaitForCompletion(true).setTimeout(timeValueMillis(10))
+                .execute();
+
+        // It should finish quickly and without complaint
+        assertThat(waitResponseFuture.get().getTasks(), emptyCollectionOf(TaskInfo.class));
+    }
+
     @Override
     public void tearDown() throws Exception {
         for (Map.Entry<Tuple<String, String>, RecordingTaskManagerListener> entry : listeners.entrySet()) {

core/src/test/java/org/elasticsearch/action/admin/cluster/node/tasks/TestTaskPlugin.java

@@ -345,7 +345,10 @@ public class TestTaskPlugin extends Plugin {
 
 
     public static class UnblockTestTasksRequest extends BaseTasksRequest<UnblockTestTasksRequest> {
-
+        @Override
+        public boolean match(Task task) {
+            return task instanceof TestTask && super.match(task);
+        }
     }
 
     public static class UnblockTestTasksResponse extends BaseTasksResponse {

core/src/test/java/org/elasticsearch/action/admin/cluster/node/tasks/TransportTasksActionTests.java

@@ -355,7 +355,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
         int testNodeNum = randomIntBetween(0, testNodes.length - 1);
         TestNode testNode = testNodes[testNodeNum];
         ListTasksRequest listTasksRequest = new ListTasksRequest();
-        listTasksRequest.actions("testAction*"); // pick all test actions
+        listTasksRequest.setActions("testAction*"); // pick all test actions
         logger.info("Listing currently running tasks using node [{}]", testNodeNum);
         ListTasksResponse response = testNode.transportListTasksAction.execute(listTasksRequest).get();
         logger.info("Checking currently running tasks");
@@ -371,7 +371,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
         // Check task counts using transport with filtering
         testNode = testNodes[randomIntBetween(0, testNodes.length - 1)];
         listTasksRequest = new ListTasksRequest();
-        listTasksRequest.actions("testAction[n]"); // only pick node actions
+        listTasksRequest.setActions("testAction[n]"); // only pick node actions
         response = testNode.transportListTasksAction.execute(listTasksRequest).get();
         assertEquals(testNodes.length, response.getPerNodeTasks().size());
         for (Map.Entry<DiscoveryNode, List<TaskInfo>> entry : response.getPerNodeTasks().entrySet()) {
@@ -380,7 +380,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
         }
 
         // Check task counts using transport with detailed description
-        listTasksRequest.detailed(true); // same request only with detailed description
+        listTasksRequest.setDetailed(true); // same request only with detailed description
         response = testNode.transportListTasksAction.execute(listTasksRequest).get();
         assertEquals(testNodes.length, response.getPerNodeTasks().size());
         for (Map.Entry<DiscoveryNode, List<TaskInfo>> entry : response.getPerNodeTasks().entrySet()) {
@@ -389,7 +389,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
         }
 
         // Make sure that the main task on coordinating node is the task that was returned to us by execute()
-        listTasksRequest.actions("testAction"); // only pick the main task
+        listTasksRequest.setActions("testAction"); // only pick the main task
         response = testNode.transportListTasksAction.execute(listTasksRequest).get();
         assertEquals(1, response.getTasks().size());
         assertEquals(mainTask.getId(), response.getTasks().get(0).getId());
@@ -417,7 +417,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
 
         // Get the parent task
         ListTasksRequest listTasksRequest = new ListTasksRequest();
-        listTasksRequest.actions("testAction");
+        listTasksRequest.setActions("testAction");
         ListTasksResponse response = testNode.transportListTasksAction.execute(listTasksRequest).get();
         assertEquals(1, response.getTasks().size());
         String parentNode = response.getTasks().get(0).getNode().getId();
@@ -425,7 +425,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
 
         // Find tasks with common parent
         listTasksRequest = new ListTasksRequest();
-        listTasksRequest.parentTaskId(new TaskId(parentNode, parentTaskId));
+        listTasksRequest.setParentTaskId(new TaskId(parentNode, parentTaskId));
         response = testNode.transportListTasksAction.execute(listTasksRequest).get();
         assertEquals(testNodes.length, response.getTasks().size());
         for (TaskInfo task : response.getTasks()) {
@@ -451,7 +451,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
 
         // Get the parent task
         ListTasksRequest listTasksRequest = new ListTasksRequest();
-        listTasksRequest.actions("testAction*");
+        listTasksRequest.setActions("testAction*");
         ListTasksResponse response = testNode.transportListTasksAction.execute(listTasksRequest).get();
         assertEquals(0, response.getTasks().size());
 
@@ -472,7 +472,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
         // Check task counts using transport with filtering
         TestNode testNode = testNodes[randomIntBetween(0, testNodes.length - 1)];
         ListTasksRequest listTasksRequest = new ListTasksRequest();
-        listTasksRequest.actions("testAction[n]"); // only pick node actions
+        listTasksRequest.setActions("testAction[n]"); // only pick node actions
         ListTasksResponse response = testNode.transportListTasksAction.execute(listTasksRequest).get();
         assertEquals(testNodes.length, response.getPerNodeTasks().size());
         for (Map.Entry<DiscoveryNode, List<TaskInfo>> entry : response.getPerNodeTasks().entrySet()) {
@@ -482,7 +482,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
 
         // Check task counts using transport with detailed description
         long minimalDurationNanos = System.nanoTime() - maximumStartTimeNanos;
-        listTasksRequest.detailed(true); // same request only with detailed description
+        listTasksRequest.setDetailed(true); // same request only with detailed description
         response = testNode.transportListTasksAction.execute(listTasksRequest).get();
         assertEquals(testNodes.length, response.getPerNodeTasks().size());
         for (Map.Entry<DiscoveryNode, List<TaskInfo>> entry : response.getPerNodeTasks().entrySet()) {
@@ -518,9 +518,9 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
 
         // Try to cancel main task using action name
         CancelTasksRequest request = new CancelTasksRequest();
-        request.nodesIds(testNodes[0].discoveryNode.getId());
-        request.reason("Testing Cancellation");
-        request.actions(actionName);
+        request.setNodesIds(testNodes[0].discoveryNode.getId());
+        request.setReason("Testing Cancellation");
+        request.setActions(actionName);
         CancelTasksResponse response = testNodes[randomIntBetween(0, testNodes.length - 1)].transportCancelTasksAction.execute(request)
             .get();
 
@@ -532,8 +532,8 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
 
         // Try to cancel main task using id
         request = new CancelTasksRequest();
-        request.reason("Testing Cancellation");
-        request.taskId(new TaskId(testNodes[0].discoveryNode.getId(), task.getId()));
+        request.setReason("Testing Cancellation");
+        request.setTaskId(new TaskId(testNodes[0].discoveryNode.getId(), task.getId()));
         response = testNodes[randomIntBetween(0, testNodes.length - 1)].transportCancelTasksAction.execute(request).get();
 
         // Shouldn't match any tasks since testAction doesn't support cancellation
@@ -544,7 +544,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
 
         // Make sure that task is still running
         ListTasksRequest listTasksRequest = new ListTasksRequest();
-        listTasksRequest.actions(actionName);
+        listTasksRequest.setActions(actionName);
         ListTasksResponse listResponse = testNodes[randomIntBetween(0, testNodes.length - 1)].transportListTasksAction.execute
             (listTasksRequest).get();
         assertEquals(1, listResponse.getPerNodeTasks().size());
@@ -617,7 +617,7 @@ public class TransportTasksActionTests extends TaskManagerTestCase {
         // Run task action on node tasks that are currently running
         // should be successful on all nodes except one
         TestTasksRequest testTasksRequest = new TestTasksRequest();
-        testTasksRequest.actions("testAction[n]"); // pick all test actions
+        testTasksRequest.setActions("testAction[n]"); // pick all test actions
         TestTasksResponse response = tasksActions[0].execute(testTasksRequest).get();
         // Get successful responses from all nodes except one
         assertEquals(testNodes.length - 1, response.tasks.size());

core/src/test/java/org/elasticsearch/action/admin/indices/shards/IndicesShardStoreRequestIT.java

@@ -32,6 +32,7 @@ import org.elasticsearch.cluster.routing.ShardRoutingState;
 import org.elasticsearch.common.collect.ImmutableOpenIntMap;
 import org.elasticsearch.common.collect.ImmutableOpenMap;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.index.Index;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.shard.IndexShard;
 import org.elasticsearch.indices.IndicesService;
@@ -157,6 +158,7 @@ public class IndicesShardStoreRequestIT extends ESIntegTestCase {
                         .put(IndexMetaData.SETTING_NUMBER_OF_SHARDS, "5")
                         .put(MockFSIndexStore.INDEX_CHECK_INDEX_ON_CLOSE_SETTING.getKey(), false)
         ));
+
         indexRandomData(index);
         ensureGreen(index);
 
@@ -165,9 +167,10 @@ public class IndicesShardStoreRequestIT extends ESIntegTestCase {
 
         logger.info("--> corrupt random shard copies");
         Map<Integer, Set<String>> corruptedShardIDMap = new HashMap<>();
+        Index idx = resolveIndex(index);
         for (String node : internalCluster().nodesInclude(index)) {
             IndicesService indexServices = internalCluster().getInstance(IndicesService.class, node);
-            IndexService indexShards = indexServices.indexServiceSafe(index);
+            IndexService indexShards = indexServices.indexServiceSafe(idx);
             for (Integer shardId : indexShards.shardIds()) {
                 IndexShard shard = indexShards.getShard(shardId);
                 if (randomBoolean()) {

core/src/test/java/org/elasticsearch/action/support/single/instance/TransportInstanceSingleOperationActionTests.java

@@ -113,7 +113,7 @@ public class TransportInstanceSingleOperationActionTests extends ESTestCase {
 
         @Override
         protected ShardIterator shards(ClusterState clusterState, Request request) {
-            return clusterState.routingTable().index(request.concreteIndex()).shard(request.shardId).primaryShardIt();
+            return clusterState.routingTable().index(request.concreteIndex()).shard(request.shardId.getId()).primaryShardIt();
         }
     }
 
@@ -178,7 +178,7 @@ public class TransportInstanceSingleOperationActionTests extends ESTestCase {
 
     public void testBasicRequestWorks() throws InterruptedException, ExecutionException, TimeoutException {
         Request request = new Request().index("test");
-        request.shardId = 0;
+        request.shardId = new ShardId("test", "_na_", 0);
         PlainActionFuture<Response> listener = new PlainActionFuture<>();
         clusterService.setState(ClusterStateCreationUtils.state("test", randomBoolean(), ShardRoutingState.STARTED));
         action.new AsyncSingleAction(request, listener).start();
@@ -189,7 +189,7 @@ public class TransportInstanceSingleOperationActionTests extends ESTestCase {
 
     public void testFailureWithoutRetry() throws Exception {
         Request request = new Request().index("test");
-        request.shardId = 0;
+        request.shardId = new ShardId("test", "_na_", 0);
         PlainActionFuture<Response> listener = new PlainActionFuture<>();
         clusterService.setState(ClusterStateCreationUtils.state("test", randomBoolean(), ShardRoutingState.STARTED));
 
@@ -215,7 +215,7 @@ public class TransportInstanceSingleOperationActionTests extends ESTestCase {
 
     public void testSuccessAfterRetryWithClusterStateUpdate() throws Exception {
         Request request = new Request().index("test");
-        request.shardId = 0;
+        request.shardId = new ShardId("test", "_na_", 0);
         PlainActionFuture<Response> listener = new PlainActionFuture<>();
         boolean local = randomBoolean();
         clusterService.setState(ClusterStateCreationUtils.state("test", local, ShardRoutingState.INITIALIZING));
@@ -231,7 +231,7 @@ public class TransportInstanceSingleOperationActionTests extends ESTestCase {
 
     public void testSuccessAfterRetryWithExceptionFromTransport() throws Exception {
         Request request = new Request().index("test");
-        request.shardId = 0;
+        request.shardId = new ShardId("test", "_na_", 0);
         PlainActionFuture<Response> listener = new PlainActionFuture<>();
         boolean local = randomBoolean();
         clusterService.setState(ClusterStateCreationUtils.state("test", local, ShardRoutingState.STARTED));
@@ -250,7 +250,7 @@ public class TransportInstanceSingleOperationActionTests extends ESTestCase {
 
     public void testRetryOfAnAlreadyTimedOutRequest() throws Exception {
         Request request = new Request().index("test").timeout(new TimeValue(0, TimeUnit.MILLISECONDS));
-        request.shardId = 0;
+        request.shardId = new ShardId("test", "_na_", 0);
         PlainActionFuture<Response> listener = new PlainActionFuture<>();
         clusterService.setState(ClusterStateCreationUtils.state("test", randomBoolean(), ShardRoutingState.STARTED));
         action.new AsyncSingleAction(request, listener).start();
@@ -299,7 +299,7 @@ public class TransportInstanceSingleOperationActionTests extends ESTestCase {
             }
         };
         Request request = new Request().index("test");
-        request.shardId = 0;
+        request.shardId = new ShardId("test", "_na_", 0);
         PlainActionFuture<Response> listener = new PlainActionFuture<>();
         clusterService.setState(ClusterStateCreationUtils.state("test", randomBoolean(), ShardRoutingState.STARTED));
         action.new AsyncSingleAction(request, listener).start();

core/src/test/java/org/elasticsearch/bootstrap/BootstrapCheckTests.java

@@ -131,7 +131,7 @@ public class BootstrapCheckTests extends ESTestCase {
     }
 
     public void testMaxNumberOfThreadsCheck() {
-        final int limit = 1 << 15;
+        final int limit = 1 << 11;
         final AtomicLong maxNumberOfThreads = new AtomicLong(randomIntBetween(1, limit - 1));
         final BootstrapCheck.MaxNumberOfThreadsCheck check = new BootstrapCheck.MaxNumberOfThreadsCheck() {
             @Override

core/src/test/java/org/elasticsearch/cluster/ClusterChangedEventTests.java

@@ -30,6 +30,7 @@ import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.collect.MapBuilder;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.transport.DummyTransportAddress;
+import org.elasticsearch.index.Index;
 import org.elasticsearch.test.ESTestCase;
 
 import java.util.ArrayList;
@@ -37,6 +38,7 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
+import java.util.stream.Collectors;
 
 import static org.hamcrest.Matchers.equalTo;
 
@@ -220,7 +222,7 @@ public class ClusterChangedEventTests extends ESTestCase {
             final ClusterState newState = nextState(previousState, changeClusterUUID, addedIndices, delIndices, 0);
             final ClusterChangedEvent event = new ClusterChangedEvent("_na_", newState, previousState);
             final List<String> addsFromEvent = event.indicesCreated();
-            final List<String> delsFromEvent = event.indicesDeleted();
+            final List<String> delsFromEvent = event.indicesDeleted().stream().map((s) -> s.getName()).collect(Collectors.toList());
             Collections.sort(addsFromEvent);
             Collections.sort(delsFromEvent);
             assertThat(addsFromEvent, equalTo(addedIndices));

core/src/test/java/org/elasticsearch/cluster/metadata/WildcardExpressionResolverTests.java

@@ -47,6 +47,8 @@ public class WildcardExpressionResolverTests extends ESTestCase {
         assertThat(newHashSet(resolver.resolve(context, Arrays.asList("test*"))), equalTo(newHashSet("testXXX", "testXYY", "testYYY")));
         assertThat(newHashSet(resolver.resolve(context, Arrays.asList("testX*"))), equalTo(newHashSet("testXXX", "testXYY")));
         assertThat(newHashSet(resolver.resolve(context, Arrays.asList("testX*", "kuku"))), equalTo(newHashSet("testXXX", "testXYY", "kuku")));
+        assertThat(newHashSet(resolver.resolve(context, Arrays.asList("*"))), equalTo(newHashSet("testXXX", "testXYY", "testYYY", "kuku")));
+        assertThat(newHashSet(resolver.resolve(context, Arrays.asList("*", "-kuku"))), equalTo(newHashSet("testXXX", "testXYY", "testYYY")));
     }
 
     public void testConvertWildcardsTests() {
@@ -107,6 +109,18 @@ public class WildcardExpressionResolverTests extends ESTestCase {
         assertThat(newHashSet(resolver.resolve(context, Arrays.asList("*Y*X"))).size(), equalTo(0));
     }
 
+    public void testAll() {
+        MetaData.Builder mdBuilder = MetaData.builder()
+            .put(indexBuilder("testXXX"))
+            .put(indexBuilder("testXYY"))
+            .put(indexBuilder("testYYY"));
+        ClusterState state = ClusterState.builder(new ClusterName("_name")).metaData(mdBuilder).build();
+        IndexNameExpressionResolver.WildcardExpressionResolver resolver = new IndexNameExpressionResolver.WildcardExpressionResolver();
+
+        IndexNameExpressionResolver.Context context = new IndexNameExpressionResolver.Context(state, IndicesOptions.lenientExpandOpen());
+        assertThat(newHashSet(resolver.resolve(context, Arrays.asList("_all"))), equalTo(newHashSet("testXXX", "testXYY", "testYYY")));
+    }
+
     private IndexMetaData.Builder indexBuilder(String index) {
         return IndexMetaData.builder(index).settings(settings(Version.CURRENT).put(IndexMetaData.SETTING_NUMBER_OF_SHARDS, 1).put(IndexMetaData.SETTING_NUMBER_OF_REPLICAS, 0));
     }

core/src/test/java/org/elasticsearch/common/settings/ScopedSettingsTests.java

@@ -216,6 +216,13 @@ public class ScopedSettingsTests extends ESTestCase {
         } catch (IllegalArgumentException e) {
             assertEquals("Failed to parse value [true] for setting [index.number_of_replicas]", e.getMessage());
         }
+
+        try {
+            settings.validate("index.similarity.classic.type", Settings.builder().put("index.similarity.classic.type", "mine").build());
+            fail();
+        } catch (IllegalArgumentException e) {
+            assertEquals("illegal value for [index.similarity.classic] cannot redefine built-in similarity", e.getMessage());
+        }
     }
 
 

core/src/test/java/org/elasticsearch/discovery/DiscoveryWithServiceDisruptionsIT.java

@@ -177,13 +177,17 @@ public class DiscoveryWithServiceDisruptionsIT extends ESIntegTestCase {
     }
 
     private void configureUnicastCluster(int numberOfNodes, @Nullable int[] unicastHostsOrdinals, int minimumMasterNode) throws ExecutionException, InterruptedException {
+        configureUnicastCluster(DEFAULT_SETTINGS, numberOfNodes, unicastHostsOrdinals, minimumMasterNode);
+    }
+
+    private void configureUnicastCluster(Settings settings, int numberOfNodes, @Nullable int[] unicastHostsOrdinals, int minimumMasterNode) throws ExecutionException, InterruptedException {
         if (minimumMasterNode < 0) {
             minimumMasterNode = numberOfNodes / 2 + 1;
         }
         logger.info("---> configured unicast");
         // TODO: Rarely use default settings form some of these
         Settings nodeSettings = Settings.builder()
-                .put(DEFAULT_SETTINGS)
+                .put(settings)
                 .put(ElectMasterService.DISCOVERY_ZEN_MINIMUM_MASTER_NODES_SETTING.getKey(), minimumMasterNode)
                 .build();
 
@@ -196,7 +200,6 @@ public class DiscoveryWithServiceDisruptionsIT extends ESIntegTestCase {
         }
     }
 
-
     /**
      * Test that no split brain occurs under partial network partition. See https://github.com/elastic/elasticsearch/issues/2488
      */
@@ -1075,25 +1078,40 @@ public class DiscoveryWithServiceDisruptionsIT extends ESIntegTestCase {
      * Tests that indices are properly deleted even if there is a master transition in between.
      * Test for https://github.com/elastic/elasticsearch/issues/11665
      */
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/16890")
     public void testIndicesDeleted() throws Exception {
-        configureUnicastCluster(3, null, 2);
+        final Settings settings = Settings.builder()
+                                      .put(DEFAULT_SETTINGS)
+                                      .put(DiscoverySettings.PUBLISH_TIMEOUT_SETTING.getKey(), "0s") // don't wait on isolated data node
+                                      .put(DiscoverySettings.COMMIT_TIMEOUT_SETTING.getKey(), "30s") // wait till cluster state is committed
+                                      .build();
+        final String idxName = "test";
+        configureUnicastCluster(settings, 3, null, 2);
         InternalTestCluster.Async<List<String>> masterNodes = internalCluster().startMasterOnlyNodesAsync(2);
         InternalTestCluster.Async<String> dataNode = internalCluster().startDataOnlyNodeAsync();
         dataNode.get();
-        masterNodes.get();
+        final List<String> allMasterEligibleNodes = masterNodes.get();
         ensureStableCluster(3);
         assertAcked(prepareCreate("test"));
         ensureYellow();
 
-        String masterNode1 = internalCluster().getMasterName();
+        final String masterNode1 = internalCluster().getMasterName();
         NetworkPartition networkPartition = new NetworkUnresponsivePartition(masterNode1, dataNode.get(), getRandom());
         internalCluster().setDisruptionScheme(networkPartition);
         networkPartition.startDisrupting();
-        internalCluster().client(masterNode1).admin().indices().prepareDelete("test").setTimeout("1s").get();
+        // We know this will time out due to the partition, we check manually below to not proceed until
+        // the delete has been applied to the master node and the master eligible node.
+        internalCluster().client(masterNode1).admin().indices().prepareDelete(idxName).setTimeout("0s").get();
+        // Don't restart the master node until we know the index deletion has taken effect on master and the master eligible node.
+        assertBusy(() -> {
+            for (String masterNode : allMasterEligibleNodes) {
+                final ClusterState masterState = internalCluster().clusterService(masterNode).state();
+                assertTrue("index not deleted on " + masterNode, masterState.metaData().hasIndex(idxName) == false &&
+                                                                 masterState.status() == ClusterState.ClusterStateStatus.APPLIED);
+            }
+        });
         internalCluster().restartNode(masterNode1, InternalTestCluster.EMPTY_CALLBACK);
         ensureYellow();
-        assertFalse(client().admin().indices().prepareExists("test").get().isExists());
+        assertFalse(client().admin().indices().prepareExists(idxName).get().isExists());
     }
 
     protected NetworkPartition addRandomPartition() {

core/src/test/java/org/elasticsearch/discovery/zen/ping/unicast/UnicastZenPingIT.java

@@ -33,7 +33,6 @@ import org.elasticsearch.common.util.BigArrays;
 import org.elasticsearch.discovery.zen.elect.ElectMasterService;
 import org.elasticsearch.discovery.zen.ping.PingContextProvider;
 import org.elasticsearch.discovery.zen.ping.ZenPing;
-import org.elasticsearch.node.service.NodeService;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportService;
@@ -82,11 +81,6 @@ public class UnicastZenPingIT extends ESTestCase {
                 return DiscoveryNodes.builder().put(nodeA).localNodeId("UZP_A").build();
             }
 
-            @Override
-            public NodeService nodeService() {
-                return null;
-            }
-
             @Override
             public boolean nodeHasJoinedClusterOnce() {
                 return false;
@@ -101,11 +95,6 @@ public class UnicastZenPingIT extends ESTestCase {
                 return DiscoveryNodes.builder().put(nodeB).localNodeId("UZP_B").build();
             }
 
-            @Override
-            public NodeService nodeService() {
-                return null;
-            }
-
             @Override
             public boolean nodeHasJoinedClusterOnce() {
                 return true;

core/src/test/java/org/elasticsearch/discovery/zen/publish/PublishClusterStateActionTests.java

@@ -43,7 +43,6 @@ import org.elasticsearch.discovery.Discovery;
 import org.elasticsearch.discovery.DiscoverySettings;
 import org.elasticsearch.discovery.zen.DiscoveryNodesProvider;
 import org.elasticsearch.node.Node;
-import org.elasticsearch.node.service.NodeService;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.test.junit.annotations.TestLogging;
 import org.elasticsearch.test.transport.MockTransportService;
@@ -134,11 +133,6 @@ public class PublishClusterStateActionTests extends ESTestCase {
             return clusterState.nodes();
         }
 
-        @Override
-        public NodeService nodeService() {
-            assert false;
-            throw new UnsupportedOperationException("Shouldn't be here");
-        }
     }
 
     public MockNode createMockNode(final String name) throws Exception {

core/src/test/java/org/elasticsearch/index/IndexTests.java

@@ -0,0 +1,44 @@
+/*
+ * 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;
+
+import org.elasticsearch.cluster.ClusterState;
+import org.elasticsearch.common.Strings;
+import org.elasticsearch.test.ESTestCase;
+
+import static org.apache.lucene.util.TestUtil.randomSimpleString;
+import static org.hamcrest.Matchers.containsString;
+import static org.hamcrest.Matchers.not;
+
+public class IndexTests extends ESTestCase {
+    public void testToString() {
+        assertEquals("[name/uuid]", new Index("name", "uuid").toString());
+        assertEquals("[name]", new Index("name", ClusterState.UNKNOWN_UUID).toString());
+
+        Index random = new Index(randomSimpleString(random(), 1, 100),
+                usually() ? Strings.randomBase64UUID(random()) : ClusterState.UNKNOWN_UUID);
+        assertThat(random.toString(), containsString(random.getName()));
+        if (ClusterState.UNKNOWN_UUID.equals(random.getUUID())) {
+            assertThat(random.toString(), not(containsString(random.getUUID())));
+        } else {
+            assertThat(random.toString(), containsString(random.getUUID()));
+        }
+    }
+}

core/src/test/java/org/elasticsearch/index/IndexWithShadowReplicasIT.java

@@ -156,10 +156,11 @@ public class IndexWithShadowReplicasIT extends ESIntegTestCase {
         assertThat(restoreSnapshotResponse.getRestoreInfo().totalShards(), greaterThan(0));
         ensureGreen();
         refresh();
-
+        Index index = resolveIndex("foo-copy");
         for (IndicesService service : internalCluster().getDataNodeInstances(IndicesService.class)) {
-            if (service.hasIndex("foo-copy")) {
-                IndexShard shard = service.indexServiceSafe("foo-copy").getShardOrNull(0);
+
+            if (service.hasIndex(index)) {
+                IndexShard shard = service.indexServiceSafe(index).getShardOrNull(0);
                 if (shard.routingEntry().primary()) {
                     assertFalse(shard instanceof ShadowIndexShard);
                 } else {
@@ -201,8 +202,9 @@ public class IndexWithShadowReplicasIT extends ESIntegTestCase {
         IndicesStatsResponse indicesStatsResponse = client().admin().indices().prepareStats(IDX).clear().setTranslog(true).get();
         assertEquals(2, indicesStatsResponse.getIndex(IDX).getPrimaries().getTranslog().estimatedNumberOfOperations());
         assertEquals(2, indicesStatsResponse.getIndex(IDX).getTotal().getTranslog().estimatedNumberOfOperations());
+        Index index = resolveIndex(IDX);
         for (IndicesService service : internalCluster().getInstances(IndicesService.class)) {
-            IndexService indexService = service.indexService(IDX);
+            IndexService indexService = service.indexService(index);
             if (indexService != null) {
                 IndexShard shard = indexService.getShard(0);
                 TranslogStats translogStats = shard.translogStats();

core/src/test/java/org/elasticsearch/index/IndexingSlowLogTests.java

@@ -36,24 +36,30 @@ import java.io.IOException;
 
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.not;
+import static org.hamcrest.Matchers.startsWith;
 
 public class IndexingSlowLogTests extends ESTestCase {
     public void testSlowLogParsedDocumentPrinterSourceToLog() throws IOException {
         BytesReference source = JsonXContent.contentBuilder().startObject().field("foo", "bar").endObject().bytes();
         ParsedDocument pd = new ParsedDocument(new StringField("uid", "test:id", Store.YES), new LegacyIntField("version", 1, Store.YES), "id",
                 "test", null, 0, -1, null, source, null);
-
+        Index index = new Index("foo", "123");
         // Turning off document logging doesn't log source[]
-        SlowLogParsedDocumentPrinter p = new SlowLogParsedDocumentPrinter(pd, 10, true, 0);
+        SlowLogParsedDocumentPrinter p = new SlowLogParsedDocumentPrinter(index, pd, 10, true, 0);
         assertThat(p.toString(), not(containsString("source[")));
 
         // Turning on document logging logs the whole thing
-        p = new SlowLogParsedDocumentPrinter(pd, 10, true, Integer.MAX_VALUE);
+        p = new SlowLogParsedDocumentPrinter(index, pd, 10, true, Integer.MAX_VALUE);
         assertThat(p.toString(), containsString("source[{\"foo\":\"bar\"}]"));
 
         // And you can truncate the source
-        p = new SlowLogParsedDocumentPrinter(pd, 10, true, 3);
+        p = new SlowLogParsedDocumentPrinter(index, pd, 10, true, 3);
         assertThat(p.toString(), containsString("source[{\"f]"));
+
+        // And you can truncate the source
+        p = new SlowLogParsedDocumentPrinter(index, pd, 10, true, 3);
+        assertThat(p.toString(), containsString("source[{\"f]"));
+        assertThat(p.toString(), startsWith("[foo/123] took"));
     }
 
     public void testReformatSetting() {

core/src/test/java/org/elasticsearch/index/fielddata/AbstractFieldDataTestCase.java

@@ -168,7 +168,7 @@ public abstract class AbstractFieldDataTestCase extends ESSingleNodeTestCase {
 
     protected Nested createNested(IndexSearcher searcher, Query parentFilter, Query childFilter) throws IOException {
         BitsetFilterCache s = indexService.cache().bitsetFilterCache();
-        return new Nested(s.getBitSetProducer(parentFilter), searcher.createNormalizedWeight(childFilter, false));
+        return new Nested(s.getBitSetProducer(parentFilter), childFilter);
     }
 
     public void testEmpty() throws Exception {

core/src/test/java/org/elasticsearch/index/query/AbstractQueryTestCase.java

@@ -140,6 +140,7 @@ public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>>
     protected static final String DATE_FIELD_NAME = "mapped_date";
     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_POINT_FIELD_MAPPING = "type=geo_point,lat_lon=true,geohash=true,geohash_prefix=true";
     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, DOUBLE_FIELD_NAME,
             BOOLEAN_FIELD_NAME, DATE_FIELD_NAME, OBJECT_FIELD_NAME, GEO_POINT_FIELD_NAME, GEO_SHAPE_FIELD_NAME };
@@ -300,7 +301,7 @@ public abstract class AbstractQueryTestCase<QB extends AbstractQueryBuilder<QB>>
                     BOOLEAN_FIELD_NAME, "type=boolean",
                     DATE_FIELD_NAME, "type=date",
                     OBJECT_FIELD_NAME, "type=object",
-                    GEO_POINT_FIELD_NAME, "type=geo_point,lat_lon=true,geohash=true,geohash_prefix=true",
+                    GEO_POINT_FIELD_NAME, GEO_POINT_FIELD_MAPPING,
                     GEO_SHAPE_FIELD_NAME, "type=geo_shape"
             ).string()), MapperService.MergeReason.MAPPING_UPDATE, false);
             // also add mappings for two inner field in the object field

core/src/test/java/org/elasticsearch/index/query/GeoDistanceRangeQueryTests.java

@@ -24,10 +24,12 @@ import org.apache.lucene.spatial.geopoint.search.GeoPointDistanceRangeQuery;
 import org.apache.lucene.spatial.util.GeoDistanceUtils;
 import org.apache.lucene.util.NumericUtils;
 import org.elasticsearch.Version;
+import org.elasticsearch.common.compress.CompressedXContent;
 import org.elasticsearch.common.geo.GeoDistance;
 import org.elasticsearch.common.geo.GeoPoint;
 import org.elasticsearch.common.geo.GeoUtils;
 import org.elasticsearch.common.unit.DistanceUnit;
+import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.index.search.geo.GeoDistanceRangeQuery;
 import org.elasticsearch.test.geo.RandomGeoGenerator;
 
@@ -296,6 +298,36 @@ public class GeoDistanceRangeQueryTests extends AbstractQueryTestCase<GeoDistanc
         }
     }
 
+    public void testNestedRangeQuery() throws IOException {
+        // create a nested geo_point type with a subfield named "geohash" (explicit testing for ISSUE #15179)
+        MapperService mapperService = queryShardContext().getMapperService();
+        String nestedMapping =
+            "{\"nested_doc\" : {\"properties\" : {" +
+            "\"locations\": {\"properties\": {" +
+            "\"geohash\": {\"type\": \"geo_point\"}}," +
+            "\"type\": \"nested\"}" +
+            "}}}";
+        mapperService.merge("nested_doc", new CompressedXContent(nestedMapping), MapperService.MergeReason.MAPPING_UPDATE, false);
+
+        // create a range query on the nested locations.geohash sub-field
+        String queryJson =
+            "{\n" +
+            "  \"nested\": {\n" +
+            "    \"path\": \"locations\",\n" +
+            "    \"query\": {\n" +
+            "      \"geo_distance_range\": {\n" +
+            "        \"from\": \"0.0km\",\n" +
+            "        \"to\" : \"200.0km\",\n" +
+            "        \"locations.geohash\": \"s7ws01wyd7ws\"\n" +
+            "      }\n" +
+            "    }\n" +
+            "  }\n" +
+            "}\n";
+        NestedQueryBuilder builder = (NestedQueryBuilder) parseQuery(queryJson);
+        QueryShardContext context = createShardContext();
+        builder.toQuery(context);
+    }
+
     public void testFromJson() throws IOException {
         String json =
                 "{\n" +

core/src/test/java/org/elasticsearch/index/query/GeohashCellQueryBuilderTests.java

@@ -63,7 +63,7 @@ public class GeohashCellQueryBuilderTests extends AbstractQueryTestCase<Builder>
             assertThat(query, instanceOf(TermQuery.class));
             TermQuery termQuery = (TermQuery) query;
             Term term = termQuery.getTerm();
-            assertThat(term.field(), equalTo(queryBuilder.fieldName() + GeoPointFieldMapper.Names.GEOHASH_SUFFIX));
+            assertThat(term.field(), equalTo(queryBuilder.fieldName() + "." + GeoPointFieldMapper.Names.GEOHASH));
             String geohash = queryBuilder.geohash();
             if (queryBuilder.precision() != null) {
                 int len = Math.min(queryBuilder.precision(), geohash.length());

core/src/test/java/org/elasticsearch/index/query/NestedQueryBuilderTests.java

@@ -52,6 +52,7 @@ public class NestedQueryBuilderTests extends AbstractQueryTestCase<NestedQueryBu
                 BOOLEAN_FIELD_NAME, "type=boolean",
                 DATE_FIELD_NAME, "type=date",
                 OBJECT_FIELD_NAME, "type=object",
+                GEO_POINT_FIELD_NAME, GEO_POINT_FIELD_MAPPING,
                 "nested1", "type=nested"
         ).string()), MapperService.MergeReason.MAPPING_UPDATE, false);
     }

core/src/test/java/org/elasticsearch/index/query/plugin/CustomQueryParserIT.java

@@ -68,7 +68,7 @@ public class CustomQueryParserIT extends ESIntegTestCase {
 
     private static QueryShardContext queryShardContext() {
         IndicesService indicesService = internalCluster().getDataNodeInstance(IndicesService.class);
-        return indicesService.indexServiceSafe("index").newQueryShardContext();
+        return indicesService.indexServiceSafe(resolveIndex("index")).newQueryShardContext();
     }
 
     //see #11120