Merge pull request #12150 from martijnvg/aliases/remove_strict_filter_parsing

Don't require fields in alias filters to exist in the mapping

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

@@ -145,7 +145,6 @@ public class AliasValidator extends AbstractComponent {
         QueryParseContext context = indexQueryParserService.getParseContext();
         try {
             context.reset(parser);
-            context.setAllowUnmappedFields(false);
             context.parseInnerFilter();
         } finally {
             context.reset(null);

core/src/test/java/org/elasticsearch/aliases/IndexAliasesTests.java

@@ -29,7 +29,6 @@ import org.elasticsearch.action.admin.indices.alias.get.GetAliasesResponse;
 import org.elasticsearch.action.admin.indices.create.CreateIndexRequestBuilder;
 import org.elasticsearch.action.index.IndexResponse;
 import org.elasticsearch.action.search.SearchResponse;
-import org.elasticsearch.action.search.SearchType;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.metadata.AliasAction;
 import org.elasticsearch.cluster.metadata.AliasMetaData;
@@ -39,7 +38,6 @@ import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.index.query.QueryBuilder;
 import org.elasticsearch.index.query.QueryBuilders;
-import org.elasticsearch.index.query.QueryParsingException;
 import org.elasticsearch.rest.action.admin.indices.alias.delete.AliasesMissingException;
 import org.elasticsearch.search.SearchHit;
 import org.elasticsearch.search.SearchHits;
@@ -909,29 +907,21 @@ public class IndexAliasesTests extends ElasticsearchIntegrationTest {
     }
 
     @Test
+    // Before 2.0 alias filters were parsed at alias creation time, in order
+    // for filters to work correctly ES required that fields mentioned in those
+    // filters exist in the mapping.
+    // From 2.0 and higher alias filters are parsed at request time and therefor
+    // fields mentioned in filters don't need to exist in the mapping.
     public void testAddAliasWithFilterNoMapping() throws Exception {
         assertAcked(prepareCreate("test"));
-
-        try {
-            client().admin().indices().prepareAliases()
-                    .addAlias("test", "a", QueryBuilders.termQuery("field1", "term"))
-                    .get();
-            fail();
-        } catch (IllegalArgumentException e) {
-            assertThat(e.getCause(), instanceOf(QueryParsingException.class));
-        }
-
-        try {
-            client().admin().indices().prepareAliases()
-                    .addAlias("test", "a", QueryBuilders.rangeQuery("field2").from(0).to(1))
-                    .get();
-            fail();
-        } catch (IllegalArgumentException e) {
-            assertThat(e.getCause(), instanceOf(QueryParsingException.class));
-        }
-
         client().admin().indices().prepareAliases()
-                .addAlias("test", "a", QueryBuilders.matchAllQuery()) // <-- no fail, b/c no field mentioned
+                .addAlias("test", "a", QueryBuilders.termQuery("field1", "term"))
+                .get();
+        client().admin().indices().prepareAliases()
+                .addAlias("test", "a", QueryBuilders.rangeQuery("field2").from(0).to(1))
+                .get();
+        client().admin().indices().prepareAliases()
+                .addAlias("test", "a", QueryBuilders.matchAllQuery())
                 .get();
     }
 

core/src/test/java/org/elasticsearch/indices/template/SimpleIndexTemplateTests.java

@@ -20,9 +20,7 @@ package org.elasticsearch.indices.template;
 
 import com.google.common.collect.Lists;
 import com.google.common.collect.Sets;
-
 import org.elasticsearch.ElasticsearchParseException;
-import org.elasticsearch.ExceptionsHelper;
 import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.admin.indices.alias.Alias;
 import org.elasticsearch.action.admin.indices.alias.get.GetAliasesResponse;
@@ -33,7 +31,6 @@ import org.elasticsearch.action.bulk.BulkResponse;
 import org.elasticsearch.action.index.IndexRequest;
 import org.elasticsearch.action.search.SearchResponse;
 import org.elasticsearch.cluster.metadata.AliasMetaData;
-import org.elasticsearch.common.compress.CompressedXContent;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentFactory;
 import org.elasticsearch.index.query.QueryBuilders;
@@ -44,12 +41,10 @@ import org.elasticsearch.search.SearchHit;
 import org.elasticsearch.test.ElasticsearchIntegrationTest;
 import org.junit.Test;
 
-import java.io.IOException;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Set;
 
-import static org.elasticsearch.index.query.QueryBuilders.termQuery;
 import static org.elasticsearch.index.query.QueryBuilders.termQuery;
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.*;
 import static org.hamcrest.Matchers.*;
@@ -659,17 +654,21 @@ public class SimpleIndexTemplateTests extends ElasticsearchIntegrationTest {
         assertThat(response.getItems()[0].getId(), equalTo("test"));
         assertThat(response.getItems()[0].getVersion(), equalTo(1l));
 
-        try {
-            client().prepareIndex("d1", "test", "test").setSource("{}").get();
-            fail();
-        } catch (Exception e) {
-            assertThat(ExceptionsHelper.unwrapCause(e), instanceOf(IllegalArgumentException.class));
-            assertThat(e.getMessage(), containsString("failed to parse filter for alias [alias4]"));
-        }
+        // Before 2.0 alias filters were parsed at alias creation time, in order
+        // for filters to work correctly ES required that fields mentioned in those
+        // filters exist in the mapping.
+        // From 2.0 and higher alias filters are parsed at request time and therefor
+        // fields mentioned in filters don't need to exist in the mapping.
+        // So the aliases defined in the index template for this index will not fail
+        // even though the fields in the alias fields don't exist yet and indexing into
+        // an index that doesn't exist yet will succeed
+        client().prepareIndex("d1", "test", "test").setSource("{}").get();
+
         response = client().prepareBulk().add(new IndexRequest("d2", "test", "test").source("{}")).get();
-        assertThat(response.hasFailures(), is(true));
-        assertThat(response.getItems()[0].isFailed(), equalTo(true));
-        assertThat(response.getItems()[0].getFailureMessage(), containsString("failed to parse filter for alias [alias4]"));
+        assertThat(response.hasFailures(), is(false));
+        assertThat(response.getItems()[0].isFailed(), equalTo(false));
+        assertThat(response.getItems()[0].getId(), equalTo("test"));
+        assertThat(response.getItems()[0].getVersion(), equalTo(1l));
     }
 
 }

docs/reference/migration/migrate_2_0.asciidoc

@@ -770,3 +770,8 @@ For the record, official plugins which can use this new simplified form are:
 * elasticsearch-lang-javascript
 * elasticsearch-lang-python
 
+=== Aliases
+
+Fields used in alias filters no longer have to exist in the mapping upon alias creation time. Alias filters are now
+parsed at request time and then the fields in filters are resolved from the mapping, whereas before alias filters were
+parsed at alias creation time and the parsed form was kept around in memory.