Merge branch 'master' into feature/query-refactoring

core/src/main/java/org/apache/lucene/queryparser/classic/MapperQueryParser.java

@@ -374,9 +374,9 @@ public class MapperQueryParser extends QueryParser {
                 Query rangeQuery;
                 if (currentFieldType instanceof DateFieldMapper.DateFieldType && settings.timeZone() != null) {
                     DateFieldMapper.DateFieldType dateFieldType = (DateFieldMapper.DateFieldType) this.currentFieldType;
-                    rangeQuery = dateFieldType.rangeQuery(part1, part2, startInclusive, endInclusive, settings.timeZone(), null, parseContext);
+                    rangeQuery = dateFieldType.rangeQuery(part1, part2, startInclusive, endInclusive, settings.timeZone(), null);
                 } else {
-                    rangeQuery = currentFieldType.rangeQuery(part1, part2, startInclusive, endInclusive, parseContext);
+                    rangeQuery = currentFieldType.rangeQuery(part1, part2, startInclusive, endInclusive);
                 }
                 return rangeQuery;
             } catch (RuntimeException e) {

core/src/main/java/org/elasticsearch/action/admin/indices/analyze/AnalyzeRequest.java

@@ -19,7 +19,7 @@
 package org.elasticsearch.action.admin.indices.analyze;
 
 import org.elasticsearch.action.ActionRequestValidationException;
-import org.elasticsearch.action.support.single.custom.SingleCustomOperationRequest;
+import org.elasticsearch.action.support.single.shard.SingleShardRequest;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
@@ -32,7 +32,7 @@ import static org.elasticsearch.action.ValidateActions.addValidationError;
  * A request to analyze a text associated with a specific index. Allow to provide
  * the actual analyzer name to perform the analysis with.
  */
-public class AnalyzeRequest extends SingleCustomOperationRequest<AnalyzeRequest> {
+public class AnalyzeRequest extends SingleShardRequest<AnalyzeRequest> {
 
     private String[] text;
 
@@ -114,7 +114,7 @@ public class AnalyzeRequest extends SingleCustomOperationRequest<AnalyzeRequest>
 
     @Override
     public ActionRequestValidationException validate() {
-        ActionRequestValidationException validationException = super.validate();
+        ActionRequestValidationException validationException = null;
         if (text == null || text.length == 0) {
             validationException = addValidationError("text is missing", validationException);
         }

core/src/main/java/org/elasticsearch/action/admin/indices/analyze/AnalyzeRequestBuilder.java

@@ -18,13 +18,13 @@
  */
 package org.elasticsearch.action.admin.indices.analyze;
 
-import org.elasticsearch.action.support.single.custom.SingleCustomOperationRequestBuilder;
+import org.elasticsearch.action.support.single.shard.SingleShardOperationRequestBuilder;
 import org.elasticsearch.client.ElasticsearchClient;
 
 /**
  *
  */
-public class AnalyzeRequestBuilder extends SingleCustomOperationRequestBuilder<AnalyzeRequest, AnalyzeResponse, AnalyzeRequestBuilder> {
+public class AnalyzeRequestBuilder extends SingleShardOperationRequestBuilder<AnalyzeRequest, AnalyzeResponse, AnalyzeRequestBuilder> {
 
     public AnalyzeRequestBuilder(ElasticsearchClient client, AnalyzeAction action) {
         super(client, action, new AnalyzeRequest());
@@ -34,15 +34,6 @@ public class AnalyzeRequestBuilder extends SingleCustomOperationRequestBuilder<A
         super(client, action, new AnalyzeRequest(index).text(text));
     }
 
-    /**
-     * Sets the index to use to analyzer the text (for example, if it holds specific analyzers
-     * registered).
-     */
-    public AnalyzeRequestBuilder setIndex(String index) {
-        request.index(index);
-        return this;
-    }
-
     /**
      * Sets the analyzer name to use in order to analyze the text.
      *

core/src/main/java/org/elasticsearch/action/admin/indices/analyze/TransportAnalyzeAction.java

@@ -29,7 +29,7 @@ import org.apache.lucene.util.IOUtils;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.Version;
 import org.elasticsearch.action.support.ActionFilters;
-import org.elasticsearch.action.support.single.custom.TransportSingleCustomOperationAction;
+import org.elasticsearch.action.support.single.shard.TransportSingleShardAction;
 import org.elasticsearch.cluster.ClusterService;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.block.ClusterBlockException;
@@ -54,7 +54,7 @@ import java.util.List;
 /**
  * Transport action used to execute analyze requests
  */
-public class TransportAnalyzeAction extends TransportSingleCustomOperationAction<AnalyzeRequest, AnalyzeResponse> {
+public class TransportAnalyzeAction extends TransportSingleShardAction<AnalyzeRequest, AnalyzeResponse> {
 
     private final IndicesService indicesService;
     private final IndicesAnalysisService indicesAnalysisService;

core/src/main/java/org/elasticsearch/action/admin/indices/mapping/get/GetFieldMappingsIndexRequest.java

@@ -19,16 +19,17 @@
 
 package org.elasticsearch.action.admin.indices.mapping.get;
 
+import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.OriginalIndices;
 import org.elasticsearch.action.support.IndicesOptions;
-import org.elasticsearch.action.support.single.custom.SingleCustomOperationRequest;
+import org.elasticsearch.action.support.single.shard.SingleShardRequest;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 
 import java.io.IOException;
 
-class GetFieldMappingsIndexRequest extends SingleCustomOperationRequest<GetFieldMappingsIndexRequest> {
+class GetFieldMappingsIndexRequest extends SingleShardRequest<GetFieldMappingsIndexRequest> {
 
     private boolean probablySingleFieldRequest;
     private boolean includeDefaults;
@@ -42,7 +43,6 @@ class GetFieldMappingsIndexRequest extends SingleCustomOperationRequest<GetField
 
     GetFieldMappingsIndexRequest(GetFieldMappingsRequest other, String index, boolean probablySingleFieldRequest) {
         super(other);
-        this.preferLocal(other.local);
         this.probablySingleFieldRequest = probablySingleFieldRequest;
         this.includeDefaults = other.includeDefaults();
         this.types = other.types();
@@ -52,6 +52,11 @@ class GetFieldMappingsIndexRequest extends SingleCustomOperationRequest<GetField
         this.originalIndices = new OriginalIndices(other);
     }
 
+    @Override
+    public ActionRequestValidationException validate() {
+        return null;
+    }
+
     public String[] types() {
         return types;
     }
@@ -88,11 +93,6 @@ class GetFieldMappingsIndexRequest extends SingleCustomOperationRequest<GetField
         OriginalIndices.writeOriginalIndices(originalIndices, out);
     }
 
-    @Override
-    protected void writeIndex(StreamOutput out) throws IOException {
-        out.writeString(index());
-    }
-
     @Override
     public void readFrom(StreamInput in) throws IOException {
         super.readFrom(in);
@@ -103,8 +103,4 @@ class GetFieldMappingsIndexRequest extends SingleCustomOperationRequest<GetField
         originalIndices = OriginalIndices.readOriginalIndices(in);
     }
 
-    @Override
-    protected void readIndex(StreamInput in) throws IOException {
-        index(in.readString());
-    }
 }

core/src/main/java/org/elasticsearch/action/admin/indices/mapping/get/TransportGetFieldMappingsIndexAction.java

@@ -26,7 +26,7 @@ import com.google.common.collect.Lists;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.action.admin.indices.mapping.get.GetFieldMappingsResponse.FieldMappingMetaData;
 import org.elasticsearch.action.support.ActionFilters;
-import org.elasticsearch.action.support.single.custom.TransportSingleCustomOperationAction;
+import org.elasticsearch.action.support.single.shard.TransportSingleShardAction;
 import org.elasticsearch.cluster.ClusterService;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.block.ClusterBlockException;
@@ -58,7 +58,7 @@ import java.util.Iterator;
 /**
  * Transport action used to retrieve the mappings related to fields that belong to a specific index
  */
-public class TransportGetFieldMappingsIndexAction extends TransportSingleCustomOperationAction<GetFieldMappingsIndexRequest, GetFieldMappingsResponse> {
+public class TransportGetFieldMappingsIndexAction extends TransportSingleShardAction<GetFieldMappingsIndexRequest, GetFieldMappingsResponse> {
 
     private static final String ACTION_NAME = GetFieldMappingsAction.NAME + "[index]";
 

core/src/main/java/org/elasticsearch/action/explain/ExplainRequest.java

@@ -152,7 +152,7 @@ public class ExplainRequest extends SingleShardRequest<ExplainRequest> {
 
     @Override
     public ActionRequestValidationException validate() {
-        ActionRequestValidationException validationException = super.validate();
+        ActionRequestValidationException validationException = super.validateNonNullIndex();
         if (type == null) {
             validationException = ValidateActions.addValidationError("type is missing", validationException);
         }

core/src/main/java/org/elasticsearch/action/explain/TransportExplainAction.java

@@ -88,7 +88,7 @@ public class TransportExplainAction extends TransportSingleShardAction<ExplainRe
     }
 
     @Override
-    protected boolean resolveIndex() {
+    protected boolean resolveIndex(ExplainRequest request) {
         return true;
     }
 

core/src/main/java/org/elasticsearch/action/get/GetRequest.java

@@ -118,7 +118,7 @@ public class GetRequest extends SingleShardRequest<GetRequest> {
 
     @Override
     public ActionRequestValidationException validate() {
-        ActionRequestValidationException validationException = super.validate();
+        ActionRequestValidationException validationException = super.validateNonNullIndex();
         if (type == null) {
             validationException = ValidateActions.addValidationError("type is missing", validationException);
         }

core/src/main/java/org/elasticsearch/action/get/MultiGetShardRequest.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.action.get;
 
 import com.carrotsearch.hppc.IntArrayList;
+import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.support.single.shard.SingleShardRequest;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
@@ -54,6 +55,11 @@ public class MultiGetShardRequest extends SingleShardRequest<MultiGetShardReques
         ignoreErrorsOnGeneratedFields = multiGetRequest.ignoreErrorsOnGeneratedFields;
     }
 
+    @Override
+    public ActionRequestValidationException validate() {
+        return super.validateNonNullIndex();
+    }
+
     public int shardId() {
         return this.shardId;
     }

core/src/main/java/org/elasticsearch/action/get/TransportGetAction.java

@@ -58,7 +58,7 @@ public class TransportGetAction extends TransportSingleShardAction<GetRequest, G
     }
 
     @Override
-    protected boolean resolveIndex() {
+    protected boolean resolveIndex(GetRequest request) {
         return true;
     }
 

core/src/main/java/org/elasticsearch/action/get/TransportShardMultiGetAction.java

@@ -20,7 +20,6 @@
 package org.elasticsearch.action.get;
 
 import org.elasticsearch.ElasticsearchException;
-import org.elasticsearch.ExceptionsHelper;
 import org.elasticsearch.action.support.ActionFilters;
 import org.elasticsearch.action.support.TransportActions;
 import org.elasticsearch.action.support.single.shard.TransportSingleShardAction;
@@ -68,7 +67,7 @@ public class TransportShardMultiGetAction extends TransportSingleShardAction<Mul
     }
 
     @Override
-    protected boolean resolveIndex() {
+    protected boolean resolveIndex(MultiGetShardRequest request) {
         return true;
     }
 

core/src/main/java/org/elasticsearch/action/percolate/TransportShardMultiPercolateAction.java

@@ -21,6 +21,7 @@ package org.elasticsearch.action.percolate;
 
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.ExceptionsHelper;
+import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.ActionResponse;
 import org.elasticsearch.action.IndicesRequest;
 import org.elasticsearch.action.OriginalIndices;
@@ -76,7 +77,7 @@ public class TransportShardMultiPercolateAction extends TransportSingleShardActi
     }
 
     @Override
-    protected boolean resolveIndex() {
+    protected boolean resolveIndex(Request request) {
         return false;
     }
 
@@ -127,6 +128,11 @@ public class TransportShardMultiPercolateAction extends TransportSingleShardActi
             this.items = new ArrayList<>();
         }
 
+        @Override
+        public ActionRequestValidationException validate() {
+            return super.validateNonNullIndex();
+        }
+
         @Override
         public String[] indices() {
             List<String> indices = new ArrayList<>();

core/src/main/java/org/elasticsearch/action/support/single/custom/SingleCustomOperationRequest.java

@@ -1,142 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.elasticsearch.action.support.single.custom;
-
-import org.elasticsearch.action.ActionRequest;
-import org.elasticsearch.action.ActionRequestValidationException;
-import org.elasticsearch.action.IndicesRequest;
-import org.elasticsearch.action.support.IndicesOptions;
-import org.elasticsearch.common.Strings;
-import org.elasticsearch.common.io.stream.StreamInput;
-import org.elasticsearch.common.io.stream.StreamOutput;
-import org.elasticsearch.index.shard.ShardId;
-
-import java.io.IOException;
-
-/**
- *
- */
-public abstract class SingleCustomOperationRequest<T extends SingleCustomOperationRequest> extends ActionRequest<T> implements IndicesRequest {
-
-    ShardId internalShardId;
-
-    private boolean threadedOperation = true;
-    private boolean preferLocal = true;
-    private String index;
-
-    protected SingleCustomOperationRequest() {
-    }
-
-    protected SingleCustomOperationRequest(ActionRequest request) {
-        super(request);
-    }
-
-    @Override
-    public ActionRequestValidationException validate() {
-        return null;
-    }
-
-    /**
-     * Controls if the operation will be executed on a separate thread when executed locally.
-     */
-    public boolean operationThreaded() {
-        return threadedOperation;
-    }
-
-    /**
-     * Controls if the operation will be executed on a separate thread when executed locally.
-     */
-    @SuppressWarnings("unchecked")
-    public final T operationThreaded(boolean threadedOperation) {
-        this.threadedOperation = threadedOperation;
-        return (T) this;
-    }
-
-    /**
-     * if this operation hits a node with a local relevant shard, should it be preferred
-     * to be executed on, or just do plain round robin. Defaults to <tt>true</tt>
-     */
-    @SuppressWarnings("unchecked")
-    public final T preferLocal(boolean preferLocal) {
-        this.preferLocal = preferLocal;
-        return (T) this;
-    }
-
-    @SuppressWarnings("unchecked")
-    public T index(String index) {
-        this.index = index;
-        return (T)this;
-    }
-
-    public String index() {
-        return index;
-    }
-
-    @Override
-    public IndicesOptions indicesOptions() {
-        return IndicesOptions.strictSingleIndexNoExpandForbidClosed();
-    }
-
-    @Override
-    public String[] indices() {
-        if (index == null) {
-            return Strings.EMPTY_ARRAY;
-        }
-        return new String[]{index};
-    }
-
-    /**
-     * if this operation hits a node with a local relevant shard, should it be preferred
-     * to be executed on, or just do plain round robin. Defaults to <tt>true</tt>
-     */
-    public boolean preferLocalShard() {
-        return this.preferLocal;
-    }
-
-    public void beforeLocalFork() {
-
-    }
-
-    @Override
-    public void readFrom(StreamInput in) throws IOException {
-        super.readFrom(in);
-        if (in.readBoolean()) {
-            internalShardId = ShardId.readShardId(in);
-        }
-        preferLocal = in.readBoolean();
-        readIndex(in);
-    }
-
-    protected void readIndex(StreamInput in) throws IOException {
-        index = in.readOptionalString();
-    }
-
-    @Override
-    public void writeTo(StreamOutput out) throws IOException {
-        super.writeTo(out);
-        out.writeOptionalStreamable(internalShardId);
-        out.writeBoolean(preferLocal);
-        writeIndex(out);
-    }
-
-    protected void writeIndex(StreamOutput out) throws IOException {
-        out.writeOptionalString(index);
-    }
-}
-

core/src/main/java/org/elasticsearch/action/support/single/custom/SingleCustomOperationRequestBuilder.java

@@ -1,56 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.elasticsearch.action.support.single.custom;
-
-import org.elasticsearch.action.Action;
-import org.elasticsearch.action.ActionRequestBuilder;
-import org.elasticsearch.action.ActionResponse;
-import org.elasticsearch.client.Client;
-import org.elasticsearch.client.ElasticsearchClient;
-import org.elasticsearch.client.IndicesAdminClient;
-
-/**
- */
-public abstract class SingleCustomOperationRequestBuilder<Request extends SingleCustomOperationRequest<Request>, Response extends ActionResponse, RequestBuilder extends SingleCustomOperationRequestBuilder<Request, Response, RequestBuilder>>
-        extends ActionRequestBuilder<Request, Response, RequestBuilder> {
-
-
-    protected SingleCustomOperationRequestBuilder(ElasticsearchClient client, Action<Request, Response, RequestBuilder> action, Request request) {
-        super(client, action, request);
-    }
-
-    /**
-     * Controls if the operation will be executed on a separate thread when executed locally.
-     */
-    @SuppressWarnings("unchecked")
-    public final RequestBuilder setOperationThreaded(boolean threadedOperation) {
-        request.operationThreaded(threadedOperation);
-        return (RequestBuilder) this;
-    }
-
-    /**
-     * if this operation hits a node with a local relevant shard, should it be preferred
-     * to be executed on, or just do plain round robin. Defaults to <tt>true</tt>
-     */
-    @SuppressWarnings("unchecked")
-    public final RequestBuilder setPreferLocal(boolean preferLocal) {
-        request.preferLocal(preferLocal);
-        return (RequestBuilder) this;
-    }
-}

core/src/main/java/org/elasticsearch/action/support/single/custom/TransportSingleCustomOperationAction.java

@@ -1,314 +0,0 @@
-/*
- * Licensed to Elasticsearch under one or more contributor
- * license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright
- * ownership. Elasticsearch licenses this file to you under
- * the Apache License, Version 2.0 (the "License"); you may
- * not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *    http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing,
- * software distributed under the License is distributed on an
- * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
- * KIND, either express or implied.  See the License for the
- * specific language governing permissions and limitations
- * under the License.
- */
-package org.elasticsearch.action.support.single.custom;
-
-import org.elasticsearch.action.ActionListener;
-import org.elasticsearch.action.ActionResponse;
-import org.elasticsearch.action.NoShardAvailableActionException;
-import org.elasticsearch.action.support.ActionFilters;
-import org.elasticsearch.action.support.HandledTransportAction;
-import org.elasticsearch.cluster.ClusterService;
-import org.elasticsearch.cluster.ClusterState;
-import org.elasticsearch.cluster.block.ClusterBlockException;
-import org.elasticsearch.cluster.block.ClusterBlockLevel;
-import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.node.DiscoveryNode;
-import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.ShardRouting;
-import org.elasticsearch.cluster.routing.ShardsIterator;
-import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.index.shard.ShardId;
-import org.elasticsearch.threadpool.ThreadPool;
-import org.elasticsearch.transport.*;
-
-/**
- * Transport action used to send a read request to one of the shards that belong to an index.
- * Supports retrying another shard in case of failure.
- */
-public abstract class TransportSingleCustomOperationAction<Request extends SingleCustomOperationRequest, Response extends ActionResponse> extends HandledTransportAction<Request, Response> {
-
-    protected final ClusterService clusterService;
-    protected final TransportService transportService;
-
-    final String transportShardAction;
-    final String executor;
-
-    protected TransportSingleCustomOperationAction(Settings settings, String actionName, ThreadPool threadPool,
-                                                   ClusterService clusterService, TransportService transportService,
-                                                   ActionFilters actionFilters, IndexNameExpressionResolver indexNameExpressionResolver,
-                                                   Class<Request> request, String executor) {
-        super(settings, actionName, threadPool, transportService, actionFilters, indexNameExpressionResolver, request);
-        this.clusterService = clusterService;
-        this.transportService = transportService;
-
-        this.transportShardAction = actionName + "[s]";
-        this.executor = executor;
-
-        transportService.registerRequestHandler(transportShardAction, request, executor, new ShardTransportHandler());
-    }
-
-    @Override
-    protected void doExecute(Request request, ActionListener<Response> listener) {
-        new AsyncSingleAction(request, listener).start();
-    }
-
-    /**
-     * Can return null to execute on this local node.
-     */
-    protected abstract ShardsIterator shards(ClusterState state, InternalRequest request);
-
-    /**
-     * Operation to be executed at the shard level. Can be called with shardId set to null, meaning that there is no
-     * shard involved and the operation just needs to be executed on the local node.
-     */
-    protected abstract Response shardOperation(Request request, ShardId shardId);
-
-    protected abstract Response newResponse();
-
-    protected ClusterBlockException checkGlobalBlock(ClusterState state) {
-        return state.blocks().globalBlockedException(ClusterBlockLevel.READ);
-    }
-
-    protected ClusterBlockException checkRequestBlock(ClusterState state, InternalRequest request) {
-        return state.blocks().indexBlockedException(ClusterBlockLevel.READ, request.concreteIndex());
-    }
-
-    protected abstract boolean resolveIndex(Request request);
-
-    private class AsyncSingleAction {
-
-        private final ActionListener<Response> listener;
-
-        private final ShardsIterator shardsIt;
-
-        private final InternalRequest internalRequest;
-
-        private final DiscoveryNodes nodes;
-
-        private AsyncSingleAction(Request request, ActionListener<Response> listener) {
-            this.listener = listener;
-
-            ClusterState clusterState = clusterService.state();
-            nodes = clusterState.nodes();
-            ClusterBlockException blockException = checkGlobalBlock(clusterState);
-            if (blockException != null) {
-                throw blockException;
-            }
-
-            String concreteSingleIndex;
-            if (resolveIndex(request)) {
-                concreteSingleIndex = indexNameExpressionResolver.concreteSingleIndex(clusterState, request);
-            } else {
-                concreteSingleIndex = request.index();
-            }
-            this.internalRequest = new InternalRequest(request, concreteSingleIndex);
-
-            blockException = checkRequestBlock(clusterState, internalRequest);
-            if (blockException != null) {
-                throw blockException;
-            }
-            this.shardsIt = shards(clusterState, internalRequest);
-        }
-
-        public void start() {
-            performFirst();
-        }
-
-        private void onFailure(ShardRouting shardRouting, Throwable e) {
-            if (logger.isTraceEnabled() && e != null) {
-                logger.trace(shardRouting.shortSummary() + ": Failed to execute [" + internalRequest.request() + "]", e);
-            }
-            perform(e);
-        }
-
-        /**
-         * First get should try and use a shard that exists on a local node for better performance
-         */
-        private void performFirst() {
-            if (shardsIt == null) {
-                // just execute it on the local node
-                if (internalRequest.request().operationThreaded()) {
-                    internalRequest.request().beforeLocalFork();
-                    threadPool.executor(executor).execute(new Runnable() {
-                        @Override
-                        public void run() {
-                            try {
-                                Response response = shardOperation(internalRequest.request(), null);
-                                listener.onResponse(response);
-                            } catch (Throwable e) {
-                                onFailure(null, e);
-                            }
-                        }
-                    });
-                    return;
-                } else {
-                    try {
-                        final Response response = shardOperation(internalRequest.request(), null);
-                        listener.onResponse(response);
-                        return;
-                    } catch (Throwable e) {
-                        onFailure(null, e);
-                    }
-                }
-                return;
-            }
-
-            if (internalRequest.request().preferLocalShard()) {
-                boolean foundLocal = false;
-                ShardRouting shardX;
-                while ((shardX = shardsIt.nextOrNull()) != null) {
-                    final ShardRouting shard = shardX;
-                    if (shard.currentNodeId().equals(nodes.localNodeId())) {
-                        foundLocal = true;
-                        if (internalRequest.request().operationThreaded()) {
-                            internalRequest.request().beforeLocalFork();
-                            threadPool.executor(executor).execute(new Runnable() {
-                                @Override
-                                public void run() {
-                                    try {
-                                        Response response = shardOperation(internalRequest.request(), shard.shardId());
-                                        listener.onResponse(response);
-                                    } catch (Throwable e) {
-                                        shardsIt.reset();
-                                        onFailure(shard, e);
-                                    }
-                                }
-                            });
-                            return;
-                        } else {
-                            try {
-                                final Response response = shardOperation(internalRequest.request(), shard.shardId());
-                                listener.onResponse(response);
-                                return;
-                            } catch (Throwable e) {
-                                shardsIt.reset();
-                                onFailure(shard, e);
-                            }
-                        }
-                    }
-                }
-                if (!foundLocal) {
-                    // no local node get, go remote
-                    shardsIt.reset();
-                    perform(null);
-                }
-            } else {
-                perform(null);
-            }
-        }
-
-        private void perform(final Throwable lastException) {
-            final ShardRouting shard = shardsIt == null ? null : shardsIt.nextOrNull();
-            if (shard == null) {
-                Throwable failure = lastException;
-                if (failure == null) {
-                    failure = new NoShardAvailableActionException(null, "No shard available for [" + internalRequest.request() + "]");
-                } else {
-                    if (logger.isDebugEnabled()) {
-                        logger.debug("failed to execute [" + internalRequest.request() + "]", failure);
-                    }
-                }
-                listener.onFailure(failure);
-            } else {
-                if (shard.currentNodeId().equals(nodes.localNodeId())) {
-                    // we don't prefer local shard, so try and do it here
-                    if (!internalRequest.request().preferLocalShard()) {
-                        try {
-                            if (internalRequest.request().operationThreaded()) {
-                                internalRequest.request().beforeLocalFork();
-                                threadPool.executor(executor).execute(new Runnable() {
-                                    @Override
-                                    public void run() {
-                                        try {
-                                            Response response = shardOperation(internalRequest.request(), shard.shardId());
-                                            listener.onResponse(response);
-                                        } catch (Throwable e) {
-                                            onFailure(shard, e);
-                                        }
-                                    }
-                                });
-                            } else {
-                                final Response response = shardOperation(internalRequest.request(), shard.shardId());
-                                listener.onResponse(response);
-                            }
-                        } catch (Throwable e) {
-                            onFailure(shard, e);
-                        }
-                    } else {
-                        perform(lastException);
-                    }
-                } else {
-                    DiscoveryNode node = nodes.get(shard.currentNodeId());
-                    internalRequest.request().internalShardId = shard.shardId();
-                    transportService.sendRequest(node, transportShardAction, internalRequest.request(), new BaseTransportResponseHandler<Response>() {
-                        @Override
-                        public Response newInstance() {
-                            return newResponse();
-                        }
-
-                        @Override
-                        public String executor() {
-                            return ThreadPool.Names.SAME;
-                        }
-
-                        @Override
-                        public void handleResponse(final Response response) {
-                            listener.onResponse(response);
-                        }
-
-                        @Override
-                        public void handleException(TransportException exp) {
-                            onFailure(shard, exp);
-                        }
-                    });
-                }
-            }
-        }
-    }
-
-    private class ShardTransportHandler implements TransportRequestHandler<Request> {
-
-        @Override
-        public void messageReceived(final Request request, final TransportChannel channel) throws Exception {
-            Response response = shardOperation(request, request.internalShardId);
-            channel.sendResponse(response);
-        }
-    }
-
-    /**
-     * Internal request class that gets built on each node. Holds the original request plus additional info.
-     */
-    protected class InternalRequest {
-        final Request request;
-        final String concreteIndex;
-
-        InternalRequest(Request request, String concreteIndex) {
-            this.request = request;
-            this.concreteIndex = concreteIndex;
-        }
-
-        public Request request() {
-            return request;
-        }
-
-        public String concreteIndex() {
-            return concreteIndex;
-        }
-    }
-}

core/src/main/java/org/elasticsearch/action/support/single/shard/SingleShardRequest.java

@@ -24,6 +24,7 @@ import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.IndicesRequest;
 import org.elasticsearch.action.ValidateActions;
 import org.elasticsearch.action.support.IndicesOptions;
+import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.index.shard.ShardId;
@@ -35,10 +36,17 @@ import java.io.IOException;
  */
 public abstract class SingleShardRequest<T extends SingleShardRequest> extends ActionRequest<T> implements IndicesRequest {
 
-    ShardId internalShardId;
-
-    protected String index;
     public static final IndicesOptions INDICES_OPTIONS = IndicesOptions.strictSingleIndexNoExpandForbidClosed();
+
+    /**
+     * The concrete index name
+     *
+     * Whether index property is optional depends on the concrete implementation. If index property is required the
+     * concrete implementation should use {@link #validateNonNullIndex()} to check if the index property has been set
+     */
+    @Nullable
+    protected String index;
+    ShardId internalShardId;
     private boolean threadedOperation = true;
 
     protected SingleShardRequest() {
@@ -57,8 +65,10 @@ public abstract class SingleShardRequest<T extends SingleShardRequest> extends A
         this.index = index;
     }
 
-    @Override
-    public ActionRequestValidationException validate() {
+    /**
+     * @return a validation exception if the index property hasn't been set
+     */
+    protected ActionRequestValidationException validateNonNullIndex() {
         ActionRequestValidationException validationException = null;
         if (index == null) {
             validationException = ValidateActions.addValidationError("index is missing", validationException);
@@ -66,6 +76,13 @@ public abstract class SingleShardRequest<T extends SingleShardRequest> extends A
         return validationException;
     }
 
+    /**
+     * @return The concrete index this request is targeted for or <code>null</code> if index is optional.
+     *         Whether index property is optional depends on the concrete implementation. If index property
+     *         is required the concrete implementation should use {@link #validateNonNullIndex()} to check
+     *         if the index property has been set
+     */
+    @Nullable
     public String index() {
         return index;
     }
@@ -111,7 +128,7 @@ public abstract class SingleShardRequest<T extends SingleShardRequest> extends A
         if (in.readBoolean()) {
             internalShardId = ShardId.readShardId(in);
         }
-        index = in.readString();
+        index = in.readOptionalString();
         // no need to pass threading over the network, they are always false when coming throw a thread pool
     }
 
@@ -119,7 +136,7 @@ public abstract class SingleShardRequest<T extends SingleShardRequest> extends A
     public void writeTo(StreamOutput out) throws IOException {
         super.writeTo(out);
         out.writeOptionalStreamable(internalShardId);
-        out.writeString(index);
+        out.writeOptionalString(index);
     }
 
 }

core/src/main/java/org/elasticsearch/action/support/single/shard/TransportSingleShardAction.java

@@ -32,9 +32,10 @@ import org.elasticsearch.cluster.block.ClusterBlockLevel;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.node.DiscoveryNodes;
-import org.elasticsearch.cluster.routing.ShardIterator;
 import org.elasticsearch.cluster.routing.ShardRouting;
+import org.elasticsearch.cluster.routing.ShardsIterator;
 import org.elasticsearch.common.Nullable;
+import org.elasticsearch.common.logging.support.LoggerMessageFormat;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.threadpool.ThreadPool;
@@ -43,7 +44,9 @@ import org.elasticsearch.transport.*;
 import static org.elasticsearch.action.support.TransportActions.isShardNotAvailableException;
 
 /**
- * A base class for single shard read operations.
+ * A base class for operations that need to perform a read operation on a single shard copy. If the operation fails,
+ * the read operation can be performed on other shard copies. Concrete implementations can provide their own list
+ * of candidate shards to try the read operation on.
  */
 public abstract class TransportSingleShardAction<Request extends SingleShardRequest, Response extends ActionResponse> extends TransportAction<Request, Response> {
 
@@ -88,7 +91,7 @@ public abstract class TransportSingleShardAction<Request extends SingleShardRequ
 
     protected abstract Response newResponse();
 
-    protected abstract boolean resolveIndex();
+    protected abstract boolean resolveIndex(Request request);
 
     protected ClusterBlockException checkGlobalBlock(ClusterState state) {
         return state.blocks().globalBlockedException(ClusterBlockLevel.READ);
@@ -102,12 +105,17 @@ public abstract class TransportSingleShardAction<Request extends SingleShardRequ
 
     }
 
-    protected abstract ShardIterator shards(ClusterState state, InternalRequest request);
+    /**
+     * Returns the candidate shards to execute the operation on or <code>null</code> the execute
+     * the operation locally (the node that received the request)
+     */
+    @Nullable
+    protected abstract ShardsIterator shards(ClusterState state, InternalRequest request);
 
     class AsyncSingleAction {
 
         private final ActionListener<Response> listener;
-        private final ShardIterator shardIt;
+        private final ShardsIterator shardIt;
         private final InternalRequest internalRequest;
         private final DiscoveryNodes nodes;
         private volatile Throwable lastFailure;
@@ -126,7 +134,7 @@ public abstract class TransportSingleShardAction<Request extends SingleShardRequ
             }
 
             String concreteSingleIndex;
-            if (resolveIndex()) {
+            if (resolveIndex(request)) {
                 concreteSingleIndex = indexNameExpressionResolver.concreteSingleIndex(clusterState, request);
             } else {
                 concreteSingleIndex = request.index();
@@ -143,7 +151,32 @@ public abstract class TransportSingleShardAction<Request extends SingleShardRequ
         }
 
         public void start() {
-            perform(null);
+            if (shardIt == null) {
+                // just execute it on the local node
+                transportService.sendRequest(clusterService.localNode(), transportShardAction, internalRequest.request(), new BaseTransportResponseHandler<Response>() {
+                    @Override
+                    public Response newInstance() {
+                        return newResponse();
+                    }
+
+                    @Override
+                    public String executor() {
+                        return ThreadPool.Names.SAME;
+                    }
+
+                    @Override
+                    public void handleResponse(final Response response) {
+                        listener.onResponse(response);
+                    }
+
+                    @Override
+                    public void handleException(TransportException exp) {
+                        perform(exp);
+                    }
+                });
+            } else {
+                perform(null);
+            }
         }
 
         private void onFailure(ShardRouting shardRouting, Throwable e) {
@@ -163,10 +196,10 @@ public abstract class TransportSingleShardAction<Request extends SingleShardRequ
             if (shardRouting == null) {
                 Throwable failure = lastFailure;
                 if (failure == null || isShardNotAvailableException(failure)) {
-                    failure = new NoShardAvailableActionException(shardIt.shardId(), null, failure);
+                    failure = new NoShardAvailableActionException(null, LoggerMessageFormat.format("No shard available for [{}]", internalRequest.request()), failure);
                 } else {
                     if (logger.isDebugEnabled()) {
-                        logger.debug("{}: failed to execute [{}]", failure, shardIt.shardId(), internalRequest.request());
+                        logger.debug("{}: failed to execute [{}]", failure, null, internalRequest.request());
                     }
                 }
                 listener.onFailure(failure);
@@ -174,7 +207,7 @@ public abstract class TransportSingleShardAction<Request extends SingleShardRequ
             }
             DiscoveryNode node = nodes.get(shardRouting.currentNodeId());
             if (node == null) {
-                onFailure(shardRouting, new NoShardAvailableActionException(shardIt.shardId()));
+                onFailure(shardRouting, new NoShardAvailableActionException(shardRouting.shardId()));
             } else {
                 internalRequest.request().internalShardId = shardRouting.shardId();
                 transportService.sendRequest(node, transportShardAction, internalRequest.request(), new BaseTransportResponseHandler<Response>() {

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

@@ -20,6 +20,7 @@
 package org.elasticsearch.action.termvectors;
 
 import com.carrotsearch.hppc.IntArrayList;
+import org.elasticsearch.action.ActionRequestValidationException;
 import org.elasticsearch.action.support.single.shard.SingleShardRequest;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
@@ -47,6 +48,11 @@ public class MultiTermVectorsShardRequest extends SingleShardRequest<MultiTermVe
         requests = new ArrayList<>();
     }
 
+    @Override
+    public ActionRequestValidationException validate() {
+        return super.validateNonNullIndex();
+    }
+
     public int shardId() {
         return this.shardId;
     }

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

@@ -167,6 +167,7 @@ public class TermVectorsRequest extends SingleShardRequest<TermVectorsRequest> i
         this.version = other.version();
         this.versionType = VersionType.fromValue(other.versionType().getValue());
         this.startTime = other.startTime();
+        this.filterSettings = other.filterSettings();
     }
 
     public TermVectorsRequest(MultiGetRequest.Item item) {
@@ -472,7 +473,7 @@ public class TermVectorsRequest extends SingleShardRequest<TermVectorsRequest> i
 
     @Override
     public ActionRequestValidationException validate() {
-        ActionRequestValidationException validationException = super.validate();
+        ActionRequestValidationException validationException = super.validateNonNullIndex();
         if (type == null) {
             validationException = ValidateActions.addValidationError("type is missing", validationException);
         }

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

@@ -63,7 +63,7 @@ public class TransportShardMultiTermsVectorAction extends TransportSingleShardAc
     }
 
     @Override
-    protected boolean resolveIndex() {
+    protected boolean resolveIndex(MultiTermVectorsShardRequest request) {
         return false;
     }
 

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

@@ -65,7 +65,7 @@ public class TransportTermVectorsAction extends TransportSingleShardAction<TermV
     }
 
     @Override
-    protected boolean resolveIndex() {
+    protected boolean resolveIndex(TermVectorsRequest request) {
         return true;
     }
 

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

@@ -136,21 +136,9 @@ public class JarHell {
     /** inspect manifest for sure incompatibilities */
     static void checkManifest(Manifest manifest, Path jar) {
         // give a nice error if jar requires a newer java version
-        String systemVersion = System.getProperty("java.specification.version");
         String targetVersion = manifest.getMainAttributes().getValue("X-Compile-Target-JDK");
         if (targetVersion != null) {
-            float current = Float.POSITIVE_INFINITY;
-            float target = Float.NEGATIVE_INFINITY;
-            try {
-                current = Float.parseFloat(systemVersion);
-                target = Float.parseFloat(targetVersion);
-            } catch (NumberFormatException e) {
-                // some spec changed, time for a more complex parser
-            }
-            if (current < target) {
-                throw new IllegalStateException(jar + " requires Java " + targetVersion
-                        + ", your system: " + systemVersion);
-            }
+            checkJavaVersion(jar.toString(), targetVersion);
         }
 
         // give a nice error if jar is compiled against different es version
@@ -162,6 +150,26 @@ public class JarHell {
         }
     }
 
+    /**
+     * Checks that the java specification version {@code targetVersion}
+     * required by {@code resource} is compatible with the current installation.
+     */
+    public static void checkJavaVersion(String resource, String targetVersion) {
+        String systemVersion = System.getProperty("java.specification.version");
+        float current = Float.POSITIVE_INFINITY;
+        float target = Float.NEGATIVE_INFINITY;
+        try {
+            current = Float.parseFloat(systemVersion);
+            target = Float.parseFloat(targetVersion);
+        } catch (NumberFormatException e) {
+            // some spec changed, time for a more complex parser
+        }
+        if (current < target) {
+            throw new IllegalStateException(resource + " requires Java " + targetVersion
+                    + ", your system: " + systemVersion);
+        }
+    }
+
     static void checkClass(Map<String,Path> clazzes, String clazz, Path jarpath) {
         Path previous = clazzes.put(clazz, jarpath);
         if (previous != null) {

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

@@ -420,7 +420,10 @@ public class MetaDataCreateIndexService extends AbstractComponent {
                             .put(indexMetaData, false)
                             .build();
 
-                    logger.info("[{}] creating index, cause [{}], templates {}, shards [{}]/[{}], mappings {}", request.index(), request.cause(), templateNames, indexMetaData.numberOfShards(), indexMetaData.numberOfReplicas(), mappings.keySet());
+                    String maybeShadowIndicator = IndexMetaData.isIndexUsingShadowReplicas(indexMetaData.settings()) ? "s" : "";
+                    logger.info("[{}] creating index, cause [{}], templates {}, shards [{}]/[{}{}], mappings {}",
+                            request.index(), request.cause(), templateNames, indexMetaData.numberOfShards(),
+                            indexMetaData.numberOfReplicas(), maybeShadowIndicator, mappings.keySet());
 
                     ClusterBlocks.Builder blocks = ClusterBlocks.builder().blocks(currentState.blocks());
                     if (!request.blocks().isEmpty()) {

core/src/main/java/org/elasticsearch/cluster/routing/AllocationId.java

@@ -83,10 +83,10 @@ public class AllocationId implements ToXContent {
 
     /**
      * Creates a new allocation id representing a cancelled relocation.
-     *
+     * <p/>
      * Note that this is expected to be called on the allocation id
      * of the *source* shard
-     * */
+     */
     public static AllocationId cancelRelocation(AllocationId allocationId) {
         assert allocationId.getRelocationId() != null;
         return new AllocationId(allocationId.getId(), null);
@@ -94,7 +94,7 @@ public class AllocationId implements ToXContent {
 
     /**
      * Creates a new allocation id finalizing a relocation.
-     *
+     * <p/>
      * Note that this is expected to be called on the allocation id
      * of the *target* shard and thus it only needs to clear the relocating id.
      */
@@ -120,9 +120,16 @@ public class AllocationId implements ToXContent {
 
     @Override
     public boolean equals(Object o) {
-        if (this == o) return true;
+        if (this == o) {
+            return true;
+        }
+        if (o == null) {
+            return false;
+        }
         AllocationId that = (AllocationId) o;
-        if (!id.equals(that.id)) return false;
+        if (!id.equals(that.id)) {
+            return false;
+        }
         return !(relocationId != null ? !relocationId.equals(that.relocationId) : that.relocationId != null);
 
     }

core/src/main/java/org/elasticsearch/cluster/routing/RoutingNode.java

@@ -88,7 +88,7 @@ public class RoutingNode implements Iterable<ShardRouting> {
     void add(ShardRouting shard) {
         // TODO use Set with ShardIds for faster lookup.
         for (ShardRouting shardRouting : shards) {
-            if (shardRouting.shardId().equals(shard.shardId())) {
+            if (shardRouting.isSameShard(shard)) {
                 throw new IllegalStateException("Trying to add a shard [" + shard.shardId().index().name() + "][" + shard.shardId().id() + "] to a node [" + nodeId + "] where it already exists");
             }
         }

core/src/main/java/org/elasticsearch/cluster/routing/ShardRouting.java

@@ -420,7 +420,7 @@ public final class ShardRouting implements Streamable, ToXContent {
     void relocate(String relocatingNodeId) {
         ensureNotFrozen();
         version++;
-        assert state == ShardRoutingState.STARTED : this;
+        assert state == ShardRoutingState.STARTED : "current shard has to be started in order to be relocated " + this;
         state = ShardRoutingState.RELOCATING;
         this.relocatingNodeId = relocatingNodeId;
         this.allocationId = AllocationId.newRelocation(allocationId);
@@ -467,7 +467,7 @@ public final class ShardRouting implements Streamable, ToXContent {
         restoreSource = null;
         unassignedInfo = null; // we keep the unassigned data until the shard is started
         if (allocationId.getRelocationId() != null) {
-            // target relocation
+            // relocation target
             allocationId = AllocationId.finishRelocation(allocationId);
         }
         state = ShardRoutingState.STARTED;
@@ -498,6 +498,106 @@ public final class ShardRouting implements Streamable, ToXContent {
         primary = false;
     }
 
+    /** returns true if this routing has the same shardId as another */
+    public boolean isSameShard(ShardRouting other) {
+        return index.equals(other.index) && shardId == other.shardId;
+    }
+
+    /**
+     * returns true if this routing has the same allocation ID as another.
+     * <p/>
+     * Note: if both shard routing has a null as their {@link #allocationId()}, this method returns false as the routing describe
+     * no allocation at all..
+     **/
+    public boolean isSameAllocation(ShardRouting other) {
+        boolean b = this.allocationId != null && other.allocationId != null && this.allocationId.getId().equals(other.allocationId.getId());
+        assert b == false || this.currentNodeId.equals(other.currentNodeId) : "ShardRoutings have the same allocation id but not the same node. This [" + this + "], other [" + other + "]";
+        return b;
+    }
+
+    /** returns true if the routing is the relocation target of the given routing */
+    public boolean isRelocationTargetOf(ShardRouting other) {
+        boolean b = this.allocationId != null && other.allocationId != null && this.state == ShardRoutingState.INITIALIZING &&
+                this.allocationId.getId().equals(other.allocationId.getRelocationId());
+
+        assert b == false || other.state == ShardRoutingState.RELOCATING :
+                "ShardRouting is a relocation target but the source shard state isn't relocating. This [" + this + "], other [" + other + "]";
+
+
+        assert b == false || other.allocationId.getId().equals(this.allocationId.getRelocationId()) :
+                "ShardRouting is a relocation target but the source id isn't equal to source's allocationId.getRelocationId. This [" + this + "], other [" + other + "]";
+
+        assert b == false || other.currentNodeId().equals(this.relocatingNodeId) :
+                "ShardRouting is a relocation target but source current node id isn't equal to target relocating node. This [" + this + "], other [" + other + "]";
+
+        assert b == false || this.currentNodeId().equals(other.relocatingNodeId) :
+                "ShardRouting is a relocation target but current node id isn't equal to source relocating node. This [" + this + "], other [" + other + "]";
+
+        assert b == false || isSameShard(other) :
+                "ShardRouting is a relocation target but both routings are not of the same shard. This [" + this + "], other [" + other + "]";
+
+        assert b == false || this.primary == other.primary :
+                "ShardRouting is a relocation target but primary flag is different. This [" + this + "], target [" + other + "]";
+
+        return b;
+    }
+
+    /** returns true if the routing is the relocation source for the given routing */
+    public boolean isRelocationSourceOf(ShardRouting other) {
+        boolean b = this.allocationId != null && other.allocationId != null && other.state == ShardRoutingState.INITIALIZING &&
+                other.allocationId.getId().equals(this.allocationId.getRelocationId());
+
+        assert b == false || this.state == ShardRoutingState.RELOCATING :
+                "ShardRouting is a relocation source but shard state isn't relocating. This [" + this + "], other [" + other + "]";
+
+
+        assert b == false || this.allocationId.getId().equals(other.allocationId.getRelocationId()) :
+                "ShardRouting is a relocation source but the allocation id isn't equal to other.allocationId.getRelocationId. This [" + this + "], other [" + other + "]";
+
+        assert b == false || this.currentNodeId().equals(other.relocatingNodeId) :
+                "ShardRouting is a relocation source but current node isn't equal to other's relocating node. This [" + this + "], other [" + other + "]";
+
+        assert b == false || other.currentNodeId().equals(this.relocatingNodeId) :
+                "ShardRouting is a relocation source but relocating node isn't equal to other's current node. This [" + this + "], other [" + other + "]";
+
+        assert b == false || isSameShard(other) :
+                "ShardRouting is a relocation source but both routings are not of the same shard. This [" + this + "], target [" + other + "]";
+
+        assert b == false || this.primary == other.primary :
+                "ShardRouting is a relocation source but primary flag is different. This [" + this + "], target [" + other + "]";
+
+        return b;
+    }
+
+    /** returns true if the current routing is identical to the other routing in all but meta fields, i.e., version and unassigned info */
+    public boolean equalsIgnoringMetaData(ShardRouting other) {
+        if (primary != other.primary) {
+            return false;
+        }
+        if (shardId != other.shardId) {
+            return false;
+        }
+        if (currentNodeId != null ? !currentNodeId.equals(other.currentNodeId) : other.currentNodeId != null) {
+            return false;
+        }
+        if (index != null ? !index.equals(other.index) : other.index != null) {
+            return false;
+        }
+        if (relocatingNodeId != null ? !relocatingNodeId.equals(other.relocatingNodeId) : other.relocatingNodeId != null) {
+            return false;
+        }
+        if (allocationId != null ? !allocationId.equals(other.allocationId) : other.allocationId != null) {
+            return false;
+        }
+        if (state != other.state) {
+            return false;
+        }
+        if (restoreSource != null ? !restoreSource.equals(other.restoreSource) : other.restoreSource != null) {
+            return false;
+        }
+        return true;
+    }
+
     @Override
     public boolean equals(Object o) {
         if (this == o) {
@@ -508,32 +608,8 @@ public final class ShardRouting implements Streamable, ToXContent {
             return false;
         }
         ShardRouting that = (ShardRouting) o;
-
-        if (primary != that.primary) {
-            return false;
-        }
-        if (shardId != that.shardId) {
-            return false;
-        }
-        if (currentNodeId != null ? !currentNodeId.equals(that.currentNodeId) : that.currentNodeId != null) {
-            return false;
-        }
-        if (index != null ? !index.equals(that.index) : that.index != null) {
-            return false;
-        }
-        if (relocatingNodeId != null ? !relocatingNodeId.equals(that.relocatingNodeId) : that.relocatingNodeId != null) {
-            return false;
-        }
-        if (allocationId != null ? !allocationId.equals(that.allocationId) : that.allocationId != null) {
-            return false;
-        }
-        if (state != that.state) {
-            return false;
-        }
-        if (restoreSource != null ? !restoreSource.equals(that.restoreSource) : that.restoreSource != null) {
-            return false;
-        }
-        return true;
+        // TODO: add version + unassigned info check. see #12387
+        return equalsIgnoringMetaData(that);
     }
 
     private long hashVersion = version - 1;

core/src/main/java/org/elasticsearch/cluster/routing/UnassignedInfo.java

@@ -95,7 +95,11 @@ public class UnassignedInfo implements ToXContent, Writeable<UnassignedInfo> {
         /**
          * When a shard moves from started back to initializing, for example, during shadow replica
          */
-        REINITIALIZED;
+        REINITIALIZED,
+        /**
+         * A better replica location is identified and causes the existing replica allocation to be cancelled.
+         */
+        REALLOCATED_REPLICA;
     }
 
     private final Reason reason;

core/src/main/java/org/elasticsearch/cluster/routing/allocation/AllocationService.java

@@ -338,7 +338,7 @@ public class AllocationService extends AbstractComponent {
             }
 
             for (ShardRouting shard : currentRoutingNode) {
-                if (shard.allocationId().getId().equals(startedShard.allocationId().getId())) {
+                if (shard.isSameAllocation(startedShard)) {
                     if (shard.active()) {
                         logger.trace("{} shard is already started, ignoring (routing: {})", startedShard.shardId(), startedShard);
                     } else {
@@ -363,8 +363,7 @@ public class AllocationService extends AbstractComponent {
             if (sourceRoutingNode != null) {
                 while (sourceRoutingNode.hasNext()) {
                     ShardRouting shard = sourceRoutingNode.next();
-                    if (shard.allocationId().getId().equals(startedShard.allocationId().getRelocationId())) {
-                        assert shard.relocating() : "source shard for relocation is not marked as relocating. source " + shard + ", started target " + startedShard;
+                    if (shard.isRelocationSourceOf(startedShard)) {
                         dirty = true;
                         sourceRoutingNode.remove();
                         break;
@@ -397,7 +396,7 @@ public class AllocationService extends AbstractComponent {
         boolean matchedShard = false;
         while (matchedNode.hasNext()) {
             ShardRouting routing = matchedNode.next();
-            if (routing.allocationId().getId().equals(failedShard.allocationId().getId())) {
+            if (routing.isSameAllocation(failedShard)) {
                 matchedShard = true;
                 logger.debug("{} failed shard {} found in routingNodes, failing it ({})", failedShard.shardId(), failedShard, unassignedInfo.shortSummary());
                 break;
@@ -428,7 +427,7 @@ public class AllocationService extends AbstractComponent {
             RoutingNode relocatingFromNode = routingNodes.node(failedShard.relocatingNodeId());
             if (relocatingFromNode != null) {
                 for (ShardRouting shardRouting : relocatingFromNode) {
-                    if (shardRouting.allocationId().getId().equals(failedShard.allocationId().getRelocationId())) {
+                    if (shardRouting.isRelocationSourceOf(failedShard)) {
                         logger.trace("{}, resolved source to [{}]. canceling relocation ... ({})", failedShard.shardId(), shardRouting, unassignedInfo.shortSummary());
                         routingNodes.cancelRelocation(shardRouting);
                         break;
@@ -441,7 +440,7 @@ public class AllocationService extends AbstractComponent {
             // and the shard copy needs to be marked as unassigned
 
             if (failedShard.relocatingNodeId() != null) {
-                // handle relocation source shards.  we need to find the target initializing shard that is recovering from, and remove it...
+                // handle relocation source shards.  we need to find the target initializing shard that is recovering, and remove it...
                 assert failedShard.initializing() == false; // should have been dealt with and returned
                 assert failedShard.relocating();
 
@@ -449,10 +448,7 @@ public class AllocationService extends AbstractComponent {
                 if (initializingNode != null) {
                     while (initializingNode.hasNext()) {
                         ShardRouting shardRouting = initializingNode.next();
-                        if (shardRouting.allocationId().getId().equals(failedShard.allocationId().getRelocationId())) {
-                            assert shardRouting.initializing() : shardRouting;
-                            assert failedShard.allocationId().getId().equals(shardRouting.allocationId().getRelocationId())
-                                    : "found target shard's allocation relocation id is different than source";
+                        if (shardRouting.isRelocationTargetOf(failedShard)) {
                             logger.trace("{} is removed due to the failure of the source shard", shardRouting);
                             initializingNode.remove();
                         }

core/src/main/java/org/elasticsearch/cluster/routing/allocation/command/CancelAllocationCommand.java

@@ -177,7 +177,7 @@ public class CancelAllocationCommand implements AllocationCommand {
                     RoutingNode relocatingFromNode = allocation.routingNodes().node(shardRouting.relocatingNodeId());
                     if (relocatingFromNode != null) {
                         for (ShardRouting fromShardRouting : relocatingFromNode) {
-                            if (fromShardRouting.shardId().equals(shardRouting.shardId()) && fromShardRouting.state() == RELOCATING) {
+                            if (fromShardRouting.isSameShard(shardRouting) && fromShardRouting.state() == RELOCATING) {
                                 allocation.routingNodes().cancelRelocation(fromShardRouting);
                                 break;
                             }
@@ -201,7 +201,7 @@ public class CancelAllocationCommand implements AllocationCommand {
                     if (initializingNode != null) {
                         while (initializingNode.hasNext()) {
                             ShardRouting initializingShardRouting = initializingNode.next();
-                            if (initializingShardRouting.shardId().equals(shardRouting.shardId()) && initializingShardRouting.initializing()) {
+                            if (initializingShardRouting.isRelocationTargetOf(shardRouting)) {
                                 initializingNode.remove();
                             }
                         }

core/src/main/java/org/elasticsearch/cluster/routing/allocation/decider/ThrottlingAllocationDecider.java

@@ -38,7 +38,7 @@ import org.elasticsearch.node.settings.NodeSettingsService;
  * node. The default is <tt>4</tt></li>
  * <p/>
  * <li><tt>cluster.routing.allocation.node_concurrent_recoveries</tt> -
- * restricts the number of concurrent recovery operations on a single node. The
+ * restricts the number of total concurrent shards initializing on a single node. The
  * default is <tt>2</tt></li>
  * </ul>
  * <p/>
@@ -106,7 +106,7 @@ public class ThrottlingAllocationDecider extends AllocationDecider {
     public Decision canAllocate(RoutingNode node, RoutingAllocation allocation) {
         int currentRecoveries = 0;
         for (ShardRouting shard : node) {
-            if (shard.initializing() || shard.relocating()) {
+            if (shard.initializing()) {
                 currentRecoveries++;
             }
         }

core/src/main/java/org/elasticsearch/common/util/concurrent/KeyedLock.java

@@ -22,10 +22,7 @@ package org.elasticsearch.common.util.concurrent;
 
 import java.util.concurrent.ConcurrentMap;
 import java.util.concurrent.atomic.AtomicInteger;
-import java.util.concurrent.locks.Lock;
-import java.util.concurrent.locks.ReadWriteLock;
 import java.util.concurrent.locks.ReentrantLock;
-import java.util.concurrent.locks.ReentrantReadWriteLock;
 
 /**
  * This class manages locks. Locks can be accessed with an identifier and are
@@ -115,58 +112,4 @@ public class KeyedLock<T> {
         return !map.isEmpty();
     }
 
-    /**
-     * A {@link KeyedLock} that allows to acquire a global lock that guarantees
-     * exclusive access to the resource the KeyedLock is guarding.
-     */
-    public final static class GlobalLockable<T> extends KeyedLock<T> {
-
-
-        private final ReadWriteLock lock;
-
-        public GlobalLockable(boolean fair){
-            super(fair);
-            lock = new ReentrantReadWriteLock(fair);
-        }
-
-        public GlobalLockable() {
-            this(false);
-        }
-
-        @Override
-        public void acquire(T key) {
-            boolean success = false;
-            lock.readLock().lock();
-            try {
-                super.acquire(key);
-                success = true;
-            } finally {
-                if (!success) {
-                    lock.readLock().unlock();
-                }
-            }
-        }
-
-        @Override
-        public void release(T key) {
-            KeyLock keyLock = threadLocal.get();
-            if (keyLock == null) {
-                throw new IllegalStateException("Lock not acquired");
-            }
-            try {
-                release(key, keyLock);
-            } finally {
-                lock.readLock().unlock();
-            }
-        }
-
-        /**
-         * Returns a global lock guaranteeing exclusive access to the resource
-         * this KeyedLock is guarding.
-         */
-        public Lock globalLock() {
-            return lock.writeLock();
-        }
-    }
-
 }

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

@@ -126,6 +126,7 @@ public class GatewayAllocator extends AbstractComponent {
         }); // sort for priority ordering
 
         changed |= primaryShardAllocator.allocateUnassigned(allocation);
+        changed |= replicaShardAllocator.processExistingRecoveries(allocation);
         changed |= replicaShardAllocator.allocateUnassigned(allocation);
         return changed;
     }

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

@@ -25,11 +25,11 @@ import com.carrotsearch.hppc.cursors.ObjectCursor;
 import com.carrotsearch.hppc.cursors.ObjectLongCursor;
 import org.elasticsearch.cluster.ClusterChangedEvent;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
-import org.elasticsearch.cluster.metadata.MetaData;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.routing.RoutingNode;
 import org.elasticsearch.cluster.routing.RoutingNodes;
 import org.elasticsearch.cluster.routing.ShardRouting;
+import org.elasticsearch.cluster.routing.UnassignedInfo;
 import org.elasticsearch.cluster.routing.allocation.RoutingAllocation;
 import org.elasticsearch.cluster.routing.allocation.decider.Decision;
 import org.elasticsearch.common.Nullable;
@@ -40,7 +40,6 @@ import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.index.store.StoreFileMetaData;
 import org.elasticsearch.indices.store.TransportNodesListShardStoreMetaData;
 
-import java.util.Iterator;
 import java.util.Map;
 
 /**
@@ -51,6 +50,62 @@ public abstract class ReplicaShardAllocator extends AbstractComponent {
         super(settings);
     }
 
+    /**
+     * Process existing recoveries of replicas and see if we need to cancel them if we find a better
+     * match. Today, a better match is one that has full sync id match compared to not having one in
+     * the previous recovery.
+     */
+    public boolean processExistingRecoveries(RoutingAllocation allocation) {
+        boolean changed = false;
+        for (RoutingNodes.RoutingNodesIterator nodes = allocation.routingNodes().nodes(); nodes.hasNext(); ) {
+            nodes.next();
+            for (RoutingNodes.RoutingNodeIterator it = nodes.nodeShards(); it.hasNext(); ) {
+                ShardRouting shard = it.next();
+                if (shard.primary() == true) {
+                    continue;
+                }
+                if (shard.initializing() == false) {
+                    continue;
+                }
+                if (shard.relocatingNodeId() != null) {
+                    continue;
+                }
+
+                AsyncShardFetch.FetchResult<TransportNodesListShardStoreMetaData.NodeStoreFilesMetaData> shardStores = fetchData(shard, allocation);
+                if (shardStores.hasData() == false) {
+                    logger.trace("{}: fetching new stores for initializing shard", shard);
+                    continue; // still fetching
+                }
+
+                ShardRouting primaryShard = allocation.routingNodes().activePrimary(shard);
+                assert primaryShard != null : "the replica shard can be allocated on at least one node, so there must be an active primary";
+                TransportNodesListShardStoreMetaData.StoreFilesMetaData primaryStore = findStore(primaryShard, allocation, shardStores);
+                if (primaryStore == null || primaryStore.allocated() == false) {
+                    // if we can't find the primary data, it is probably because the primary shard is corrupted (and listing failed)
+                    // just let the recovery find it out, no need to do anything about it for the initializing shard
+                    logger.trace("{}: no primary shard store found or allocated, letting actual allocation figure it out", shard);
+                    continue;
+                }
+
+                MatchingNodes matchingNodes = findMatchingNodes(shard, allocation, primaryStore, shardStores);
+                if (matchingNodes.getNodeWithHighestMatch() != null) {
+                    DiscoveryNode currentNode = allocation.nodes().get(shard.currentNodeId());
+                    DiscoveryNode nodeWithHighestMatch = matchingNodes.getNodeWithHighestMatch();
+                    if (currentNode.equals(nodeWithHighestMatch) == false
+                            && matchingNodes.isNodeMatchBySyncID(currentNode) == false
+                            && 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
+                        it.moveToUnassigned(new UnassignedInfo(UnassignedInfo.Reason.REALLOCATED_REPLICA,
+                                "existing allocation of replica to [" + currentNode + "] cancelled, sync id match found on node [" + nodeWithHighestMatch + "]"));
+                        changed = true;
+                    }
+                }
+            }
+        }
+        return changed;
+    }
+
     public boolean allocateUnassigned(RoutingAllocation allocation) {
         boolean changed = false;
         final RoutingNodes routingNodes = allocation.routingNodes();
@@ -236,7 +291,7 @@ public abstract class ReplicaShardAllocator extends AbstractComponent {
                     highestMatchNode = cursor.key;
                 }
             }
-            nodeWithHighestMatch = highestMatchNode;
+            this.nodeWithHighestMatch = highestMatchNode;
         }
 
         /**
@@ -248,6 +303,10 @@ public abstract class ReplicaShardAllocator extends AbstractComponent {
             return this.nodeWithHighestMatch;
         }
 
+        public boolean isNodeMatchBySyncID(DiscoveryNode node) {
+            return nodesToSize.get(node) == Long.MAX_VALUE;
+        }
+
         /**
          * Did we manage to find any data, regardless how well they matched or not.
          */

core/src/main/java/org/elasticsearch/index/engine/Engine.java

@@ -20,7 +20,6 @@
 package org.elasticsearch.index.engine;
 
 import com.google.common.base.Preconditions;
-
 import org.apache.lucene.index.*;
 import org.apache.lucene.search.IndexSearcher;
 import org.apache.lucene.search.Query;
@@ -45,7 +44,6 @@ import org.elasticsearch.common.util.concurrent.ReleasableLock;
 import org.elasticsearch.index.VersionType;
 import org.elasticsearch.index.deletionpolicy.SnapshotDeletionPolicy;
 import org.elasticsearch.index.deletionpolicy.SnapshotIndexCommit;
-import org.elasticsearch.index.mapper.DocumentMapper;
 import org.elasticsearch.index.mapper.ParseContext.Document;
 import org.elasticsearch.index.mapper.ParsedDocument;
 import org.elasticsearch.index.mapper.Uid;
@@ -57,11 +55,7 @@ import org.elasticsearch.index.translog.Translog;
 
 import java.io.Closeable;
 import java.io.IOException;
-import java.util.Arrays;
-import java.util.Comparator;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.locks.Condition;
@@ -288,7 +282,7 @@ public abstract class Engine implements Closeable {
             try {
                 final Searcher retVal = newSearcher(source, searcher, manager);
                 success = true;
-                return retVal;
+                return config().getWrappingService().wrap(engineConfig, retVal);
             } finally {
                 if (!success) {
                     manager.release(searcher);

core/src/main/java/org/elasticsearch/index/engine/EngineConfig.java

@@ -22,7 +22,6 @@ import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.codecs.Codec;
 import org.apache.lucene.index.IndexWriterConfig;
 import org.apache.lucene.index.MergePolicy;
-import org.elasticsearch.index.shard.MergeSchedulerConfig;
 import org.apache.lucene.search.QueryCache;
 import org.apache.lucene.search.QueryCachingPolicy;
 import org.apache.lucene.search.similarities.Similarity;
@@ -35,6 +34,7 @@ import org.elasticsearch.common.util.concurrent.EsExecutors;
 import org.elasticsearch.index.codec.CodecService;
 import org.elasticsearch.index.deletionpolicy.SnapshotDeletionPolicy;
 import org.elasticsearch.index.indexing.ShardIndexingService;
+import org.elasticsearch.index.shard.MergeSchedulerConfig;
 import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.index.shard.TranslogRecoveryPerformer;
 import org.elasticsearch.index.store.Store;
@@ -77,6 +77,7 @@ public final class EngineConfig {
     private final boolean forceNewTranslog;
     private final QueryCache queryCache;
     private final QueryCachingPolicy queryCachingPolicy;
+    private final IndexSearcherWrappingService wrappingService;
 
     /**
      * Index setting for index concurrency / number of threadstates in the indexwriter.
@@ -143,7 +144,7 @@ public final class EngineConfig {
                         Settings indexSettings, IndicesWarmer warmer, Store store, SnapshotDeletionPolicy deletionPolicy,
                         MergePolicy mergePolicy, MergeSchedulerConfig mergeSchedulerConfig, Analyzer analyzer,
                         Similarity similarity, CodecService codecService, Engine.FailedEngineListener failedEngineListener,
-                        TranslogRecoveryPerformer translogRecoveryPerformer, QueryCache queryCache, QueryCachingPolicy queryCachingPolicy, TranslogConfig translogConfig) {
+                        TranslogRecoveryPerformer translogRecoveryPerformer, QueryCache queryCache, QueryCachingPolicy queryCachingPolicy, IndexSearcherWrappingService wrappingService, TranslogConfig translogConfig) {
         this.shardId = shardId;
         this.indexSettings = indexSettings;
         this.threadPool = threadPool;
@@ -157,6 +158,7 @@ public final class EngineConfig {
         this.similarity = similarity;
         this.codecService = codecService;
         this.failedEngineListener = failedEngineListener;
+        this.wrappingService = wrappingService;
         this.optimizeAutoGenerateId = indexSettings.getAsBoolean(EngineConfig.INDEX_OPTIMIZE_AUTOGENERATED_ID_SETTING, false);
         this.compoundOnFlush = indexSettings.getAsBoolean(EngineConfig.INDEX_COMPOUND_ON_FLUSH, compoundOnFlush);
         this.indexConcurrency = indexSettings.getAsInt(EngineConfig.INDEX_CONCURRENCY_SETTING, Math.max(IndexWriterConfig.DEFAULT_MAX_THREAD_STATES, (int) (EsExecutors.boundedNumberOfProcessors(indexSettings) * 0.65)));
@@ -421,6 +423,10 @@ public final class EngineConfig {
         return queryCachingPolicy;
     }
 
+    public IndexSearcherWrappingService getWrappingService() {
+        return wrappingService;
+    }
+
     /**
      * Returns the translog config for this engine
      */

core/src/main/java/org/elasticsearch/index/engine/IndexSearcherWrapper.java

@@ -0,0 +1,45 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.index.engine;
+
+import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.search.IndexSearcher;
+
+/**
+ * Extension point to add custom functionality at request time to the {@link DirectoryReader}
+ * and {@link IndexSearcher} managed by the {@link Engine}.
+ */
+public interface IndexSearcherWrapper {
+
+    /**
+     * @param reader The provided directory reader to be wrapped to add custom functionality
+     * @return a new directory reader wrapping the provided directory reader or if no wrapping was performed
+     *         the provided directory reader
+     */
+    DirectoryReader wrap(DirectoryReader reader);
+
+    /**
+     * @param searcher The provided index searcher to be wrapped to add custom functionality
+     * @return a new index searcher wrapping the provided index searcher or if no wrapping was performed
+     *         the provided index searcher
+     */
+    IndexSearcher wrap(IndexSearcher searcher) throws EngineException;
+
+}

core/src/main/java/org/elasticsearch/index/engine/IndexSearcherWrappingService.java

@@ -0,0 +1,94 @@
+/*
+ * 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.engine;
+
+import org.apache.lucene.index.DirectoryReader;
+import org.apache.lucene.search.IndexSearcher;
+import org.elasticsearch.ElasticsearchException;
+import org.elasticsearch.common.inject.Inject;
+import org.elasticsearch.index.engine.Engine.Searcher;
+
+import java.util.Set;
+
+/**
+ * Service responsible for wrapping the {@link DirectoryReader} and {@link IndexSearcher} of a {@link Searcher} via the
+ * configured {@link IndexSearcherWrapper} instance. This allows custom functionally to be added the {@link Searcher}
+ * before being used to do an operation (search, get, field stats etc.)
+ */
+// TODO: This needs extension point is a bit hacky now, because the IndexSearch from the engine can only be wrapped once,
+// if we allowed the IndexSearcher to be wrapped multiple times then a custom IndexSearcherWrapper needs have good
+// control over its location in the wrapping chain
+public final class IndexSearcherWrappingService {
+
+    private final IndexSearcherWrapper wrapper;
+
+    // for unit tests:
+    IndexSearcherWrappingService() {
+        this.wrapper = null;
+    }
+
+    @Inject
+    // Use a Set parameter here, because constructor parameter can't be optional
+    // and I prefer to keep the `wrapper` field final.
+    public IndexSearcherWrappingService(Set<IndexSearcherWrapper> wrappers) {
+        if (wrappers.size() > 1) {
+            throw new IllegalStateException("wrapping of the index searcher by more than one wrappers is forbidden, found the following wrappers [" + wrappers + "]");
+        }
+        if (wrappers.isEmpty()) {
+            this.wrapper = null;
+        } else {
+            this.wrapper = wrappers.iterator().next();
+        }
+    }
+
+    /**
+     * If there are configured {@link IndexSearcherWrapper} instances, the {@link IndexSearcher} of the provided engine searcher
+     * gets wrapped and a new {@link Searcher} instances is returned, otherwise the provided {@link Searcher} is returned.
+     *
+     * This is invoked each time a {@link Searcher} is requested to do an operation. (for example search)
+     */
+    public Searcher wrap(EngineConfig engineConfig, final Searcher engineSearcher) throws EngineException {
+        if (wrapper == null) {
+            return engineSearcher;
+        }
+
+        DirectoryReader reader = wrapper.wrap((DirectoryReader) engineSearcher.reader());
+        IndexSearcher innerIndexSearcher = new IndexSearcher(reader);
+        innerIndexSearcher.setQueryCache(engineConfig.getQueryCache());
+        innerIndexSearcher.setQueryCachingPolicy(engineConfig.getQueryCachingPolicy());
+        innerIndexSearcher.setSimilarity(engineConfig.getSimilarity());
+        // TODO: Right now IndexSearcher isn't wrapper friendly, when it becomes wrapper friendly we should revise this extension point
+        // For example if IndexSearcher#rewrite() is overwritten than also IndexSearcher#createNormalizedWeight needs to be overwritten
+        // This needs to be fixed before we can allow the IndexSearcher from Engine to be wrapped multiple times
+        IndexSearcher indexSearcher = wrapper.wrap(innerIndexSearcher);
+        if (reader == engineSearcher.reader() && indexSearcher == innerIndexSearcher) {
+            return engineSearcher;
+        } else {
+            return new Engine.Searcher(engineSearcher.source(), indexSearcher) {
+
+                @Override
+                public void close() throws ElasticsearchException {
+                    engineSearcher.close();
+                }
+            };
+        }
+    }
+
+}

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

@@ -21,12 +21,13 @@ package org.elasticsearch.index.fielddata;
 
 import com.google.common.collect.ImmutableMap;
 import com.google.common.collect.Maps;
+
 import org.elasticsearch.ExceptionsHelper;
+import org.elasticsearch.Version;
 import org.elasticsearch.common.collect.MapBuilder;
 import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.inject.Inject;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.common.util.concurrent.KeyedLock;
 import org.elasticsearch.index.AbstractIndexComponent;
 import org.elasticsearch.index.Index;
 import org.elasticsearch.index.fielddata.plain.*;
@@ -136,11 +137,16 @@ public class IndexFieldDataService extends AbstractIndexComponent {
     }
 
     private final IndicesFieldDataCache indicesFieldDataCache;
-    private final KeyedLock.GlobalLockable<String> fieldLoadingLock = new KeyedLock.GlobalLockable<>();
-    private final Map<String, IndexFieldDataCache> fieldDataCaches = Maps.newHashMap(); // no need for concurrency support, always used under lock
+    // the below map needs to be modified under a lock
+    private final Map<String, IndexFieldDataCache> fieldDataCaches = Maps.newHashMap();
 
     IndexService indexService;
 
+    // We need to cache fielddata on the _parent field because of 1.x indices.
+    // When we don't support 1.x anymore (3.0) then remove this caching
+    // This variable needs to be read/written under lock
+    private IndexFieldData<?> parentIndexFieldData;
+
     @Inject
     public IndexFieldDataService(Index index, @IndexSettings Settings indexSettings, IndicesFieldDataCache indicesFieldDataCache,
                                  CircuitBreakerService circuitBreakerService) {
@@ -154,41 +160,35 @@ public class IndexFieldDataService extends AbstractIndexComponent {
         this.indexService = indexService;
     }
 
-    public void clear() {
-        fieldLoadingLock.globalLock().lock();
-        try {
-            List<Throwable> exceptions = new ArrayList<>(0);
-            final Collection<IndexFieldDataCache> fieldDataCacheValues = fieldDataCaches.values();
-            for (IndexFieldDataCache cache : fieldDataCacheValues) {
-                try {
-                    cache.clear();
-                } catch (Throwable t) {
-                    exceptions.add(t);
-                }
+    public synchronized void clear() {
+        parentIndexFieldData = null;
+        List<Throwable> exceptions = new ArrayList<>(0);
+        final Collection<IndexFieldDataCache> fieldDataCacheValues = fieldDataCaches.values();
+        for (IndexFieldDataCache cache : fieldDataCacheValues) {
+            try {
+                cache.clear();
+            } catch (Throwable t) {
+                exceptions.add(t);
             }
-            fieldDataCacheValues.clear();
-            ExceptionsHelper.maybeThrowRuntimeAndSuppress(exceptions);
-        } finally {
-            fieldLoadingLock.globalLock().unlock();
         }
+        fieldDataCacheValues.clear();
+        ExceptionsHelper.maybeThrowRuntimeAndSuppress(exceptions);
     }
 
-    public void clearField(final String fieldName) {
-        fieldLoadingLock.acquire(fieldName);
-        try {
-            List<Throwable> exceptions = new ArrayList<>(0);
-            final IndexFieldDataCache cache = fieldDataCaches.remove(fieldName);
-            if (cache != null) {
-                try {
-                    cache.clear();
-                } catch (Throwable t) {
-                    exceptions.add(t);
-                }
-            }
-            ExceptionsHelper.maybeThrowRuntimeAndSuppress(exceptions);
-        } finally {
-            fieldLoadingLock.release(fieldName);
+    public synchronized void clearField(final String fieldName) {
+        if (ParentFieldMapper.NAME.equals(fieldName)) {
+            parentIndexFieldData = null;
         }
+        List<Throwable> exceptions = new ArrayList<>(0);
+        final IndexFieldDataCache cache = fieldDataCaches.remove(fieldName);
+        if (cache != null) {
+            try {
+                cache.clear();
+            } catch (Throwable t) {
+                exceptions.add(t);
+            }
+        }
+        ExceptionsHelper.maybeThrowRuntimeAndSuppress(exceptions);
     }
 
     @SuppressWarnings("unchecked")
@@ -199,32 +199,31 @@ public class IndexFieldDataService extends AbstractIndexComponent {
             throw new IllegalArgumentException("found no fielddata type for field [" + fieldNames.fullName() + "]");
         }
         final boolean docValues = fieldType.hasDocValues();
-        final String key = fieldNames.indexName();
-        fieldLoadingLock.acquire(key);
-        try {
-            IndexFieldData.Builder builder = null;
-            String format = type.getFormat(indexSettings);
-            if (format != null && FieldDataType.DOC_VALUES_FORMAT_VALUE.equals(format) && !docValues) {
-                logger.warn("field [" + fieldNames.fullName() + "] has no doc values, will use default field data format");
-                format = null;
-            }
-            if (format != null) {
-                builder = buildersByTypeAndFormat.get(Tuple.tuple(type.getType(), format));
-                if (builder == null) {
-                    logger.warn("failed to find format [" + format + "] for field [" + fieldNames.fullName() + "], will use default");
-                }
-            }
-            if (builder == null && docValues) {
-                builder = docValuesBuildersByType.get(type.getType());
-            }
+        IndexFieldData.Builder builder = null;
+        String format = type.getFormat(indexSettings);
+        if (format != null && FieldDataType.DOC_VALUES_FORMAT_VALUE.equals(format) && !docValues) {
+            logger.warn("field [" + fieldNames.fullName() + "] has no doc values, will use default field data format");
+            format = null;
+        }
+        if (format != null) {
+            builder = buildersByTypeAndFormat.get(Tuple.tuple(type.getType(), format));
             if (builder == null) {
-                builder = buildersByType.get(type.getType());
-            }
-            if (builder == null) {
-                throw new IllegalArgumentException("failed to find field data builder for field " + fieldNames.fullName() + ", and type " + type.getType());
+                logger.warn("failed to find format [" + format + "] for field [" + fieldNames.fullName() + "], will use default");
             }
+        }
+        if (builder == null && docValues) {
+            builder = docValuesBuildersByType.get(type.getType());
+        }
+        if (builder == null) {
+            builder = buildersByType.get(type.getType());
+        }
+        if (builder == null) {
+            throw new IllegalArgumentException("failed to find field data builder for field " + fieldNames.fullName() + ", and type " + type.getType());
+        }
 
-            IndexFieldDataCache cache = fieldDataCaches.get(fieldNames.indexName());
+        IndexFieldDataCache cache;
+        synchronized (this) {
+            cache = fieldDataCaches.get(fieldNames.indexName());
             if (cache == null) {
                 //  we default to node level cache, which in turn defaults to be unbounded
                 // this means changing the node level settings is simple, just set the bounds there
@@ -239,10 +238,18 @@ public class IndexFieldDataService extends AbstractIndexComponent {
                 fieldDataCaches.put(fieldNames.indexName(), cache);
             }
 
-            return (IFD) builder.build(index, indexSettings, fieldType, cache, circuitBreakerService, indexService.mapperService());
-        } finally {
-            fieldLoadingLock.release(key);
+            // Remove this in 3.0
+            final boolean isOldParentField = ParentFieldMapper.NAME.equals(fieldNames.indexName())
+                    && Version.indexCreated(indexSettings).before(Version.V_2_0_0_beta1);
+            if (isOldParentField) {
+                if (parentIndexFieldData == null) {
+                    parentIndexFieldData = builder.build(index, indexSettings, fieldType, cache, circuitBreakerService, indexService.mapperService());
+                }
+                return (IFD) parentIndexFieldData;
+            }
         }
+
+        return (IFD) builder.build(index, indexSettings, fieldType, cache, circuitBreakerService, indexService.mapperService());
     }
 
 }

core/src/main/java/org/elasticsearch/index/fielddata/plain/AbstractAtomicOrdinalsFieldData.java

@@ -64,7 +64,7 @@ public abstract class AbstractAtomicOrdinalsFieldData implements AtomicOrdinalsF
 
             @Override
             public RandomAccessOrds getOrdinalsValues() {
-                return (RandomAccessOrds) DocValues.emptySortedSet();
+                return DocValues.emptySortedSet();
             }
         };
     }

core/src/main/java/org/elasticsearch/index/fielddata/plain/AbstractIndexFieldData.java

@@ -19,8 +19,8 @@
 
 package org.elasticsearch.index.fielddata.plain;
 
-import org.apache.lucene.index.LeafReaderContext;
 import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.index.LeafReaderContext;
 import org.apache.lucene.index.Terms;
 import org.apache.lucene.index.TermsEnum;
 import org.apache.lucene.util.BytesRef;
@@ -29,7 +29,6 @@ import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.index.AbstractIndexComponent;
 import org.elasticsearch.index.Index;
 import org.elasticsearch.index.fielddata.*;
-import org.elasticsearch.index.mapper.FieldMapper;
 import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.settings.IndexSettings;
 
@@ -72,6 +71,11 @@ public abstract class AbstractIndexFieldData<FD extends AtomicFieldData> extends
 
     @Override
     public FD load(LeafReaderContext context) {
+        if (context.reader().getFieldInfos().fieldInfo(fieldNames.indexName()) == null) {
+            // If the field doesn't exist, then don't bother with loading and adding an empty instance to the field data cache
+            return empty(context.reader().maxDoc());
+        }
+
         try {
             FD fd = cache.load(context, this);
             return fd;
@@ -84,6 +88,12 @@ public abstract class AbstractIndexFieldData<FD extends AtomicFieldData> extends
         }
     }
 
+    /**
+     * @param maxDoc of the current reader
+     * @return an empty field data instances for field data lookups of empty segments (returning no values)
+     */
+    protected abstract FD empty(int maxDoc);
+
     /**
      * A {@code PerValueEstimator} is a sub-class that can be used to estimate
      * the memory overhead for loading the data. Each field data

core/src/main/java/org/elasticsearch/index/fielddata/plain/AbstractIndexGeoPointFieldData.java

@@ -80,4 +80,9 @@ abstract class AbstractIndexGeoPointFieldData extends AbstractIndexFieldData<Ato
         throw new IllegalArgumentException("can't sort on geo_point field without using specific sorting feature, like geo_distance");
     }
 
+    @Override
+    protected AtomicGeoPointFieldData empty(int maxDoc) {
+        return AbstractAtomicGeoPointFieldData.empty(maxDoc);
+    }
+
 }

core/src/main/java/org/elasticsearch/index/fielddata/plain/AbstractIndexOrdinalsFieldData.java

@@ -80,6 +80,11 @@ public abstract class AbstractIndexOrdinalsFieldData extends AbstractIndexFieldD
         return GlobalOrdinalsBuilder.build(indexReader, this, indexSettings, breakerService, logger);
     }
 
+    @Override
+    protected AtomicOrdinalsFieldData empty(int maxDoc) {
+        return AbstractAtomicOrdinalsFieldData.empty();
+    }
+
     protected TermsEnum filter(Terms terms, LeafReader reader) throws IOException {
         TermsEnum iterator = terms.iterator();
         if (iterator == null) {

core/src/main/java/org/elasticsearch/index/fielddata/plain/DisabledIndexFieldData.java

@@ -55,6 +55,11 @@ public final class DisabledIndexFieldData extends AbstractIndexFieldData<AtomicF
         throw fail();
     }
 
+    @Override
+    protected AtomicFieldData empty(int maxDoc) {
+        throw fail();
+    }
+
     @Override
     public IndexFieldData.XFieldComparatorSource comparatorSource(Object missingValue, MultiValueMode sortMode, Nested nested) {
         throw fail();

core/src/main/java/org/elasticsearch/index/fielddata/plain/DoubleArrayIndexFieldData.java

@@ -19,40 +19,19 @@
 
 package org.elasticsearch.index.fielddata.plain;
 
-import org.apache.lucene.index.DocValues;
-import org.apache.lucene.index.LeafReader;
-import org.apache.lucene.index.LeafReaderContext;
-import org.apache.lucene.index.RandomAccessOrds;
-import org.apache.lucene.index.SortedDocValues;
-import org.apache.lucene.index.SortedSetDocValues;
-import org.apache.lucene.index.Terms;
-import org.apache.lucene.util.Accountable;
-import org.apache.lucene.util.Accountables;
-import org.apache.lucene.util.BitSet;
-import org.apache.lucene.util.Bits;
-import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.BytesRefIterator;
-import org.apache.lucene.util.NumericUtils;
-import org.apache.lucene.util.RamUsageEstimator;
+import org.apache.lucene.index.*;
+import org.apache.lucene.util.*;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.breaker.CircuitBreaker;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.BigArrays;
 import org.elasticsearch.common.util.DoubleArray;
 import org.elasticsearch.index.Index;
-import org.elasticsearch.index.fielddata.AtomicNumericFieldData;
-import org.elasticsearch.index.fielddata.FieldData;
-import org.elasticsearch.index.fielddata.FieldDataType;
-import org.elasticsearch.index.fielddata.IndexFieldData;
+import org.elasticsearch.index.fielddata.*;
 import org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource.Nested;
-import org.elasticsearch.index.fielddata.IndexFieldDataCache;
-import org.elasticsearch.index.fielddata.IndexNumericFieldData;
-import org.elasticsearch.index.fielddata.NumericDoubleValues;
-import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
 import org.elasticsearch.index.fielddata.fieldcomparator.DoubleValuesComparatorSource;
 import org.elasticsearch.index.fielddata.ordinals.Ordinals;
 import org.elasticsearch.index.fielddata.ordinals.OrdinalsBuilder;
-import org.elasticsearch.index.mapper.FieldMapper;
 import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.index.settings.IndexSettings;
@@ -206,6 +185,11 @@ public class DoubleArrayIndexFieldData extends AbstractIndexFieldData<AtomicNume
 
     }
 
+    @Override
+    protected AtomicNumericFieldData empty(int maxDoc) {
+        return AtomicDoubleFieldData.empty(maxDoc);
+    }
+
     @Override
     public XFieldComparatorSource comparatorSource(@Nullable Object missingValue, MultiValueMode sortMode, Nested nested) {
         return new DoubleValuesComparatorSource(this, missingValue, sortMode, nested);

core/src/main/java/org/elasticsearch/index/fielddata/plain/FloatArrayIndexFieldData.java

@@ -18,40 +18,19 @@
  */
 package org.elasticsearch.index.fielddata.plain;
 
-import org.apache.lucene.index.DocValues;
-import org.apache.lucene.index.LeafReader;
-import org.apache.lucene.index.LeafReaderContext;
-import org.apache.lucene.index.RandomAccessOrds;
-import org.apache.lucene.index.SortedDocValues;
-import org.apache.lucene.index.SortedSetDocValues;
-import org.apache.lucene.index.Terms;
-import org.apache.lucene.util.Accountable;
-import org.apache.lucene.util.Accountables;
-import org.apache.lucene.util.BitSet;
-import org.apache.lucene.util.Bits;
-import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.BytesRefIterator;
-import org.apache.lucene.util.NumericUtils;
-import org.apache.lucene.util.RamUsageEstimator;
+import org.apache.lucene.index.*;
+import org.apache.lucene.util.*;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.breaker.CircuitBreaker;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.util.BigArrays;
 import org.elasticsearch.common.util.FloatArray;
 import org.elasticsearch.index.Index;
-import org.elasticsearch.index.fielddata.AtomicNumericFieldData;
-import org.elasticsearch.index.fielddata.FieldData;
-import org.elasticsearch.index.fielddata.FieldDataType;
-import org.elasticsearch.index.fielddata.IndexFieldData;
+import org.elasticsearch.index.fielddata.*;
 import org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource.Nested;
-import org.elasticsearch.index.fielddata.IndexFieldDataCache;
-import org.elasticsearch.index.fielddata.IndexNumericFieldData;
-import org.elasticsearch.index.fielddata.NumericDoubleValues;
-import org.elasticsearch.index.fielddata.SortedNumericDoubleValues;
 import org.elasticsearch.index.fielddata.fieldcomparator.FloatValuesComparatorSource;
 import org.elasticsearch.index.fielddata.ordinals.Ordinals;
 import org.elasticsearch.index.fielddata.ordinals.OrdinalsBuilder;
-import org.elasticsearch.index.mapper.FieldMapper;
 import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.index.settings.IndexSettings;
@@ -204,6 +183,11 @@ public class FloatArrayIndexFieldData extends AbstractIndexFieldData<AtomicNumer
 
     }
 
+    @Override
+    protected AtomicNumericFieldData empty(int maxDoc) {
+        return AtomicDoubleFieldData.empty(maxDoc);
+    }
+
     @Override
     public XFieldComparatorSource comparatorSource(@Nullable Object missingValue, MultiValueMode sortMode, Nested nested) {
         return new FloatValuesComparatorSource(this, missingValue, sortMode, nested);

core/src/main/java/org/elasticsearch/index/fielddata/plain/PackedArrayIndexFieldData.java

@@ -20,24 +20,9 @@
 package org.elasticsearch.index.fielddata.plain;
 
 import com.google.common.base.Preconditions;
-
-import org.apache.lucene.index.DocValues;
-import org.apache.lucene.index.LeafReader;
-import org.apache.lucene.index.LeafReaderContext;
-import org.apache.lucene.index.NumericDocValues;
-import org.apache.lucene.index.RandomAccessOrds;
-import org.apache.lucene.index.SortedDocValues;
-import org.apache.lucene.index.SortedNumericDocValues;
-import org.apache.lucene.index.Terms;
-import org.apache.lucene.index.TermsEnum;
-import org.apache.lucene.util.Accountable;
-import org.apache.lucene.util.Accountables;
+import org.apache.lucene.index.*;
+import org.apache.lucene.util.*;
 import org.apache.lucene.util.BitSet;
-import org.apache.lucene.util.Bits;
-import org.apache.lucene.util.BytesRef;
-import org.apache.lucene.util.BytesRefIterator;
-import org.apache.lucene.util.LongValues;
-import org.apache.lucene.util.RamUsageEstimator;
 import org.apache.lucene.util.packed.PackedInts;
 import org.apache.lucene.util.packed.PackedLongValues;
 import org.elasticsearch.ElasticsearchException;
@@ -45,18 +30,11 @@ import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.breaker.CircuitBreaker;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.index.Index;
-import org.elasticsearch.index.fielddata.AtomicNumericFieldData;
-import org.elasticsearch.index.fielddata.FieldData;
-import org.elasticsearch.index.fielddata.FieldDataType;
-import org.elasticsearch.index.fielddata.IndexFieldData;
+import org.elasticsearch.index.fielddata.*;
 import org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource.Nested;
-import org.elasticsearch.index.fielddata.IndexFieldDataCache;
-import org.elasticsearch.index.fielddata.IndexNumericFieldData;
-import org.elasticsearch.index.fielddata.RamAccountingTermsEnum;
 import org.elasticsearch.index.fielddata.fieldcomparator.LongValuesComparatorSource;
 import org.elasticsearch.index.fielddata.ordinals.Ordinals;
 import org.elasticsearch.index.fielddata.ordinals.OrdinalsBuilder;
-import org.elasticsearch.index.mapper.FieldMapper;
 import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.index.settings.IndexSettings;
@@ -64,11 +42,7 @@ import org.elasticsearch.indices.breaker.CircuitBreakerService;
 import org.elasticsearch.search.MultiValueMode;
 
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.Collection;
-import java.util.Collections;
-import java.util.EnumSet;
-import java.util.List;
+import java.util.*;
 
 /**
  * Stores numeric data into bit-packed arrays for better memory efficiency.
@@ -404,6 +378,11 @@ public class PackedArrayIndexFieldData extends AbstractIndexFieldData<AtomicNume
         return pageMemorySize;
     }
 
+    @Override
+    protected AtomicNumericFieldData empty(int maxDoc) {
+        return AtomicLongFieldData.empty(maxDoc);
+    }
+
     @Override
     public XFieldComparatorSource comparatorSource(@Nullable Object missingValue, MultiValueMode sortMode, Nested nested) {
         return new LongValuesComparatorSource(this, missingValue, sortMode, nested);

core/src/main/java/org/elasticsearch/index/fielddata/plain/ParentChildIndexFieldData.java

@@ -23,6 +23,7 @@ import com.carrotsearch.hppc.ObjectObjectHashMap;
 import com.carrotsearch.hppc.cursors.ObjectObjectCursor;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.ImmutableSortedSet;
+
 import org.apache.lucene.index.*;
 import org.apache.lucene.index.MultiDocValues.OrdinalMap;
 import org.apache.lucene.search.DocIdSetIterator;
@@ -79,12 +80,23 @@ public class ParentChildIndexFieldData extends AbstractIndexFieldData<AtomicPare
                                      FieldDataType fieldDataType, IndexFieldDataCache cache, MapperService mapperService,
                                      CircuitBreakerService breakerService) {
         super(index, indexSettings, fieldNames, fieldDataType, cache);
-        parentTypes = new TreeSet<>();
         this.breakerService = breakerService;
-        for (DocumentMapper documentMapper : mapperService.docMappers(false)) {
-            beforeCreate(documentMapper);
+        if (Version.indexCreated(indexSettings).before(Version.V_2_0_0_beta1)) {
+            parentTypes = new TreeSet<>();
+            for (DocumentMapper documentMapper : mapperService.docMappers(false)) {
+                beforeCreate(documentMapper);
+            }
+            mapperService.addTypeListener(this);
+        } else {
+            ImmutableSortedSet.Builder<String> builder = ImmutableSortedSet.naturalOrder();
+            for (DocumentMapper mapper : mapperService.docMappers(false)) {
+                ParentFieldMapper parentFieldMapper = mapper.parentFieldMapper();
+                if (parentFieldMapper.active()) {
+                    builder.add(parentFieldMapper.type());
+                }
+            }
+            parentTypes = builder.build();
         }
-        mapperService.addTypeListener(this);
     }
 
     @Override
@@ -96,10 +108,6 @@ public class ParentChildIndexFieldData extends AbstractIndexFieldData<AtomicPare
     public AtomicParentChildFieldData load(LeafReaderContext context) {
         if (Version.indexCreated(indexSettings).onOrAfter(Version.V_2_0_0_beta1)) {
             final LeafReader reader = context.reader();
-            final NavigableSet<String> parentTypes;
-            synchronized (lock) {
-                parentTypes = ImmutableSortedSet.copyOf(this.parentTypes);
-            }
             return new AbstractAtomicParentChildFieldData() {
 
                 public Set<String> types() {
@@ -131,12 +139,22 @@ public class ParentChildIndexFieldData extends AbstractIndexFieldData<AtomicPare
                 }
             };
         } else {
-            return super.load(context);
+            try {
+                return cache.load(context, this);
+            } catch (Throwable e) {
+                if (e instanceof ElasticsearchException) {
+                    throw (ElasticsearchException) e;
+                } else {
+                    throw new ElasticsearchException(e.getMessage(), e);
+                }
+            }
         }
     }
 
     @Override
     public AbstractAtomicParentChildFieldData loadDirect(LeafReaderContext context) throws Exception {
+        // Make this method throw an UnsupportedOperationException in 3.0, only
+        // needed for indices created BEFORE 2.0
         LeafReader reader = context.reader();
         final float acceptableTransientOverheadRatio = fieldDataType.getSettings().getAsFloat(
                 "acceptable_transient_overhead_ratio", OrdinalsBuilder.DEFAULT_ACCEPTABLE_OVERHEAD_RATIO
@@ -211,6 +229,7 @@ public class ParentChildIndexFieldData extends AbstractIndexFieldData<AtomicPare
 
     @Override
     public void beforeCreate(DocumentMapper mapper) {
+        // Remove in 3.0
         synchronized (lock) {
             ParentFieldMapper parentFieldMapper = mapper.parentFieldMapper();
             if (parentFieldMapper.active()) {
@@ -224,13 +243,8 @@ public class ParentChildIndexFieldData extends AbstractIndexFieldData<AtomicPare
     }
 
     @Override
-    public void afterRemove(DocumentMapper mapper) {
-        synchronized (lock) {
-            ParentFieldMapper parentFieldMapper = mapper.parentFieldMapper();
-            if (parentFieldMapper.active()) {
-                parentTypes.remove(new BytesRef(parentFieldMapper.type()));
-            }
-        }
+    protected AtomicParentChildFieldData empty(int maxDoc) {
+        return new ParentChildAtomicFieldData(ImmutableOpenMap.<String, AtomicOrdinalsFieldData>of());
     }
 
     class TypeBuilder {
@@ -345,8 +359,12 @@ public class ParentChildIndexFieldData extends AbstractIndexFieldData<AtomicPare
     public IndexParentChildFieldData localGlobalDirect(IndexReader indexReader) throws Exception {
         final long startTime = System.nanoTime();
         final Set<String> parentTypes;
-        synchronized (lock) {
-            parentTypes = ImmutableSet.copyOf(this.parentTypes);
+        if (Version.indexCreated(indexSettings).before(Version.V_2_0_0_beta1)) {
+            synchronized (lock) {
+                parentTypes = ImmutableSet.copyOf(this.parentTypes);
+            }
+        } else {
+            parentTypes = this.parentTypes;
         }
 
         long ramBytesUsed = 0;

core/src/main/java/org/elasticsearch/index/mapper/DocumentTypeListener.java

@@ -30,11 +30,4 @@ public interface DocumentTypeListener {
      */
     void beforeCreate(DocumentMapper mapper);
 
-    /**
-     * Invoked just after an existing document type has been removed.
-     *
-     * @param mapper The existing document mapper of the type being removed
-     */
-    void afterRemove(DocumentMapper mapper);
-
 }

core/src/main/java/org/elasticsearch/index/mapper/MappedFieldType.java

@@ -30,7 +30,6 @@ import org.apache.lucene.util.BytesRef;
 import org.elasticsearch.action.fieldstats.FieldStats;
 import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.lucene.BytesRefs;
-import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.Fuzziness;
 import org.elasticsearch.index.analysis.NamedAnalyzer;
 import org.elasticsearch.index.fielddata.FieldDataType;
@@ -186,6 +185,7 @@ public abstract class MappedFieldType extends FieldType {
         fieldDataType = new FieldDataType(typeName());
     }
 
+    @Override
     public abstract MappedFieldType clone();
 
     @Override
@@ -449,7 +449,7 @@ public abstract class MappedFieldType extends FieldType {
         return new TermsQuery(names.indexName(), bytesRefs);
     }
 
-    public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
+    public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper) {
         return new TermRangeQuery(names().indexName(),
             lowerTerm == null ? null : indexedValueForSearch(lowerTerm),
             upperTerm == null ? null : indexedValueForSearch(upperTerm),

core/src/main/java/org/elasticsearch/index/mapper/MapperService.java

@@ -622,6 +622,10 @@ public class MapperService extends AbstractIndexComponent  {
         return META_FIELDS.contains(fieldName);
     }
 
+    public static String[] getAllMetaFields() {
+        return META_FIELDS.toArray(String.class);
+    }
+
     /** An analyzer wrapper that can lookup fields within the index mappings */
     final class MapperAnalyzerWrapper extends DelegatingAnalyzerWrapper {
 

core/src/main/java/org/elasticsearch/index/mapper/core/ByteFieldMapper.java

@@ -30,7 +30,6 @@ import org.apache.lucene.util.BytesRefBuilder;
 import org.apache.lucene.util.NumericUtils;
 import org.elasticsearch.action.fieldstats.FieldStats;
 import org.elasticsearch.common.Explicit;
-import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.Fuzziness;
@@ -42,8 +41,6 @@ import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.Mapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
 import org.elasticsearch.index.mapper.ParseContext;
-import org.elasticsearch.index.query.QueryParseContext;
-
 import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
@@ -163,7 +160,7 @@ public class ByteFieldMapper extends NumberFieldMapper {
         }
 
         @Override
-        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
+        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper) {
             return NumericRangeQuery.newIntRange(names().indexName(), numericPrecisionStep(),
                 lowerTerm == null ? null : (int)parseValue(lowerTerm),
                 upperTerm == null ? null : (int)parseValue(upperTerm),

core/src/main/java/org/elasticsearch/index/mapper/core/DateFieldMapper.java

@@ -51,12 +51,15 @@ import org.elasticsearch.index.mapper.Mapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
 import org.elasticsearch.index.mapper.ParseContext;
 import org.elasticsearch.index.mapper.core.LongFieldMapper.CustomLongNumericField;
-import org.elasticsearch.index.query.QueryParseContext;
 import org.elasticsearch.search.internal.SearchContext;
 import org.joda.time.DateTimeZone;
 
 import java.io.IOException;
-import java.util.*;
+import java.util.Iterator;
+import java.util.List;
+import java.util.Locale;
+import java.util.Map;
+import java.util.Objects;
 import java.util.concurrent.Callable;
 import java.util.concurrent.TimeUnit;
 
@@ -124,6 +127,7 @@ public class DateFieldMapper extends NumberFieldMapper {
             return fieldMapper;
         }
 
+        @Override
         protected void setupFieldType(BuilderContext context) {
             if (Version.indexCreated(context.indexSettings()).before(Version.V_2_0_0_beta1) &&
                 !fieldType().dateTimeFormatter().format().contains("epoch_")) {
@@ -277,6 +281,7 @@ public class DateFieldMapper extends NumberFieldMapper {
             this.dateMathParser = ref.dateMathParser;
         }
 
+        @Override
         public DateFieldType clone() {
             return new DateFieldType(this);
         }
@@ -390,8 +395,8 @@ public class DateFieldMapper extends NumberFieldMapper {
         }
 
         @Override
-        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
-            return rangeQuery(lowerTerm, upperTerm, includeLower, includeUpper, null, null, context);
+        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper) {
+            return rangeQuery(lowerTerm, upperTerm, includeLower, includeUpper, null, null);
         }
 
         @Override
@@ -419,7 +424,7 @@ public class DateFieldMapper extends NumberFieldMapper {
             );
         }
 
-        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable DateTimeZone timeZone, @Nullable DateMathParser forcedDateParser, @Nullable QueryParseContext context) {
+        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable DateTimeZone timeZone, @Nullable DateMathParser forcedDateParser) {
             return new LateParsingQuery(lowerTerm, upperTerm, includeLower, includeUpper, timeZone, forcedDateParser);
         }
 

core/src/main/java/org/elasticsearch/index/mapper/core/DoubleFieldMapper.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.index.mapper.core;
 
 import com.carrotsearch.hppc.DoubleArrayList;
+
 import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.analysis.TokenStream;
 import org.apache.lucene.document.Field;
@@ -32,7 +33,6 @@ import org.apache.lucene.util.BytesRefBuilder;
 import org.apache.lucene.util.NumericUtils;
 import org.elasticsearch.action.fieldstats.FieldStats;
 import org.elasticsearch.common.Explicit;
-import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.Numbers;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.Fuzziness;
@@ -46,7 +46,6 @@ import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.Mapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
 import org.elasticsearch.index.mapper.ParseContext;
-import org.elasticsearch.index.query.QueryParseContext;
 
 import java.io.IOException;
 import java.util.Iterator;
@@ -169,7 +168,7 @@ public class DoubleFieldMapper extends NumberFieldMapper {
         }
 
         @Override
-        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
+        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper) {
             return NumericRangeQuery.newDoubleRange(names().indexName(), numericPrecisionStep(),
                 lowerTerm == null ? null : parseDoubleValue(lowerTerm),
                 upperTerm == null ? null : parseDoubleValue(upperTerm),

core/src/main/java/org/elasticsearch/index/mapper/core/FloatFieldMapper.java

@@ -20,6 +20,7 @@
 package org.elasticsearch.index.mapper.core;
 
 import com.carrotsearch.hppc.FloatArrayList;
+
 import org.apache.lucene.analysis.Analyzer;
 import org.apache.lucene.analysis.TokenStream;
 import org.apache.lucene.document.Field;
@@ -32,7 +33,6 @@ import org.apache.lucene.util.BytesRefBuilder;
 import org.apache.lucene.util.NumericUtils;
 import org.elasticsearch.action.fieldstats.FieldStats;
 import org.elasticsearch.common.Explicit;
-import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.Numbers;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.settings.Settings;
@@ -47,7 +47,6 @@ import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.Mapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
 import org.elasticsearch.index.mapper.ParseContext;
-import org.elasticsearch.index.query.QueryParseContext;
 
 import java.io.IOException;
 import java.util.Iterator;
@@ -170,7 +169,7 @@ public class FloatFieldMapper extends NumberFieldMapper {
         }
 
         @Override
-        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
+        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper) {
             return NumericRangeQuery.newFloatRange(names().indexName(), numericPrecisionStep(),
                 lowerTerm == null ? null : parseValue(lowerTerm),
                 upperTerm == null ? null : parseValue(upperTerm),

core/src/main/java/org/elasticsearch/index/mapper/core/IntegerFieldMapper.java

@@ -31,7 +31,6 @@ import org.apache.lucene.util.BytesRefBuilder;
 import org.apache.lucene.util.NumericUtils;
 import org.elasticsearch.action.fieldstats.FieldStats;
 import org.elasticsearch.common.Explicit;
-import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.Numbers;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.settings.Settings;
@@ -44,8 +43,6 @@ import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.Mapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
 import org.elasticsearch.index.mapper.ParseContext;
-import org.elasticsearch.index.query.QueryParseContext;
-
 import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
@@ -172,7 +169,7 @@ public class IntegerFieldMapper extends NumberFieldMapper {
         }
 
         @Override
-        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
+        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper) {
             return NumericRangeQuery.newIntRange(names().indexName(), numericPrecisionStep(),
                 lowerTerm == null ? null : parseValue(lowerTerm),
                 upperTerm == null ? null : parseValue(upperTerm),

core/src/main/java/org/elasticsearch/index/mapper/core/LongFieldMapper.java

@@ -31,7 +31,6 @@ import org.apache.lucene.util.BytesRefBuilder;
 import org.apache.lucene.util.NumericUtils;
 import org.elasticsearch.action.fieldstats.FieldStats;
 import org.elasticsearch.common.Explicit;
-import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.Numbers;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.settings.Settings;
@@ -44,8 +43,6 @@ import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.Mapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
 import org.elasticsearch.index.mapper.ParseContext;
-import org.elasticsearch.index.query.QueryParseContext;
-
 import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
@@ -170,7 +167,7 @@ public class LongFieldMapper extends NumberFieldMapper {
         }
 
         @Override
-        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
+        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper) {
             return NumericRangeQuery.newLongRange(names().indexName(), numericPrecisionStep(),
                 lowerTerm == null ? null : parseLongValue(lowerTerm),
                 upperTerm == null ? null : parseLongValue(upperTerm),

core/src/main/java/org/elasticsearch/index/mapper/core/ShortFieldMapper.java

@@ -31,7 +31,6 @@ import org.apache.lucene.util.BytesRefBuilder;
 import org.apache.lucene.util.NumericUtils;
 import org.elasticsearch.action.fieldstats.FieldStats;
 import org.elasticsearch.common.Explicit;
-import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.Numbers;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.settings.Settings;
@@ -44,8 +43,6 @@ import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.Mapper;
 import org.elasticsearch.index.mapper.MapperParsingException;
 import org.elasticsearch.index.mapper.ParseContext;
-import org.elasticsearch.index.query.QueryParseContext;
-
 import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
@@ -168,7 +165,7 @@ public class ShortFieldMapper extends NumberFieldMapper {
         }
 
         @Override
-        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
+        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper) {
             return NumericRangeQuery.newIntRange(names().indexName(), numericPrecisionStep(),
                 lowerTerm == null ? null : (int)parseValue(lowerTerm),
                 upperTerm == null ? null : (int)parseValue(upperTerm),

core/src/main/java/org/elasticsearch/index/mapper/ip/IpFieldMapper.java

@@ -29,7 +29,6 @@ import org.apache.lucene.util.BytesRef;
 import org.apache.lucene.util.BytesRefBuilder;
 import org.apache.lucene.util.NumericUtils;
 import org.elasticsearch.common.Explicit;
-import org.elasticsearch.common.Nullable;
 import org.elasticsearch.common.Numbers;
 import org.elasticsearch.common.Strings;
 import org.elasticsearch.common.settings.Settings;
@@ -47,8 +46,6 @@ import org.elasticsearch.index.mapper.ParseContext;
 import org.elasticsearch.index.mapper.core.LongFieldMapper;
 import org.elasticsearch.index.mapper.core.LongFieldMapper.CustomLongNumericField;
 import org.elasticsearch.index.mapper.core.NumberFieldMapper;
-import org.elasticsearch.index.query.QueryParseContext;
-
 import java.io.IOException;
 import java.util.Iterator;
 import java.util.List;
@@ -209,7 +206,7 @@ public class IpFieldMapper extends NumberFieldMapper {
         }
 
         @Override
-        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper, @Nullable QueryParseContext context) {
+        public Query rangeQuery(Object lowerTerm, Object upperTerm, boolean includeLower, boolean includeUpper) {
             return NumericRangeQuery.newLongRange(names().indexName(), numericPrecisionStep(),
                 lowerTerm == null ? null : parseValue(lowerTerm),
                 upperTerm == null ? null : parseValue(upperTerm),

core/src/main/java/org/elasticsearch/index/percolator/PercolatorQueriesRegistry.java

@@ -226,14 +226,6 @@ public class PercolatorQueriesRegistry extends AbstractIndexShardComponent imple
             }
         }
 
-        @Override
-        public void afterRemove(DocumentMapper mapper) {
-            if (PercolatorService.TYPE_NAME.equals(mapper.type())) {
-                disableRealTimePercolator();
-                clear();
-            }
-        }
-
     }
 
     private class ShardLifecycleListener extends IndicesLifecycle.Listener {

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

@@ -107,7 +107,7 @@ public class ExistsQueryBuilder extends AbstractQueryBuilder<ExistsQueryBuilder>
             }
             // if _field_names are not indexed, we need to go the slow way
             if (filter == null && fieldType != null) {
-                filter = fieldType.rangeQuery(null, null, true, true, parseContext);
+                filter = fieldType.rangeQuery(null, null, true, true);
             }
             if (filter == null) {
                 filter = new TermRangeQuery(field, null, null, true, true);

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

@@ -55,11 +55,11 @@ public class MissingQueryBuilder extends AbstractQueryBuilder<MissingQueryBuilde
     public MissingQueryBuilder(String fieldPattern) {
         this.fieldPattern = fieldPattern;
     }
-    
+
     public String fieldPattern() {
         return this.fieldPattern;
     }
-    
+
     /**
      * Should the missing filter automatically include fields with null value configured in the
      * mappings. Defaults to <tt>false</tt>.
@@ -159,7 +159,7 @@ public class MissingQueryBuilder extends AbstractQueryBuilder<MissingQueryBuilde
                 }
                 // if _field_names are not indexed, we need to go the slow way
                 if (filter == null && fieldType != null) {
-                    filter = fieldType.rangeQuery(null, null, true, true, parseContext);
+                    filter = fieldType.rangeQuery(null, null, true, true);
                 }
                 if (filter == null) {
                     filter = new TermRangeQuery(field, null, null, true, true);

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

@@ -256,14 +256,14 @@ public class RangeQueryBuilder extends AbstractQueryBuilder<RangeQueryBuilder> i
                 if (this.timeZone != null) {
                     dateTimeZone = DateTimeZone.forID(this.timeZone);
                 }
-                query = ((DateFieldMapper.DateFieldType) mapper).rangeQuery(from, to, includeLower, includeUpper, dateTimeZone, forcedDateParser, parseContext);
+                query = ((DateFieldMapper.DateFieldType) mapper).rangeQuery(from, to, includeLower, includeUpper, dateTimeZone, forcedDateParser);
             } else  {
                 if (timeZone != null) {
                     throw new QueryParsingException(parseContext, "[range] time_zone can not be applied to non date field ["
                             + fieldName + "]");
                 }
                 //LUCENE 4 UPGRADE Mapper#rangeQuery should use bytesref as well?
-                query = mapper.rangeQuery(from, to, includeLower, includeUpper, parseContext);
+                query = mapper.rangeQuery(from, to, includeLower, includeUpper);
             }
         } else {
             if (timeZone != null) {

core/src/main/java/org/elasticsearch/index/search/geo/IndexedGeoBoundingBoxQuery.java

@@ -45,16 +45,16 @@ public class IndexedGeoBoundingBoxQuery {
     private static Query westGeoBoundingBoxFilter(GeoPoint topLeft, GeoPoint bottomRight, GeoPointFieldMapper.GeoPointFieldType fieldType) {
         BooleanQuery filter = new BooleanQuery();
         filter.setMinimumNumberShouldMatch(1);
-        filter.add(fieldType.lonFieldType().rangeQuery(null, bottomRight.lon(), true, true, null), Occur.SHOULD);
-        filter.add(fieldType.lonFieldType().rangeQuery(topLeft.lon(), null, true, true, null), Occur.SHOULD);
-        filter.add(fieldType.latFieldType().rangeQuery(bottomRight.lat(), topLeft.lat(), true, true, null), Occur.MUST);
+        filter.add(fieldType.lonFieldType().rangeQuery(null, bottomRight.lon(), true, true), Occur.SHOULD);
+        filter.add(fieldType.lonFieldType().rangeQuery(topLeft.lon(), null, true, true), Occur.SHOULD);
+        filter.add(fieldType.latFieldType().rangeQuery(bottomRight.lat(), topLeft.lat(), true, true), Occur.MUST);
         return new ConstantScoreQuery(filter);
     }
 
     private static Query eastGeoBoundingBoxFilter(GeoPoint topLeft, GeoPoint bottomRight, GeoPointFieldMapper.GeoPointFieldType fieldType) {
         BooleanQuery filter = new BooleanQuery();
-        filter.add(fieldType.lonFieldType().rangeQuery(topLeft.lon(), bottomRight.lon(), true, true, null), Occur.MUST);
-        filter.add(fieldType.latFieldType().rangeQuery(bottomRight.lat(), topLeft.lat(), true, true, null), Occur.MUST);
+        filter.add(fieldType.lonFieldType().rangeQuery(topLeft.lon(), bottomRight.lon(), true, true), Occur.MUST);
+        filter.add(fieldType.latFieldType().rangeQuery(bottomRight.lat(), topLeft.lat(), true, true), Occur.MUST);
         return new ConstantScoreQuery(filter);
     }
 }

core/src/main/java/org/elasticsearch/index/shard/IndexShard.java

@@ -21,7 +21,6 @@ package org.elasticsearch.index.shard;
 
 import com.google.common.base.Charsets;
 import com.google.common.base.Preconditions;
-
 import org.apache.lucene.codecs.PostingsFormat;
 import org.apache.lucene.index.CheckIndex;
 import org.apache.lucene.search.QueryCachingPolicy;
@@ -169,6 +168,7 @@ public class IndexShard extends AbstractIndexShardComponent {
     protected volatile IndexShardState state;
     protected final AtomicReference<Engine> currentEngineReference = new AtomicReference<>();
     protected final EngineFactory engineFactory;
+    private final IndexSearcherWrappingService wrappingService;
 
     @Nullable
     private RecoveryState recoveryState;
@@ -198,12 +198,13 @@ public class IndexShard extends AbstractIndexShardComponent {
                       IndicesQueryCache indicesQueryCache, ShardPercolateService shardPercolateService, CodecService codecService,
                       ShardTermVectorsService termVectorsService, IndexFieldDataService indexFieldDataService, IndexService indexService,
                       @Nullable IndicesWarmer warmer, SnapshotDeletionPolicy deletionPolicy, SimilarityService similarityService, EngineFactory factory,
-                      ClusterService clusterService, ShardPath path, BigArrays bigArrays) {
+                      ClusterService clusterService, ShardPath path, BigArrays bigArrays, IndexSearcherWrappingService wrappingService) {
         super(shardId, indexSettingsService.getSettings());
         this.codecService = codecService;
         this.warmer = warmer;
         this.deletionPolicy = deletionPolicy;
         this.similarityService = similarityService;
+        this.wrappingService = wrappingService;
         Preconditions.checkNotNull(store, "Store must be provided to the index shard");
         Preconditions.checkNotNull(deletionPolicy, "Snapshot deletion policy must be provided to the index shard");
         this.engineFactory = factory;
@@ -337,14 +338,16 @@ public class IndexShard extends AbstractIndexShardComponent {
         if (!newRouting.shardId().equals(shardId())) {
             throw new IllegalArgumentException("Trying to set a routing entry with shardId [" + newRouting.shardId() + "] on a shard with shardId [" + shardId() + "]");
         }
+        if ((currentRouting == null || newRouting.isSameAllocation(currentRouting)) == false) {
+            throw new IllegalArgumentException("Trying to set a routing entry with a different allocation. Current " + currentRouting + ", new " + newRouting);
+        }
         try {
             if (currentRouting != null) {
-                assert newRouting.version() > currentRouting.version() : "expected: " + newRouting.version() + " > " + currentRouting.version();
                 if (!newRouting.primary() && currentRouting.primary()) {
                     logger.warn("suspect illegal state: trying to move shard from primary mode to replica mode");
                 }
-                // if its the same routing, return
-                if (currentRouting.equals(newRouting)) {
+                // if its the same routing except for some metadata info, return
+                if (currentRouting.equalsIgnoringMetaData(newRouting)) {
                     this.shardRouting = newRouting; // might have a new version
                     return;
                 }
@@ -723,12 +726,12 @@ public class IndexShard extends AbstractIndexShardComponent {
 
     public org.apache.lucene.util.Version minimumCompatibleVersion() {
         org.apache.lucene.util.Version luceneVersion = null;
-        for(Segment segment : engine().segments(false)) {
+        for (Segment segment : engine().segments(false)) {
             if (luceneVersion == null || luceneVersion.onOrAfter(segment.getVersion())) {
                 luceneVersion = segment.getVersion();
             }
         }
-        return luceneVersion == null ?  Version.indexCreated(indexSettings).luceneVersion : luceneVersion;
+        return luceneVersion == null ? Version.indexCreated(indexSettings).luceneVersion : luceneVersion;
     }
 
     public SnapshotIndexCommit snapshotIndex(boolean flushFirst) throws EngineException {
@@ -1113,7 +1116,7 @@ public class IndexShard extends AbstractIndexShardComponent {
                 }
 
                 final int maxMergeCount = settings.getAsInt(MergeSchedulerConfig.MAX_MERGE_COUNT, mergeSchedulerConfig.getMaxMergeCount());
-                if (maxMergeCount !=  mergeSchedulerConfig.getMaxMergeCount()) {
+                if (maxMergeCount != mergeSchedulerConfig.getMaxMergeCount()) {
                     logger.info("updating [{}] from [{}] to [{}]", MergeSchedulerConfig.MAX_MERGE_COUNT, mergeSchedulerConfig.getMaxMergeCount(), maxMergeCount);
                     mergeSchedulerConfig.setMaxMergeCount(maxMergeCount);
                     change = true;
@@ -1360,7 +1363,7 @@ public class IndexShard extends AbstractIndexShardComponent {
         };
         return new EngineConfig(shardId,
                 threadPool, indexingService, indexSettingsService.indexSettings(), warmer, store, deletionPolicy, mergePolicyConfig.getMergePolicy(), mergeSchedulerConfig,
-                mapperService.indexAnalyzer(), similarityService.similarity(), codecService, failedEngineListener, translogRecoveryPerformer, indexCache.query(), cachingPolicy, translogConfig);
+                mapperService.indexAnalyzer(), similarityService.similarity(), codecService, failedEngineListener, translogRecoveryPerformer, indexCache.query(), cachingPolicy, wrappingService, translogConfig);
     }
 
     private static class IndexShardOperationCounter extends AbstractRefCounted {

core/src/main/java/org/elasticsearch/index/shard/IndexShardModule.java

@@ -21,7 +21,10 @@ package org.elasticsearch.index.shard;
 
 import org.elasticsearch.cluster.metadata.IndexMetaData;
 import org.elasticsearch.common.inject.AbstractModule;
+import org.elasticsearch.common.inject.multibindings.Multibinder;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.index.engine.IndexSearcherWrapper;
+import org.elasticsearch.index.engine.IndexSearcherWrappingService;
 import org.elasticsearch.index.engine.EngineFactory;
 import org.elasticsearch.index.engine.InternalEngineFactory;
 import org.elasticsearch.index.percolator.stats.ShardPercolateService;
@@ -73,6 +76,10 @@ public class IndexShardModule extends AbstractModule {
         bind(StoreRecoveryService.class).asEagerSingleton();
         bind(ShardPercolateService.class).asEagerSingleton();
         bind(ShardTermVectorsService.class).asEagerSingleton();
+        bind(IndexSearcherWrappingService.class).asEagerSingleton();
+        // this injects an empty set in IndexSearcherWrappingService, otherwise guice can't construct IndexSearcherWrappingService
+        Multibinder<IndexSearcherWrapper> multibinder
+                = Multibinder.newSetBinder(binder(), IndexSearcherWrapper.class);
     }
 
 

core/src/main/java/org/elasticsearch/index/shard/ShadowIndexShard.java

@@ -28,6 +28,7 @@ import org.elasticsearch.index.aliases.IndexAliasesService;
 import org.elasticsearch.index.cache.IndexCache;
 import org.elasticsearch.index.codec.CodecService;
 import org.elasticsearch.index.deletionpolicy.SnapshotDeletionPolicy;
+import org.elasticsearch.index.engine.IndexSearcherWrappingService;
 import org.elasticsearch.index.engine.Engine;
 import org.elasticsearch.index.engine.EngineConfig;
 import org.elasticsearch.index.engine.EngineFactory;
@@ -66,13 +67,13 @@ public final class ShadowIndexShard extends IndexShard {
                             IndexService indexService, @Nullable IndicesWarmer warmer,
                             SnapshotDeletionPolicy deletionPolicy, SimilarityService similarityService,
                             EngineFactory factory, ClusterService clusterService,
-                            ShardPath path, BigArrays bigArrays) throws IOException {
+                            ShardPath path, BigArrays bigArrays, IndexSearcherWrappingService wrappingService) throws IOException {
         super(shardId, indexSettingsService, indicesLifecycle, store, storeRecoveryService,
                 threadPool, mapperService, queryParserService, indexCache, indexAliasesService,
                 indicesQueryCache, shardPercolateService, codecService,
                 termVectorsService, indexFieldDataService, indexService,
                 warmer, deletionPolicy, similarityService,
-                factory, clusterService, path, bigArrays);
+                factory, clusterService, path, bigArrays, wrappingService);
     }
 
     /**

core/src/main/java/org/elasticsearch/index/shard/ShardUtils.java

@@ -63,7 +63,11 @@ public final class ShardUtils {
             if (reader instanceof ElasticsearchLeafReader) {
                 return (ElasticsearchLeafReader) reader;
             } else {
-                return getElasticsearchLeafReader(FilterLeafReader.unwrap(reader));
+                // We need to use FilterLeafReader#getDelegate and not FilterLeafReader#unwrap, because
+                // If there are multiple levels of filtered leaf readers then with the unwrap() method it immediately
+                // returns the most inner leaf reader and thus skipping of over any other filtered leaf reader that
+                // may be instance of ElasticsearchLeafReader. This can cause us to miss the shardId.
+                return getElasticsearchLeafReader(((FilterLeafReader) reader).getDelegate());
             }
         }
         return null;

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

@@ -507,7 +507,7 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
                 // for example: a shard that recovers from one node and now needs to recover to another node,
                 //              or a replica allocated and then allocating a primary because the primary failed on another node
                 boolean shardHasBeenRemoved = false;
-                if (currentRoutingEntry.initializing() && shardRouting.initializing() && !currentRoutingEntry.equals(shardRouting)) {
+                if (currentRoutingEntry.isSameAllocation(shardRouting) == false) {
                     logger.debug("[{}][{}] removing shard (different instance of it allocated on this node, current [{}], global [{}])", shardRouting.index(), shardRouting.id(), currentRoutingEntry, shardRouting);
                     // closing the shard will also cancel any ongoing recovery.
                     indexService.removeShard(shardRouting.id(), "removing shard (different instance of it allocated on this node)");
@@ -526,22 +526,19 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent<Indic
                         // closing the shard will also cancel any ongoing recovery.
                         indexService.removeShard(shardRouting.id(), "removing shard (recovery source node changed)");
                         shardHasBeenRemoved = true;
-
                     }
                 }
-                if (shardHasBeenRemoved == false && (shardRouting.equals(indexShard.routingEntry()) == false || shardRouting.version() > indexShard.routingEntry().version())) {
-                    if (shardRouting.primary() && indexShard.routingEntry().primary() == false && shardRouting.initializing() && indexShard.allowsPrimaryPromotion() == false) {
-                        logger.debug("{} reinitialize shard on primary promotion", indexShard.shardId());
-                        indexService.removeShard(shardId, "promoted to primary");
-                    } else {
-                        // if we happen to remove the shardRouting by id above we don't need to jump in here!
-                        indexShard.updateRoutingEntry(shardRouting, event.state().blocks().disableStatePersistence() == false);
-                    }
+
+                if (shardHasBeenRemoved == false) {
+                    // shadow replicas do not support primary promotion. The master would reinitialize the shard, giving it a new allocation, meaning we should be there.
+                    assert (shardRouting.primary() && currentRoutingEntry.primary() == false) == false || indexShard.allowsPrimaryPromotion() :
+                            "shard for doesn't support primary promotion but master promoted it with changing allocation. New routing " + shardRouting + ", current routing " + currentRoutingEntry;
+                    indexShard.updateRoutingEntry(shardRouting, event.state().blocks().disableStatePersistence() == false);
                 }
             }
 
             if (shardRouting.initializing()) {
-                applyInitializingShard(event.state(),indexMetaData, shardRouting);
+                applyInitializingShard(event.state(), indexMetaData, shardRouting);
             }
         }
     }

core/src/main/java/org/elasticsearch/indices/ttl/IndicesTTLService.java

@@ -196,7 +196,7 @@ public class IndicesTTLService extends AbstractLifecycleComponent<IndicesTTLServ
 
     private void purgeShards(List<IndexShard> shardsToPurge) {
         for (IndexShard shardToPurge : shardsToPurge) {
-            Query query = shardToPurge.indexService().mapperService().smartNameFieldType(TTLFieldMapper.NAME).rangeQuery(null, System.currentTimeMillis(), false, true, null);
+            Query query = shardToPurge.indexService().mapperService().smartNameFieldType(TTLFieldMapper.NAME).rangeQuery(null, System.currentTimeMillis(), false, true);
             Engine.Searcher searcher = shardToPurge.acquireSearcher("indices_ttl");
             try {
                 logger.debug("[{}][{}] purging shard", shardToPurge.routingEntry().index(), shardToPurge.routingEntry().id());

core/src/main/java/org/elasticsearch/node/internal/InternalSettingsPreparer.java

@@ -180,7 +180,7 @@ public class InternalSettingsPreparer {
 
     static Settings replacePromptPlaceholders(Settings settings, Terminal terminal) {
         UnmodifiableIterator<Map.Entry<String, String>> iter = settings.getAsMap().entrySet().iterator();
-        Settings.Builder builder = Settings.builder();
+        Settings.Builder builder = Settings.builder().classLoader(settings.getClassLoaderIfSet());
 
         while (iter.hasNext()) {
             Map.Entry<String, String> entry = iter.next();

core/src/main/java/org/elasticsearch/plugins/PluginInfo.java

@@ -19,6 +19,7 @@
 package org.elasticsearch.plugins;
 
 import org.elasticsearch.Version;
+import org.elasticsearch.bootstrap.JarHell;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.common.io.stream.StreamOutput;
 import org.elasticsearch.common.io.stream.Streamable;
@@ -110,12 +111,23 @@ public class PluginInfo implements Streamable, ToXContent {
             if (esVersion.equals(Version.CURRENT) == false) {
                 throw new IllegalArgumentException("Elasticsearch version [" + esVersionString + "] is too old for plugin [" + name + "]");
             }
+            String javaVersionString = props.getProperty("java.version");
+            if (javaVersionString == null) {
+                throw new IllegalArgumentException("Property [java.version] is missing for jvm plugin [" + name + "]");
+            }
+            JarHell.checkJavaVersion(name, javaVersionString);
             isolated = Boolean.parseBoolean(props.getProperty("isolated", "true"));
             classname = props.getProperty("classname");
             if (classname == null) {
                 throw new IllegalArgumentException("Property [classname] is missing for jvm plugin [" + name + "]");
             }
         }
+        
+        if (site) {
+            if (!Files.exists(dir.resolve("_site"))) {
+                throw new IllegalArgumentException("Plugin [" + name + "] is a site plugin but has no '_site/' directory");
+            }
+        }
 
         return new PluginInfo(name, description, site, version, jvm, classname, isolated);
     }

core/src/main/java/org/elasticsearch/plugins/PluginManager.java

@@ -22,6 +22,7 @@ package org.elasticsearch.plugins;
 import com.google.common.base.Strings;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Iterators;
+
 import org.apache.lucene.util.IOUtils;
 import org.elasticsearch.ElasticsearchTimeoutException;
 import org.elasticsearch.ExceptionsHelper;
@@ -32,6 +33,7 @@ import org.elasticsearch.common.http.client.HttpDownloadHelper;
 import org.elasticsearch.common.io.FileSystemUtils;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.env.Environment;
+import org.elasticsearch.plugins.PluginsService.Bundle;
 
 import java.io.IOException;
 import java.io.OutputStream;
@@ -98,14 +100,6 @@ public class PluginManager {
         if (name == null) {
             throw new IllegalArgumentException("plugin name must be supplied with install [name].");
         }
-        HttpDownloadHelper downloadHelper = new HttpDownloadHelper();
-        boolean downloaded = false;
-        HttpDownloadHelper.DownloadProgress progress;
-        if (outputMode == OutputMode.SILENT) {
-            progress = new HttpDownloadHelper.NullProgress();
-        } else {
-            progress = new HttpDownloadHelper.VerboseProgress(terminal.writer());
-        }
 
         if (!Files.exists(environment.pluginsFile())) {
             terminal.println("Plugins directory [%s] does not exist. Creating...", environment.pluginsFile());
@@ -119,11 +113,20 @@ public class PluginManager {
         PluginHandle pluginHandle = PluginHandle.parse(name);
         checkForForbiddenName(pluginHandle.name);
 
-        Path pluginFile = pluginHandle.distroFile(environment);
-        // extract the plugin
-        final Path extractLocation = pluginHandle.extractedDir(environment);
-        if (Files.exists(extractLocation)) {
-            throw new IOException("plugin directory " + extractLocation.toAbsolutePath() + " already exists. To update the plugin, uninstall it first using remove " + name + " command");
+        Path pluginFile = download(pluginHandle, terminal);
+        extract(pluginHandle, terminal, pluginFile);
+    }
+
+    private Path download(PluginHandle pluginHandle, Terminal terminal) throws IOException {
+        Path pluginFile = pluginHandle.newDistroFile(environment);
+
+        HttpDownloadHelper downloadHelper = new HttpDownloadHelper();
+        boolean downloaded = false;
+        HttpDownloadHelper.DownloadProgress progress;
+        if (outputMode == OutputMode.SILENT) {
+            progress = new HttpDownloadHelper.NullProgress();
+        } else {
+            progress = new HttpDownloadHelper.VerboseProgress(terminal.writer());
         }
 
         // first, try directly from the URL provided
@@ -162,97 +165,44 @@ public class PluginManager {
         }
 
         if (!downloaded) {
+            // try to cleanup what we downloaded
+            IOUtils.deleteFilesIgnoringExceptions(pluginFile);
             throw new IOException("failed to download out of all possible locations..., use --verbose to get detailed information");
         }
+        return pluginFile;
+    }
 
-        // unzip plugin to a temp dir
-        Path tmp = unzipToTemporary(pluginFile);
-
-        // create list of current jars in classpath
-        final List<URL> jars = new ArrayList<>();
-        ClassLoader loader = PluginManager.class.getClassLoader();
-        if (loader instanceof URLClassLoader) {
-            Collections.addAll(jars, ((URLClassLoader) loader).getURLs());
+    private void extract(PluginHandle pluginHandle, Terminal terminal, Path pluginFile) throws IOException {
+        final Path extractLocation = pluginHandle.extractedDir(environment);
+        if (Files.exists(extractLocation)) {
+            throw new IOException("plugin directory " + extractLocation.toAbsolutePath() + " already exists. To update the plugin, uninstall it first using 'remove " + pluginHandle.name + "' command");
         }
 
-        // add any jars we find in the plugin to the list
-        Files.walkFileTree(tmp, new SimpleFileVisitor<Path>() {
-            @Override
-            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-                if (file.toString().endsWith(".jar")) {
-                    jars.add(file.toUri().toURL());
-                }
-                return FileVisitResult.CONTINUE;
-            }
-        });
+        // unzip plugin to a staging temp dir, named for the plugin
+        Path tmp = Files.createTempDirectory(environment.tmpFile(), null);
+        Path root = tmp.resolve(pluginHandle.name); 
+        unzipPlugin(pluginFile, root);
 
-        // check combined (current classpath + new jars to-be-added)
-        try {
-            JarHell.checkJarHell(jars.toArray(new URL[jars.size()]));
-        } catch (Exception ex) {
-            throw new RuntimeException(ex);
+        // find the actual root (in case its unzipped with extra directory wrapping)
+        root = findPluginRoot(root);
+
+        // read and validate the plugin descriptor
+        PluginInfo info = PluginInfo.readFromProperties(root);
+        terminal.println("%s", info);
+
+        // check for jar hell before any copying
+        if (info.isJvm()) {
+            jarHellCheck(root, info.isIsolated());
         }
 
+        // install plugin
+        FileSystemUtils.copyDirectoryRecursively(root, extractLocation);
+        terminal.println("Installed %s into %s", pluginHandle.name, extractLocation.toAbsolutePath());
+
         // cleanup
-        IOUtils.rm(tmp);
+        IOUtils.rm(tmp, pluginFile);
 
-        // TODO: we have a tmpdir made above, so avoid zipfilesystem
-        try (FileSystem zipFile = FileSystems.newFileSystem(pluginFile, null)) {
-            for (final Path root : zipFile.getRootDirectories() ) {
-                final Path[] topLevelFiles = FileSystemUtils.files(root);
-                //we check whether we need to remove the top-level folder while extracting
-                //sometimes (e.g. github) the downloaded archive contains a top-level folder which needs to be removed
-                final boolean stripTopLevelDirectory;
-                if (topLevelFiles.length == 1 && Files.isDirectory(topLevelFiles[0])) {
-                    // valid names if the zip has only one top level directory
-                    switch (topLevelFiles[0].getFileName().toString()) {
-                        case  "_site/":
-                        case  "bin/":
-                        case  "config/":
-                        case  "_dict/":
-                          stripTopLevelDirectory = false;
-                          break;
-                        default:
-                          stripTopLevelDirectory = true;
-                    }
-                } else {
-                    stripTopLevelDirectory = false;
-                }
-                Files.walkFileTree(root, new SimpleFileVisitor<Path>() {
-                    @Override
-                    public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
-                        Path target =  FileSystemUtils.append(extractLocation, file, stripTopLevelDirectory ? 1 : 0);
-                        Files.createDirectories(target);
-                        Files.copy(file, target, StandardCopyOption.REPLACE_EXISTING);
-                        return FileVisitResult.CONTINUE;
-                    }
-
-                });
-            }
-            terminal.println("Installed %s into %s", name, extractLocation.toAbsolutePath());
-        } catch (Exception e) {
-            terminal.printError("failed to extract plugin [%s]: %s", pluginFile, ExceptionsHelper.detailedMessage(e));
-            return;
-        } finally {
-            try {
-                Files.delete(pluginFile);
-            } catch (Exception ex) {
-                terminal.printError("Failed to delete plugin file %s %s", pluginFile, ex);
-            }
-        }
-
-        if (FileSystemUtils.hasExtensions(extractLocation, ".java")) {
-            terminal.printError("Plugin installation assumed to be site plugin, but contains source code, aborting installation...");
-            try {
-                IOUtils.rm(extractLocation);
-            } catch(Exception ex) {
-                terminal.printError("Failed to remove site plugin from path %s - %s", extractLocation, ex.getMessage());
-            }
-            throw new IllegalArgumentException("Plugin installation assumed to be site plugin, but contains source code, aborting installation.");
-        }
-
-        // It could potentially be a non explicit _site plugin
-        boolean potentialSitePlugin = true;
+        // take care of bin/ by moving and applying permissions if needed
         Path binFile = extractLocation.resolve("bin");
         if (Files.isDirectory(binFile)) {
             Path toLocation = pluginHandle.binDir(environment);
@@ -289,8 +239,7 @@ public class PluginManager {
             } else {
                 terminal.println(VERBOSE, "Skipping posix permissions - filestore doesn't support posix permission");
             }
-            terminal.println(VERBOSE, "Installed %s into %s", name, toLocation.toAbsolutePath());
-            potentialSitePlugin = false;
+            terminal.println(VERBOSE, "Installed %s into %s", pluginHandle.name, toLocation.toAbsolutePath());
         }
 
         Path configFile = extractLocation.resolve("config");
@@ -298,33 +247,68 @@ public class PluginManager {
             Path configDestLocation = pluginHandle.configDir(environment);
             terminal.println(VERBOSE, "Found config, moving to %s", configDestLocation.toAbsolutePath());
             moveFilesWithoutOverwriting(configFile, configDestLocation, ".new");
-            terminal.println(VERBOSE, "Installed %s into %s", name, configDestLocation.toAbsolutePath());
-            potentialSitePlugin = false;
-        }
-
-        // try and identify the plugin type, see if it has no .class or .jar files in it
-        // so its probably a _site, and it it does not have a _site in it, move everything to _site
-        if (!Files.exists(extractLocation.resolve("_site"))) {
-            if (potentialSitePlugin && !FileSystemUtils.hasExtensions(extractLocation, ".class", ".jar")) {
-                terminal.println(VERBOSE, "Identified as a _site plugin, moving to _site structure ...");
-                Path site = extractLocation.resolve("_site");
-                Path tmpLocation = environment.pluginsFile().resolve(extractLocation.getFileName() + ".tmp");
-                Files.move(extractLocation, tmpLocation);
-                Files.createDirectories(extractLocation);
-                Files.move(tmpLocation, site);
-                terminal.println(VERBOSE, "Installed " + name + " into " + site.toAbsolutePath());
-            }
+            terminal.println(VERBOSE, "Installed %s into %s", pluginHandle.name, configDestLocation.toAbsolutePath());
         }
     }
 
-    private Path unzipToTemporary(Path zip) throws IOException {
-        Path tmp = Files.createTempDirectory(environment.tmpFile(), null);
+    /** we check whether we need to remove the top-level folder while extracting
+     *  sometimes (e.g. github) the downloaded archive contains a top-level folder which needs to be removed
+     */
+    private Path findPluginRoot(Path dir) throws IOException {
+        if (Files.exists(dir.resolve(PluginInfo.ES_PLUGIN_PROPERTIES))) {
+            return dir;
+        } else {
+            final Path[] topLevelFiles = FileSystemUtils.files(dir);
+            if (topLevelFiles.length == 1 && Files.isDirectory(topLevelFiles[0])) {
+                Path subdir = topLevelFiles[0];
+                if (Files.exists(subdir.resolve(PluginInfo.ES_PLUGIN_PROPERTIES))) {
+                    return subdir;
+                }
+            }
+        }
+        throw new RuntimeException("Could not find plugin descriptor '" + PluginInfo.ES_PLUGIN_PROPERTIES + "' in plugin zip");
+    }
 
+    /** check a candidate plugin for jar hell before installing it */
+    private void jarHellCheck(Path candidate, boolean isolated) throws IOException {
+        // create list of current jars in classpath
+        final List<URL> jars = new ArrayList<>();
+        ClassLoader loader = PluginManager.class.getClassLoader();
+        if (loader instanceof URLClassLoader) {
+            Collections.addAll(jars, ((URLClassLoader) loader).getURLs());
+        }
+
+        // read existing bundles. this does some checks on the installation too.
+        List<Bundle> bundles = PluginsService.getPluginBundles(environment);
+
+        // if we aren't isolated, we need to jarhellcheck against any other non-isolated plugins
+        // thats always the first bundle
+        if (isolated == false) {
+            jars.addAll(bundles.get(0).urls);
+        }
+
+        // add plugin jars to the list
+        Path pluginJars[] = FileSystemUtils.files(candidate, "*.jar");
+        for (Path jar : pluginJars) {
+            jars.add(jar.toUri().toURL());
+        }
+
+        // check combined (current classpath + new jars to-be-added)
+        try {
+            JarHell.checkJarHell(jars.toArray(new URL[jars.size()]));
+        } catch (Exception ex) {
+            throw new RuntimeException(ex);
+        }
+    }
+
+    private void unzipPlugin(Path zip, Path target) throws IOException {
+        Files.createDirectories(target);
+        
         try (ZipInputStream zipInput = new ZipInputStream(Files.newInputStream(zip))) {
             ZipEntry entry;
             byte[] buffer = new byte[8192];
             while ((entry = zipInput.getNextEntry()) != null) {
-                Path targetFile = tmp.resolve(entry.getName());
+                Path targetFile = target.resolve(entry.getName());
 
                 // be on the safe side: do not rely on that directories are always extracted
                 // before their children (although this makes sense, but is it guaranteed?)
@@ -340,8 +324,6 @@ public class PluginManager {
                 zipInput.closeEntry();
             }
         }
-
-        return tmp;
     }
 
     public void removePlugin(String name, Terminal terminal) throws IOException {
@@ -363,17 +345,6 @@ public class PluginManager {
             }
             removed = true;
         }
-        pluginToDelete = pluginHandle.distroFile(environment);
-        if (Files.exists(pluginToDelete)) {
-            terminal.println(VERBOSE, "Removing: %s", pluginToDelete);
-            try {
-                Files.delete(pluginToDelete);
-            } catch (Exception ex) {
-                throw new IOException("Unable to remove " + pluginHandle.name + ". Check file permissions on " +
-                        pluginToDelete.toString(), ex);
-            }
-            removed = true;
-        }
         Path binLocation = pluginHandle.binDir(environment);
         if (Files.exists(binLocation)) {
             terminal.println(VERBOSE, "Removing: %s", binLocation);
@@ -482,8 +453,8 @@ public class PluginManager {
             }
         }
 
-        Path distroFile(Environment env) {
-            return env.pluginsFile().resolve(name + ".zip");
+        Path newDistroFile(Environment env) throws IOException {
+            return Files.createTempFile(env.tmpFile(), name, ".zip");
         }
 
         Path extractedDir(Environment env) {

core/src/main/java/org/elasticsearch/rest/action/admin/indices/analyze/RestAnalyzeAction.java

@@ -60,7 +60,6 @@ public class RestAnalyzeAction extends BaseRestHandler {
 
         AnalyzeRequest analyzeRequest = new AnalyzeRequest(request.param("index"));
         analyzeRequest.text(texts);
-        analyzeRequest.preferLocal(request.paramAsBoolean("prefer_local", analyzeRequest.preferLocalShard()));
         analyzeRequest.analyzer(request.param("analyzer"));
         analyzeRequest.field(request.param("field"));
         analyzeRequest.tokenizer(request.param("tokenizer"));
@@ -93,8 +92,6 @@ public class RestAnalyzeAction extends BaseRestHandler {
                 while ((token = parser.nextToken()) != XContentParser.Token.END_OBJECT) {
                     if (token == XContentParser.Token.FIELD_NAME) {
                         currentFieldName = parser.currentName();
-                    } else if ("prefer_local".equals(currentFieldName) && token == XContentParser.Token.VALUE_BOOLEAN) {
-                        analyzeRequest.preferLocal(parser.booleanValue());
                     } else if ("text".equals(currentFieldName) && token == XContentParser.Token.VALUE_STRING) {
                         analyzeRequest.text(parser.text());
                     } else if ("text".equals(currentFieldName) && token == XContentParser.Token.START_ARRAY) {

core/src/main/java/org/elasticsearch/watcher/ResourceWatcherService.java

@@ -50,7 +50,7 @@ public class ResourceWatcherService extends AbstractLifecycleComponent<ResourceW
         /**
          * Defaults to 30 seconds
          */
-        MEDIUM(TimeValue.timeValueSeconds(25)),
+        MEDIUM(TimeValue.timeValueSeconds(30)),
 
         /**
          * Defaults to 60 seconds

core/src/test/java/org/elasticsearch/action/termvectors/TermVectorsUnitTests.java

@@ -302,8 +302,8 @@ public class TermVectorsUnitTests extends ElasticsearchTestCase {
         request = new MultiTermVectorsRequest();
         request.add(new TermVectorsRequest(), bytes);
         checkParsedParameters(request);
-        
     }
+
     void checkParsedParameters(MultiTermVectorsRequest request) {
         Set<String> ids = new HashSet<>();
         ids.add("1");
@@ -324,5 +324,31 @@ public class TermVectorsUnitTests extends ElasticsearchTestCase {
             assertThat(singleRequest.selectedFields(), equalTo(fields));
         }
     }
-    
+
+    @Test // issue #12311
+    public void testMultiParserFilter() throws Exception {
+        byte[] data = Streams.copyToBytesFromClasspath("/org/elasticsearch/action/termvectors/multiRequest3.json");
+        BytesReference bytes = new BytesArray(data);
+        MultiTermVectorsRequest request = new MultiTermVectorsRequest();
+        request.add(new TermVectorsRequest(), bytes);
+        checkParsedFilterParameters(request);
+    }
+
+    void checkParsedFilterParameters(MultiTermVectorsRequest multiRequest) {
+        int id = 1;
+        for (TermVectorsRequest request : multiRequest.requests) {
+            assertThat(request.index(), equalTo("testidx"));
+            assertThat(request.type(), equalTo("test"));
+            assertThat(request.id(), equalTo(id+""));
+            assertNotNull(request.filterSettings());
+            assertThat(request.filterSettings().maxNumTerms, equalTo(20));
+            assertThat(request.filterSettings().minTermFreq, equalTo(1));
+            assertThat(request.filterSettings().maxTermFreq, equalTo(20));
+            assertThat(request.filterSettings().minDocFreq, equalTo(1));
+            assertThat(request.filterSettings().maxDocFreq, equalTo(20));
+            assertThat(request.filterSettings().minWordLength, equalTo(1));
+            assertThat(request.filterSettings().maxWordLength, equalTo(20));
+            id++;
+        }
+    }
 }

core/src/test/java/org/elasticsearch/action/termvectors/multiRequest3.json

@@ -0,0 +1,16 @@
+{
+   "ids": ["1","2"],
+   "parameters": {
+      "_index": "testidx",
+      "_type": "test",
+      "filter": {
+         "max_num_terms": 20,
+         "min_term_freq": 1,
+         "max_term_freq": 20,
+         "min_doc_freq": 1,
+         "max_doc_freq": 20,
+         "min_word_length": 1,
+         "max_word_length": 20
+      }
+   }
+}

core/src/test/java/org/elasticsearch/cluster/routing/ShardRoutingTests.java

@@ -23,6 +23,7 @@ import org.elasticsearch.Version;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
 import org.elasticsearch.cluster.metadata.MetaData;
+import org.elasticsearch.cluster.metadata.SnapshotId;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.io.stream.StreamInput;
 import org.elasticsearch.test.ElasticsearchTestCase;
@@ -48,6 +49,177 @@ public class ShardRoutingTests extends ElasticsearchTestCase {
         }
     }
 
+    public void testIsSameAllocation() {
+        ShardRouting unassignedShard0 = TestShardRouting.newShardRouting("test", 0, null, false, ShardRoutingState.UNASSIGNED, 1);
+        ShardRouting unassignedShard1 = TestShardRouting.newShardRouting("test", 1, null, false, ShardRoutingState.UNASSIGNED, 1);
+        ShardRouting initializingShard0 = TestShardRouting.newShardRouting("test", 0, "1", randomBoolean(), ShardRoutingState.INITIALIZING, 1);
+        ShardRouting initializingShard1 = TestShardRouting.newShardRouting("test", 1, "1", randomBoolean(), ShardRoutingState.INITIALIZING, 1);
+        ShardRouting startedShard0 = new ShardRouting(initializingShard0);
+        startedShard0.moveToStarted();
+        ShardRouting startedShard1 = new ShardRouting(initializingShard1);
+        startedShard1.moveToStarted();
+
+        // test identity
+        assertTrue(initializingShard0.isSameAllocation(initializingShard0));
+
+        // test same allocation different state
+        assertTrue(initializingShard0.isSameAllocation(startedShard0));
+
+        // test unassigned is false even to itself
+        assertFalse(unassignedShard0.isSameAllocation(unassignedShard0));
+
+        // test different shards/nodes/state
+        assertFalse(unassignedShard0.isSameAllocation(unassignedShard1));
+        assertFalse(unassignedShard0.isSameAllocation(initializingShard0));
+        assertFalse(unassignedShard0.isSameAllocation(initializingShard1));
+        assertFalse(unassignedShard0.isSameAllocation(startedShard1));
+    }
+
+    public void testIsSameShard() {
+        ShardRouting index1Shard0a = randomShardRouting("index1", 0);
+        ShardRouting index1Shard0b = randomShardRouting("index1", 0);
+        ShardRouting index1Shard1 = randomShardRouting("index1", 1);
+        ShardRouting index2Shard0 = randomShardRouting("index2", 0);
+        ShardRouting index2Shard1 = randomShardRouting("index2", 1);
+
+        assertTrue(index1Shard0a.isSameShard(index1Shard0a));
+        assertTrue(index1Shard0a.isSameShard(index1Shard0b));
+        assertFalse(index1Shard0a.isSameShard(index1Shard1));
+        assertFalse(index1Shard0a.isSameShard(index2Shard0));
+        assertFalse(index1Shard0a.isSameShard(index2Shard1));
+    }
+
+    private ShardRouting randomShardRouting(String index, int shard) {
+        ShardRoutingState state = randomFrom(ShardRoutingState.values());
+        return TestShardRouting.newShardRouting(index, shard, state == ShardRoutingState.UNASSIGNED ? null : "1", state != ShardRoutingState.UNASSIGNED && randomBoolean(), state, randomInt(5));
+    }
+
+    public void testIsSourceTargetRelocation() {
+        ShardRouting unassignedShard0 = TestShardRouting.newShardRouting("test", 0, null, false, ShardRoutingState.UNASSIGNED, 1);
+        ShardRouting initializingShard0 = TestShardRouting.newShardRouting("test", 0, "node1", randomBoolean(), ShardRoutingState.INITIALIZING, 1);
+        ShardRouting initializingShard1 = TestShardRouting.newShardRouting("test", 1, "node1", randomBoolean(), ShardRoutingState.INITIALIZING, 1);
+        ShardRouting startedShard0 = new ShardRouting(initializingShard0);
+        startedShard0.moveToStarted();
+        ShardRouting startedShard1 = new ShardRouting(initializingShard1);
+        startedShard1.moveToStarted();
+        ShardRouting sourceShard0a = new ShardRouting(startedShard0);
+        sourceShard0a.relocate("node2");
+        ShardRouting targetShard0a = sourceShard0a.buildTargetRelocatingShard();
+        ShardRouting sourceShard0b = new ShardRouting(startedShard0);
+        sourceShard0b.relocate("node2");
+        ShardRouting sourceShard1 = new ShardRouting(startedShard1);
+        sourceShard1.relocate("node2");
+
+        // test true scenarios
+        assertTrue(targetShard0a.isRelocationTargetOf(sourceShard0a));
+        assertTrue(sourceShard0a.isRelocationSourceOf(targetShard0a));
+
+        // test two shards are not mixed
+        assertFalse(targetShard0a.isRelocationTargetOf(sourceShard1));
+        assertFalse(sourceShard1.isRelocationSourceOf(targetShard0a));
+
+        // test two allocations are not mixed
+        assertFalse(targetShard0a.isRelocationTargetOf(sourceShard0b));
+        assertFalse(sourceShard0b.isRelocationSourceOf(targetShard0a));
+
+        // test different shard states
+        assertFalse(targetShard0a.isRelocationTargetOf(unassignedShard0));
+        assertFalse(sourceShard0a.isRelocationTargetOf(unassignedShard0));
+        assertFalse(unassignedShard0.isRelocationSourceOf(targetShard0a));
+        assertFalse(unassignedShard0.isRelocationSourceOf(sourceShard0a));
+
+        assertFalse(targetShard0a.isRelocationTargetOf(initializingShard0));
+        assertFalse(sourceShard0a.isRelocationTargetOf(initializingShard0));
+        assertFalse(initializingShard0.isRelocationSourceOf(targetShard0a));
+        assertFalse(initializingShard0.isRelocationSourceOf(sourceShard0a));
+
+        assertFalse(targetShard0a.isRelocationTargetOf(startedShard0));
+        assertFalse(sourceShard0a.isRelocationTargetOf(startedShard0));
+        assertFalse(startedShard0.isRelocationSourceOf(targetShard0a));
+        assertFalse(startedShard0.isRelocationSourceOf(sourceShard0a));
+    }
+
+    public void testEqualsIgnoringVersion() {
+        ShardRouting routing = randomShardRouting("test", 0);
+
+        ShardRouting otherRouting = new ShardRouting(routing);
+
+        assertTrue("expected equality\nthis  " + routing + ",\nother " + otherRouting, routing.equalsIgnoringMetaData(otherRouting));
+        otherRouting = new ShardRouting(routing, 1);
+        assertTrue("expected equality\nthis  " + routing + ",\nother " + otherRouting, routing.equalsIgnoringMetaData(otherRouting));
+
+
+        otherRouting = new ShardRouting(routing);
+        Integer[] changeIds = new Integer[]{0, 1, 2, 3, 4, 5, 6};
+        for (int changeId : randomSubsetOf(randomIntBetween(1, changeIds.length), changeIds)) {
+            switch (changeId) {
+                case 0:
+                    // change index
+                    otherRouting = TestShardRouting.newShardRouting(otherRouting.index() + "a", otherRouting.id(), otherRouting.currentNodeId(), otherRouting.relocatingNodeId(),
+                            otherRouting.restoreSource(), otherRouting.primary(), otherRouting.state(), otherRouting.version(), otherRouting.unassignedInfo());
+                    break;
+                case 1:
+                    // change shard id
+                    otherRouting = TestShardRouting.newShardRouting(otherRouting.index(), otherRouting.id() + 1, otherRouting.currentNodeId(), otherRouting.relocatingNodeId(),
+                            otherRouting.restoreSource(), otherRouting.primary(), otherRouting.state(), otherRouting.version(), otherRouting.unassignedInfo());
+                    break;
+                case 2:
+                    // change current node
+                    otherRouting = TestShardRouting.newShardRouting(otherRouting.index(), otherRouting.id(), otherRouting.currentNodeId() == null ? "1" : otherRouting.currentNodeId() + "_1", otherRouting.relocatingNodeId(),
+                            otherRouting.restoreSource(), otherRouting.primary(), otherRouting.state(), otherRouting.version(), otherRouting.unassignedInfo());
+                    break;
+                case 3:
+                    // change relocating node
+                    otherRouting = TestShardRouting.newShardRouting(otherRouting.index(), otherRouting.id(), otherRouting.currentNodeId(),
+                            otherRouting.relocatingNodeId() == null ? "1" : otherRouting.relocatingNodeId() + "_1",
+                            otherRouting.restoreSource(), otherRouting.primary(), otherRouting.state(), otherRouting.version(), otherRouting.unassignedInfo());
+                    break;
+                case 4:
+                    // change restore source
+                    otherRouting = TestShardRouting.newShardRouting(otherRouting.index(), otherRouting.id(), otherRouting.currentNodeId(), otherRouting.relocatingNodeId(),
+                            otherRouting.restoreSource() == null ? new RestoreSource(new SnapshotId("test", "s1"), Version.CURRENT, "test") :
+                                    new RestoreSource(otherRouting.restoreSource().snapshotId(), Version.CURRENT, otherRouting.index() + "_1"),
+                            otherRouting.primary(), otherRouting.state(), otherRouting.version(), otherRouting.unassignedInfo());
+                    break;
+                case 5:
+                    // change primary flag
+                    otherRouting = TestShardRouting.newShardRouting(otherRouting.index(), otherRouting.id(), otherRouting.currentNodeId(), otherRouting.relocatingNodeId(),
+                            otherRouting.restoreSource(), otherRouting.primary() == false, otherRouting.state(), otherRouting.version(), otherRouting.unassignedInfo());
+                    break;
+                case 6:
+                    // change state
+                    ShardRoutingState newState;
+                    do {
+                        newState = randomFrom(ShardRoutingState.values());
+                    } while (newState == otherRouting.state());
+
+                    UnassignedInfo unassignedInfo = otherRouting.unassignedInfo();
+                    if (unassignedInfo == null && (newState == ShardRoutingState.UNASSIGNED || newState == ShardRoutingState.INITIALIZING)) {
+                        unassignedInfo = new UnassignedInfo(UnassignedInfo.Reason.INDEX_CREATED, "test");
+                    }
+
+                    otherRouting = TestShardRouting.newShardRouting(otherRouting.index(), otherRouting.id(), otherRouting.currentNodeId(), otherRouting.relocatingNodeId(),
+                            otherRouting.restoreSource(), otherRouting.primary(), newState, otherRouting.version(), unassignedInfo);
+                    break;
+            }
+
+            if (randomBoolean()) {
+                // change version
+                otherRouting = new ShardRouting(otherRouting, otherRouting.version() + 1);
+            }
+
+            if (randomBoolean()) {
+                // change unassigned info
+                otherRouting = TestShardRouting.newShardRouting(otherRouting.index(), otherRouting.id(), otherRouting.currentNodeId(), otherRouting.relocatingNodeId(),
+                        otherRouting.restoreSource(), otherRouting.primary(), otherRouting.state(), otherRouting.version(),
+                        otherRouting.unassignedInfo() == null ? new UnassignedInfo(UnassignedInfo.Reason.INDEX_CREATED, "test") :
+                                new UnassignedInfo(UnassignedInfo.Reason.INDEX_CREATED, otherRouting.unassignedInfo().getMessage() + "_1"));
+            }
+
+            logger.debug("comparing\nthis  {} to\nother {}", routing, otherRouting);
+            assertFalse("expected non-equality\nthis  " + routing + ",\nother " + otherRouting, routing.equalsIgnoringMetaData(otherRouting));
+        }
+    }
 
     public void testFrozenOnRoutingTable() {
         MetaData metaData = MetaData.builder()

core/src/test/java/org/elasticsearch/cluster/routing/TestShardRouting.java

@@ -19,6 +19,8 @@
 
 package org.elasticsearch.cluster.routing;
 
+import org.elasticsearch.test.ElasticsearchTestCase;
+
 /**
  * A helper that allows to create shard routing instances within tests, while not requiring to expose
  * different simplified constructors on the ShardRouting itself.
@@ -26,19 +28,19 @@ package org.elasticsearch.cluster.routing;
 public class TestShardRouting {
 
     public static ShardRouting newShardRouting(String index, int shardId, String currentNodeId, boolean primary, ShardRoutingState state, long version) {
-        return new ShardRouting(index, shardId, currentNodeId, null, null, primary, state, version, null, buildAllocationId(state), true);
+        return new ShardRouting(index, shardId, currentNodeId, null, null, primary, state, version, buildUnassignedInfo(state), buildAllocationId(state), true);
     }
 
     public static ShardRouting newShardRouting(String index, int shardId, String currentNodeId, String relocatingNodeId, boolean primary, ShardRoutingState state, long version) {
-        return new ShardRouting(index, shardId, currentNodeId, relocatingNodeId, null, primary, state, version, null, buildAllocationId(state), true);
+        return new ShardRouting(index, shardId, currentNodeId, relocatingNodeId, null, primary, state, version, buildUnassignedInfo(state), buildAllocationId(state), true);
     }
 
     public static ShardRouting newShardRouting(String index, int shardId, String currentNodeId, String relocatingNodeId, boolean primary, ShardRoutingState state, AllocationId allocationId, long version) {
-        return new ShardRouting(index, shardId, currentNodeId, relocatingNodeId, null, primary, state, version, null, allocationId, true);
+        return new ShardRouting(index, shardId, currentNodeId, relocatingNodeId, null, primary, state, version, buildUnassignedInfo(state), allocationId, true);
     }
 
     public static ShardRouting newShardRouting(String index, int shardId, String currentNodeId, String relocatingNodeId, RestoreSource restoreSource, boolean primary, ShardRoutingState state, long version) {
-        return new ShardRouting(index, shardId, currentNodeId, relocatingNodeId, restoreSource, primary, state, version, null, buildAllocationId(state), true);
+        return new ShardRouting(index, shardId, currentNodeId, relocatingNodeId, restoreSource, primary, state, version, buildUnassignedInfo(state), buildAllocationId(state), true);
     }
 
     public static ShardRouting newShardRouting(String index, int shardId, String currentNodeId,
@@ -61,4 +63,17 @@ public class TestShardRouting {
                 throw new IllegalStateException("illegal state");
         }
     }
+
+    private static UnassignedInfo buildUnassignedInfo(ShardRoutingState state) {
+        switch (state) {
+            case UNASSIGNED:
+            case INITIALIZING:
+                return new UnassignedInfo(ElasticsearchTestCase.randomFrom(UnassignedInfo.Reason.values()), "auto generated for test");
+            case STARTED:
+            case RELOCATING:
+                return null;
+            default:
+                throw new IllegalStateException("illegal state");
+        }
+    }
 }

core/src/test/java/org/elasticsearch/cluster/routing/UnassignedInfoTests.java

@@ -60,7 +60,8 @@ public class UnassignedInfoTests extends ElasticsearchAllocationTestCase {
                 UnassignedInfo.Reason.ALLOCATION_FAILED,
                 UnassignedInfo.Reason.NODE_LEFT,
                 UnassignedInfo.Reason.REROUTE_CANCELLED,
-                UnassignedInfo.Reason.REINITIALIZED};
+                UnassignedInfo.Reason.REINITIALIZED,
+                UnassignedInfo.Reason.REALLOCATED_REPLICA};
         for (int i = 0; i < order.length; i++) {
             assertThat(order[i].ordinal(), equalTo(i));
         }

core/src/test/java/org/elasticsearch/gateway/ReplicaShardAllocatorTests.java

@@ -219,6 +219,39 @@ public class ReplicaShardAllocatorTests extends ElasticsearchAllocationTestCase
         assertThat(allocation.routingNodes().shardsWithState(ShardRoutingState.INITIALIZING).get(0).currentNodeId(), equalTo(node2.id()));
     }
 
+    @Test
+    public void testCancelRecoveryBetterSyncId() {
+        RoutingAllocation allocation = onePrimaryOnNode1And1ReplicaRecovering(yesAllocationDeciders());
+        testAllocator.addData(node1, true, "MATCH", new StoreFileMetaData("file1", 10, "MATCH_CHECKSUM"))
+                .addData(node2, false, "NO_MATCH", new StoreFileMetaData("file1", 10, "MATCH_CHECKSUM"))
+                .addData(node3, false, "MATCH", new StoreFileMetaData("file1", 10, "MATCH_CHECKSUM"));
+        boolean changed = testAllocator.processExistingRecoveries(allocation);
+        assertThat(changed, equalTo(true));
+        assertThat(allocation.routingNodes().shardsWithState(ShardRoutingState.UNASSIGNED).size(), equalTo(1));
+        assertThat(allocation.routingNodes().shardsWithState(ShardRoutingState.UNASSIGNED).get(0).shardId(), equalTo(shardId));
+    }
+
+    @Test
+    public void testNotCancellingRecoveryIfSyncedOnExistingRecovery() {
+        RoutingAllocation allocation = onePrimaryOnNode1And1ReplicaRecovering(yesAllocationDeciders());
+        testAllocator.addData(node1, true, "MATCH", new StoreFileMetaData("file1", 10, "MATCH_CHECKSUM"))
+                .addData(node2, false, "MATCH", new StoreFileMetaData("file1", 10, "MATCH_CHECKSUM"))
+                .addData(node3, false, randomBoolean() ? "MATCH" : "NO_MATCH", new StoreFileMetaData("file1", 10, "MATCH_CHECKSUM"));
+        boolean changed = testAllocator.processExistingRecoveries(allocation);
+        assertThat(changed, equalTo(false));
+        assertThat(allocation.routingNodes().shardsWithState(ShardRoutingState.UNASSIGNED).size(), equalTo(0));
+    }
+
+    @Test
+    public void testNotCancellingRecovery() {
+        RoutingAllocation allocation = onePrimaryOnNode1And1ReplicaRecovering(yesAllocationDeciders());
+        testAllocator.addData(node1, true, "MATCH", new StoreFileMetaData("file1", 10, "MATCH_CHECKSUM"))
+                .addData(node2, false, "MATCH", new StoreFileMetaData("file1", 10, "MATCH_CHECKSUM"));
+        boolean changed = testAllocator.processExistingRecoveries(allocation);
+        assertThat(changed, equalTo(false));
+        assertThat(allocation.routingNodes().shardsWithState(ShardRoutingState.UNASSIGNED).size(), equalTo(0));
+    }
+
     private RoutingAllocation onePrimaryOnNode1And1Replica(AllocationDeciders deciders) {
         return onePrimaryOnNode1And1Replica(deciders, Settings.EMPTY, UnassignedInfo.Reason.INDEX_CREATED);
     }
@@ -242,6 +275,25 @@ public class ReplicaShardAllocatorTests extends ElasticsearchAllocationTestCase
         return new RoutingAllocation(deciders, state.routingNodes(), state.nodes(), null);
     }
 
+    private RoutingAllocation onePrimaryOnNode1And1ReplicaRecovering(AllocationDeciders deciders) {
+        MetaData metaData = MetaData.builder()
+                .put(IndexMetaData.builder(shardId.getIndex()).settings(settings(Version.CURRENT)).numberOfShards(1).numberOfReplicas(0))
+                .build();
+        RoutingTable routingTable = RoutingTable.builder()
+                .add(IndexRoutingTable.builder(shardId.getIndex())
+                                .addIndexShard(new IndexShardRoutingTable.Builder(shardId)
+                                        .addShard(TestShardRouting.newShardRouting(shardId.getIndex(), shardId.getId(), node1.id(), true, ShardRoutingState.STARTED, 10))
+                                        .addShard(TestShardRouting.newShardRouting(shardId.getIndex(), shardId.getId(), node2.id(), false, ShardRoutingState.INITIALIZING, 10))
+                                        .build())
+                )
+                .build();
+        ClusterState state = ClusterState.builder(org.elasticsearch.cluster.ClusterName.DEFAULT)
+                .metaData(metaData)
+                .routingTable(routingTable)
+                .nodes(DiscoveryNodes.builder().put(node1).put(node2).put(node3)).build();
+        return new RoutingAllocation(deciders, state.routingNodes(), state.nodes(), null);
+    }
+
     class TestAllocator extends ReplicaShardAllocator {
 
         private Map<DiscoveryNode, TransportNodesListShardStoreMetaData.StoreFilesMetaData> data = null;

core/src/test/java/org/elasticsearch/index/engine/InternalEngineTests.java

@@ -236,15 +236,15 @@ public class InternalEngineTests extends ElasticsearchTestCase {
     }
 
 
-    protected InternalEngine createEngine(Store store, Path translogPath) {
-        return createEngine(defaultSettings, store, translogPath, new MergeSchedulerConfig(defaultSettings), newMergePolicy());
+    protected InternalEngine createEngine(Store store, Path translogPath, IndexSearcherWrapper... wrappers) {
+        return createEngine(defaultSettings, store, translogPath, new MergeSchedulerConfig(defaultSettings), newMergePolicy(), wrappers);
     }
 
-    protected InternalEngine createEngine(Settings indexSettings, Store store, Path translogPath, MergeSchedulerConfig mergeSchedulerConfig,  MergePolicy mergePolicy) {
-        return new InternalEngine(config(indexSettings, store, translogPath, mergeSchedulerConfig, mergePolicy), false);
+    protected InternalEngine createEngine(Settings indexSettings, Store store, Path translogPath, MergeSchedulerConfig mergeSchedulerConfig,  MergePolicy mergePolicy, IndexSearcherWrapper... wrappers) {
+        return new InternalEngine(config(indexSettings, store, translogPath, mergeSchedulerConfig, mergePolicy, wrappers), false);
     }
 
-    public EngineConfig config(Settings indexSettings, Store store, Path translogPath, MergeSchedulerConfig mergeSchedulerConfig, MergePolicy mergePolicy) {
+    public EngineConfig config(Settings indexSettings, Store store, Path translogPath, MergeSchedulerConfig mergeSchedulerConfig, MergePolicy mergePolicy, IndexSearcherWrapper... wrappers) {
         IndexWriterConfig iwc = newIndexWriterConfig();
         TranslogConfig translogConfig = new TranslogConfig(shardId, translogPath, indexSettings, Translog.Durabilty.REQUEST, BigArrays.NON_RECYCLING_INSTANCE, threadPool);
 
@@ -255,7 +255,7 @@ public class InternalEngineTests extends ElasticsearchTestCase {
             public void onFailedEngine(ShardId shardId, String reason, @Nullable Throwable t) {
                 // we don't need to notify anybody in this test
             }
-        }, new TranslogHandler(shardId.index().getName()), IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), translogConfig);
+        }, new TranslogHandler(shardId.index().getName()), IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), new IndexSearcherWrappingService(new HashSet<>(Arrays.asList(wrappers))), translogConfig);
 
         return config;
     }
@@ -493,6 +493,32 @@ public class InternalEngineTests extends ElasticsearchTestCase {
         ;
     }
 
+    @Test
+    public void testIndexSearcherWrapper() throws Exception {
+        final AtomicInteger counter = new AtomicInteger();
+        IndexSearcherWrapper wrapper = new IndexSearcherWrapper() {
+
+            @Override
+            public DirectoryReader wrap(DirectoryReader reader) {
+                counter.incrementAndGet();
+                return reader;
+            }
+
+            @Override
+            public IndexSearcher wrap(IndexSearcher searcher) throws EngineException {
+                counter.incrementAndGet();
+                return searcher;
+            }
+        };
+        Store store = createStore();
+        Path translog = createTempDir("translog-test");
+        InternalEngine engine = createEngine(store, translog, wrapper);
+        Engine.Searcher searcher = engine.acquireSearcher("test");
+        assertThat(counter.get(), equalTo(2));
+        searcher.close();
+        IOUtils.close(store, engine);
+    }
+
     @Test
     public void testSimpleOperations() throws Exception {
         Engine.Searcher searchResult = engine.acquireSearcher("test");
@@ -1985,7 +2011,7 @@ public class InternalEngineTests extends ElasticsearchTestCase {
         EngineConfig brokenConfig = new EngineConfig(shardId, threadPool, config.getIndexingService(), config.getIndexSettings()
                 , null, store, createSnapshotDeletionPolicy(), newMergePolicy(), config.getMergeSchedulerConfig(),
                 config.getAnalyzer(), config.getSimilarity(), new CodecService(shardId.index()), config.getFailedEngineListener()
-        , config.getTranslogRecoveryPerformer(), IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), translogConfig);
+        , config.getTranslogRecoveryPerformer(), IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), new IndexSearcherWrappingService(), translogConfig);
 
         try {
             new InternalEngine(brokenConfig, false);

core/src/test/java/org/elasticsearch/index/engine/ShadowEngineTests.java

@@ -47,7 +47,6 @@ import org.elasticsearch.index.mapper.ParseContext;
 import org.elasticsearch.index.mapper.ParsedDocument;
 import org.elasticsearch.index.mapper.internal.SourceFieldMapper;
 import org.elasticsearch.index.mapper.internal.UidFieldMapper;
-import org.elasticsearch.index.settings.IndexSettingsService;
 import org.elasticsearch.index.shard.MergeSchedulerConfig;
 import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.index.shard.ShardUtils;
@@ -226,7 +225,7 @@ public class ShadowEngineTests extends ElasticsearchTestCase {
             @Override
             public void onFailedEngine(ShardId shardId, String reason, @Nullable Throwable t) {
                 // we don't need to notify anybody in this test
-        }}, null, IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), translogConfig);
+        }}, null, IndexSearcher.getDefaultQueryCache(), IndexSearcher.getDefaultQueryCachingPolicy(), new IndexSearcherWrappingService(), translogConfig);
         return config;
     }
 

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

@@ -19,21 +19,21 @@
 
 package org.elasticsearch.index.fielddata;
 
-import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.index.cache.bitset.BitsetFilterCache;
-
 import org.apache.lucene.analysis.standard.StandardAnalyzer;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.Field;
+import org.apache.lucene.document.StringField;
 import org.apache.lucene.index.*;
 import org.apache.lucene.search.Filter;
 import org.apache.lucene.store.RAMDirectory;
 import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.index.IndexService;
+import org.elasticsearch.index.cache.bitset.BitsetFilterCache;
 import org.elasticsearch.index.mapper.ContentPath;
-import org.elasticsearch.index.mapper.FieldMapper;
 import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.Mapper.BuilderContext;
 import org.elasticsearch.index.mapper.MapperBuilders;
 import org.elasticsearch.index.mapper.MapperService;
-import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.mapper.internal.ParentFieldMapper;
 import org.elasticsearch.indices.fielddata.cache.IndicesFieldDataCache;
 import org.elasticsearch.test.ElasticsearchSingleNodeTest;
@@ -41,6 +41,9 @@ import org.junit.After;
 import org.junit.Before;
 
 import static org.elasticsearch.index.fielddata.IndexFieldData.XFieldComparatorSource.Nested;
+import static org.hamcrest.Matchers.equalTo;
+import static org.hamcrest.Matchers.not;
+import static org.hamcrest.Matchers.sameInstance;
 
 public abstract class AbstractFieldDataTests extends ElasticsearchSingleNodeTest {
 
@@ -130,4 +133,25 @@ public abstract class AbstractFieldDataTests extends ElasticsearchSingleNodeTest
         return new Nested(s.getBitDocIdSetFilter(parentFilter), s.getBitDocIdSetFilter(childFilter));
     }
 
+    public void testEmpty() throws Exception {
+        Document d = new Document();
+        d.add(new StringField("field", "value", Field.Store.NO));
+        writer.addDocument(d);
+        refreshReader();
+
+        IndexFieldData fieldData = getForField("non_existing_field");
+        int max = randomInt(7);
+        AtomicFieldData previous = null;
+        for (int i = 0; i < max; i++) {
+            AtomicFieldData current = fieldData.load(readerContext);
+            assertThat(current.ramBytesUsed(), equalTo(0l));
+            if (previous != null) {
+                assertThat(current, not(sameInstance(previous)));
+            }
+            previous = current;
+        }
+
+
+    }
+
 }

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

@@ -465,6 +465,11 @@ public class DuelFieldDataTests extends AbstractFieldDataTests {
         }
     }
 
+    @Override
+    public void testEmpty() throws Exception {
+        // No need to test empty usage here
+    }
+
     private int[] getNumbers(Random random, int margin) {
         if (random.nextInt(20) == 0) {
             int[] num = new int[1 + random.nextInt(10)];

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

@@ -180,5 +180,8 @@ public class FilterFieldDataTest extends AbstractFieldDataTests {
 
     }
 
-
+    @Override
+    public void testEmpty() throws Exception {
+        // No need to test empty usage here
+    }
 }

core/src/test/java/org/elasticsearch/index/mapper/date/SimpleDateMappingTests.java

@@ -61,7 +61,7 @@ import static org.elasticsearch.index.mapper.string.SimpleStringMappingTests.doc
 import static org.hamcrest.Matchers.*;
 
 public class SimpleDateMappingTests extends ElasticsearchSingleNodeTest {
-    
+
     public void testAutomaticDateParser() throws Exception {
         String mapping = XContentFactory.jsonBuilder().startObject().startObject("type")
                 .startObject("properties").endObject()
@@ -93,12 +93,12 @@ public class SimpleDateMappingTests extends ElasticsearchSingleNodeTest {
         fieldMapper = defaultMapper.mappers().smartNameFieldMapper("wrong_date3");
         assertThat(fieldMapper, instanceOf(StringFieldMapper.class));
     }
-    
+
     public void testParseLocal() {
         assertThat(Locale.GERMAN, equalTo(LocaleUtils.parse("de")));
         assertThat(Locale.GERMANY, equalTo(LocaleUtils.parse("de_DE")));
         assertThat(new Locale("de","DE","DE"), equalTo(LocaleUtils.parse("de_DE_DE")));
-        
+
         try {
             LocaleUtils.parse("de_DE_DE_DE");
             fail();
@@ -108,7 +108,7 @@ public class SimpleDateMappingTests extends ElasticsearchSingleNodeTest {
         assertThat(Locale.ROOT,  equalTo(LocaleUtils.parse("")));
         assertThat(Locale.ROOT,  equalTo(LocaleUtils.parse("ROOT")));
     }
-    
+
     public void testLocale() throws IOException {
         assumeFalse("Locals are buggy on JDK9EA", Constants.JRE_IS_MINIMUM_JAVA9 && systemPropertyAsBoolean("tests.security.manager", false));
         String mapping = XContentFactory.jsonBuilder()
@@ -169,7 +169,7 @@ public class SimpleDateMappingTests extends ElasticsearchSingleNodeTest {
     private void assertNumericTokensEqual(ParsedDocument doc, DocumentMapper defaultMapper, String fieldA, String fieldB) throws IOException {
         assertThat(doc.rootDoc().getField(fieldA).tokenStream(defaultMapper.mappers().indexAnalyzer(), null), notNullValue());
         assertThat(doc.rootDoc().getField(fieldB).tokenStream(defaultMapper.mappers().indexAnalyzer(), null), notNullValue());
-        
+
         TokenStream tokenStream = doc.rootDoc().getField(fieldA).tokenStream(defaultMapper.mappers().indexAnalyzer(), null);
         tokenStream.reset();
         NumericTermAttribute nta = tokenStream.addAttribute(NumericTermAttribute.class);
@@ -177,7 +177,7 @@ public class SimpleDateMappingTests extends ElasticsearchSingleNodeTest {
         while(tokenStream.incrementToken()) {
             values.add(nta.getRawValue());
         }
-        
+
         tokenStream = doc.rootDoc().getField(fieldB).tokenStream(defaultMapper.mappers().indexAnalyzer(), null);
         tokenStream.reset();
         nta = tokenStream.addAttribute(NumericTermAttribute.class);
@@ -223,7 +223,7 @@ public class SimpleDateMappingTests extends ElasticsearchSingleNodeTest {
         assertThat(doc.rootDoc().get("date_field"), equalTo("1262304000000"));
         assertThat(doc.rootDoc().get("date_field_x"), equalTo("2010-01-01"));
     }
-    
+
     public void testHourFormat() throws Exception {
         String mapping = XContentFactory.jsonBuilder().startObject().startObject("type")
                 .field("date_detection", false)
@@ -242,14 +242,14 @@ public class SimpleDateMappingTests extends ElasticsearchSingleNodeTest {
         NumericRangeQuery<Long> rangeQuery;
         try {
             SearchContext.setCurrent(new TestSearchContext());
-            rangeQuery = (NumericRangeQuery<Long>) defaultMapper.mappers().smartNameFieldMapper("date_field").fieldType().rangeQuery("10:00:00", "11:00:00", true, true, null).rewrite(null);
+            rangeQuery = (NumericRangeQuery<Long>) defaultMapper.mappers().smartNameFieldMapper("date_field").fieldType().rangeQuery("10:00:00", "11:00:00", true, true).rewrite(null);
         } finally {
             SearchContext.removeCurrent();
         }
         assertThat(rangeQuery.getMax(), equalTo(new DateTime(TimeValue.timeValueHours(11).millis(), DateTimeZone.UTC).getMillis()));
         assertThat(rangeQuery.getMin(), equalTo(new DateTime(TimeValue.timeValueHours(10).millis(), DateTimeZone.UTC).getMillis()));
     }
-    
+
     public void testDayWithoutYearFormat() throws Exception {
         String mapping = XContentFactory.jsonBuilder().startObject().startObject("type")
                 .field("date_detection", false)
@@ -268,14 +268,14 @@ public class SimpleDateMappingTests extends ElasticsearchSingleNodeTest {
         NumericRangeQuery<Long> rangeQuery;
         try {
             SearchContext.setCurrent(new TestSearchContext());
-            rangeQuery = (NumericRangeQuery<Long>) defaultMapper.mappers().smartNameFieldMapper("date_field").fieldType().rangeQuery("Jan 02 10:00:00", "Jan 02 11:00:00", true, true, null).rewrite(null);
+            rangeQuery = (NumericRangeQuery<Long>) defaultMapper.mappers().smartNameFieldMapper("date_field").fieldType().rangeQuery("Jan 02 10:00:00", "Jan 02 11:00:00", true, true).rewrite(null);
         } finally {
             SearchContext.removeCurrent();
         }
         assertThat(rangeQuery.getMax(), equalTo(new DateTime(TimeValue.timeValueHours(35).millis(), DateTimeZone.UTC).getMillis()));
         assertThat(rangeQuery.getMin(), equalTo(new DateTime(TimeValue.timeValueHours(34).millis(), DateTimeZone.UTC).getMillis()));
     }
-    
+
     public void testIgnoreMalformedOption() throws Exception {
         String mapping = XContentFactory.jsonBuilder().startObject().startObject("type")
                 .startObject("properties")
@@ -377,7 +377,7 @@ public class SimpleDateMappingTests extends ElasticsearchSingleNodeTest {
         Map<String, String> mergedConfig = getConfigurationViaXContent(mergedFieldMapper);
         assertThat(mergedConfig.get("format"), is("EEE MMM dd HH:mm:ss.S Z yyyy||EEE MMM dd HH:mm:ss.SSS Z yyyy||yyyy-MM-dd'T'HH:mm:ss.SSSZZ"));
     }
-    
+
     public void testDefaultDocValues() throws Exception {
         String mapping = XContentFactory.jsonBuilder().startObject().startObject("type")
             .startObject("properties").startObject("date_field").field("type", "date").endObject().endObject()

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

@@ -58,7 +58,7 @@ public class ExistsQueryBuilderTest extends BaseQueryTestCase<ExistsQueryBuilder
                 if (fieldType == null) {
                     boolFilter.add(new TermRangeQuery(field, null, null, true, true), BooleanClause.Occur.SHOULD);
                 } else {
-                    boolFilter.add(fieldType.rangeQuery(null, null, true, true, context), BooleanClause.Occur.SHOULD);
+                    boolFilter.add(fieldType.rangeQuery(null, null, true, true), BooleanClause.Occur.SHOULD);
                 }
             }
         }

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

@@ -72,7 +72,7 @@ public class MissingQueryBuilderTest extends BaseQueryTestCase<MissingQueryBuild
         final boolean existence = queryBuilder.existence();
         final boolean nullValue = queryBuilder.nullValue();
         String fieldPattern = queryBuilder.fieldPattern();
-        
+
         if (!existence && !nullValue) {
             throw new QueryParsingException(context, "missing must have either existence, or null_value, or both set to true");
         }
@@ -117,7 +117,7 @@ public class MissingQueryBuilderTest extends BaseQueryTestCase<MissingQueryBuild
                 }
                 // if _field_names are not indexed, we need to go the slow way
                 if (filter == null && fieldType != null) {
-                    filter = fieldType.rangeQuery(null, null, true, true, context);
+                    filter = fieldType.rangeQuery(null, null, true, true);
                 }
                 if (filter == null) {
                     filter = new TermRangeQuery(field, null, null, true, true);
@@ -174,7 +174,7 @@ public class MissingQueryBuilderTest extends BaseQueryTestCase<MissingQueryBuild
         missingQueryBuilder = new MissingQueryBuilder("field");
         assertNull(missingQueryBuilder.validate());
     }
-    
+
     @Test(expected = QueryParsingException.class)
     public void testBothNullValueAndExistenceFalse() throws IOException {
         QueryParseContext context = createContext();

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

@@ -111,7 +111,7 @@ public class RangeQueryBuilderTest extends BaseQueryTestCase<RangeQueryBuilder>
             }
             MappedFieldType mapper = context.fieldMapper(queryBuilder.fieldName());
             expectedQuery = ((DateFieldMapper.DateFieldType) mapper).rangeQuery(BytesRefs.toBytesRef(queryBuilder.from()), BytesRefs.toBytesRef(queryBuilder.to()),
-                    queryBuilder.includeLower(), queryBuilder.includeUpper(), dateTimeZone, forcedDateParser, context);
+                    queryBuilder.includeLower(), queryBuilder.includeUpper(), dateTimeZone, forcedDateParser);
         } else if (queryBuilder.fieldName().equals(INT_FIELD_NAME)) {
             expectedQuery = NumericRangeQuery.newIntRange(INT_FIELD_NAME, (Integer) queryBuilder.from(), (Integer) queryBuilder.to(),
                     queryBuilder.includeLower(), queryBuilder.includeUpper());

core/src/test/java/org/elasticsearch/index/shard/IndexShardTests.java

@@ -205,7 +205,7 @@ public class IndexShardTests extends ElasticsearchSingleNodeTest {
         ShardStateMetaData shardStateMetaData = load(logger, env.availableShardPaths(shard.shardId));
         assertEquals(shardStateMetaData, getShardStateMetadata(shard));
 
-        routing = TestShardRouting.newShardRouting(shard.shardId.index().getName(), shard.shardId.id(), routing.currentNodeId(), null, null, routing.primary(), ShardRoutingState.INITIALIZING, shard.shardRouting.version() + 1);
+        routing = TestShardRouting.newShardRouting(shard.shardId.index().getName(), shard.shardId.id(), routing.currentNodeId(), null, routing.primary(), ShardRoutingState.INITIALIZING, shard.shardRouting.allocationId(), shard.shardRouting.version() + 1);
         shard.updateRoutingEntry(routing, true);
         shard.deleteShardState();
 

core/src/test/java/org/elasticsearch/node/internal/InternalSettingsPreparerTests.java

@@ -29,6 +29,8 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 
+import java.net.URL;
+import java.net.URLClassLoader;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.concurrent.atomic.AtomicInteger;
@@ -220,4 +222,19 @@ public class InternalSettingsPreparerTests extends ElasticsearchTestCase {
         assertThat(settings.get("name"), is("prompted name 0"));
         assertThat(settings.get("node.name"), is("prompted name 0"));
     }
+
+    @Test
+    public void testPreserveSettingsClassloader() {
+        final ClassLoader classLoader = URLClassLoader.newInstance(new URL[0]);
+        Settings settings = settingsBuilder()
+                .put("foo", "bar")
+                .put("path.home", createTempDir())
+                .classLoader(classLoader)
+                .build();
+
+        Tuple<Settings, Environment> tuple = InternalSettingsPreparer.prepareSettings(settings, randomBoolean());
+
+        Settings preparedSettings = tuple.v1();
+        assertThat(preparedSettings.getClassLoaderIfSet(), is(classLoader));
+    }
 }

core/src/test/java/org/elasticsearch/plugins/PluginInfoTests.java

@@ -38,7 +38,7 @@ import static org.hamcrest.Matchers.contains;
 
 public class PluginInfoTests extends ElasticsearchTestCase {
 
-    void writeProperties(Path pluginDir, String... stringProps) throws IOException {
+    static void writeProperties(Path pluginDir, String... stringProps) throws IOException {
         assert stringProps.length % 2 == 0;
         Files.createDirectories(pluginDir);
         Path propertiesFile = pluginDir.resolve(PluginInfo.ES_PLUGIN_PROPERTIES);
@@ -57,6 +57,7 @@ public class PluginInfoTests extends ElasticsearchTestCase {
             "description", "fake desc",
             "version", "1.0",
             "elasticsearch.version", Version.CURRENT.toString(),
+            "java.version", System.getProperty("java.specification.version"),
             "jvm", "true",
             "classname", "FakePlugin");
         PluginInfo info = PluginInfo.readFromProperties(pluginDir);
@@ -119,6 +120,38 @@ public class PluginInfoTests extends ElasticsearchTestCase {
         }
     }
 
+    public void testReadFromPropertiesJavaVersionMissing() throws Exception {
+        Path pluginDir = createTempDir().resolve("fake-plugin");
+        writeProperties(pluginDir,
+            "description", "fake desc",
+            "elasticsearch.version", Version.CURRENT.toString(),
+            "version", "1.0",
+            "jvm", "true");
+        try {
+            PluginInfo.readFromProperties(pluginDir);
+            fail("expected missing java version exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("[java.version] is missing"));
+        }
+    }
+
+    public void testReadFromPropertiesJavaVersionIncompatible() throws Exception {
+        Path pluginDir = createTempDir().resolve("fake-plugin");
+        writeProperties(pluginDir,
+            "description", "fake desc",
+            "elasticsearch.version", Version.CURRENT.toString(),
+            "java.version", "1000000.0",
+            "classname", "FakePlugin",
+            "version", "1.0",
+            "jvm", "true");
+        try {
+            PluginInfo.readFromProperties(pluginDir);
+            fail("expected incompatible java version exception");
+        } catch (IllegalStateException e) {
+            assertTrue(e.getMessage(), e.getMessage().contains("fake-plugin requires Java"));
+        }
+    }
+
     public void testReadFromPropertiesBogusElasticsearchVersion() throws Exception {
         Path pluginDir = createTempDir().resolve("fake-plugin");
         writeProperties(pluginDir,
@@ -155,6 +188,7 @@ public class PluginInfoTests extends ElasticsearchTestCase {
             "description", "fake desc",
             "version", "1.0",
             "elasticsearch.version", Version.CURRENT.toString(),
+            "java.version", System.getProperty("java.specification.version"),
             "jvm", "true");
         try {
             PluginInfo.readFromProperties(pluginDir);
@@ -166,16 +200,30 @@ public class PluginInfoTests extends ElasticsearchTestCase {
 
     public void testReadFromPropertiesSitePlugin() throws Exception {
         Path pluginDir = createTempDir().resolve("fake-plugin");
+        Files.createDirectories(pluginDir.resolve("_site"));
         writeProperties(pluginDir,
             "description", "fake desc",
             "version", "1.0",
-            "elasticsearch.version", Version.CURRENT.toString(),
             "site", "true");
         PluginInfo info = PluginInfo.readFromProperties(pluginDir);
         assertTrue(info.isSite());
         assertFalse(info.isJvm());
         assertEquals("NA", info.getClassname());
     }
+    
+    public void testReadFromPropertiesSitePluginWithoutSite() throws Exception {
+        Path pluginDir = createTempDir().resolve("fake-plugin");
+        writeProperties(pluginDir,
+            "description", "fake desc",
+            "version", "1.0",
+            "site", "true");
+        try {
+            PluginInfo.readFromProperties(pluginDir);
+            fail("didn't get expected exception");
+        } catch (IllegalArgumentException e) {
+            assertTrue(e.getMessage().contains("site plugin but has no '_site"));
+        }
+    }
 
     public void testPluginListSorted() {
         PluginsInfo pluginsInfo = new PluginsInfo(5);

core/src/test/java/org/elasticsearch/plugins/PluginManagerTests.java

@@ -20,6 +20,7 @@ package org.elasticsearch.plugins;
 
 import org.apache.http.impl.client.HttpClients;
 import org.apache.lucene.util.LuceneTestCase;
+import org.elasticsearch.Version;
 import org.elasticsearch.common.cli.CliTool;
 import org.elasticsearch.common.cli.CliToolTestCase.CaptureOutputTerminal;
 import org.elasticsearch.common.collect.Tuple;
@@ -36,13 +37,18 @@ import org.junit.Before;
 import org.junit.Test;
 
 import java.io.IOException;
-import java.net.URI;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.FileVisitResult;
 import java.nio.file.Files;
 import java.nio.file.Path;
+import java.nio.file.SimpleFileVisitor;
+import java.nio.file.attribute.BasicFileAttributes;
 import java.nio.file.attribute.PosixFileAttributeView;
 import java.nio.file.attribute.PosixFileAttributes;
 import java.nio.file.attribute.PosixFilePermission;
 import java.util.Locale;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
 
 import static org.elasticsearch.common.cli.CliTool.ExitStatus.USAGE;
 import static org.elasticsearch.common.cli.CliToolTestCase.args;
@@ -52,6 +58,7 @@ import static org.elasticsearch.test.ElasticsearchIntegrationTest.Scope;
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertDirectoryExists;
 import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertFileExists;
 import static org.hamcrest.Matchers.*;
+import static org.elasticsearch.plugins.PluginInfoTests.writeProperties;
 
 @ClusterScope(scope = Scope.TEST, numDataNodes = 0, transportClientRatio = 0.0)
 @LuceneTestCase.SuppressFileSystems("*") // TODO: clean up this test to allow extra files
@@ -74,29 +81,65 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
         if (!Files.exists(configDir)) {
             Files.createDirectories(configDir);
         }
-
     }
 
     @After
     public void clearPathHome() {
         System.clearProperty("es.default.path.home");
     }
+    
+    /** creates a plugin .zip and returns the url for testing */
+    private String createPlugin(final Path structure, String... properties) throws IOException {
+        writeProperties(structure, properties);
+        Path zip = createTempDir().resolve(structure.getFileName() + ".zip");
+        try (ZipOutputStream stream = new ZipOutputStream(Files.newOutputStream(zip))) {
+            Files.walkFileTree(structure, new SimpleFileVisitor<Path>() {
+                @Override
+                public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
+                    stream.putNextEntry(new ZipEntry(structure.relativize(file).toString()));
+                    Files.copy(file, stream);
+                    return FileVisitResult.CONTINUE;
+                }
+            });
+        }
+        return zip.toUri().toURL().toString();
+    }
 
     @Test
     public void testThatPluginNameMustBeSupplied() throws IOException {
-        String pluginUrl = getPluginUrlForResource("plugin_with_bin_and_config.zip");
+        Path pluginDir = createTempDir().resolve("fake-plugin");
+        String pluginUrl = createPlugin(pluginDir,
+            "description", "fake desc",
+            "version", "1.0",
+            "elasticsearch.version", Version.CURRENT.toString(),
+            "jvm", "true",
+            "classname", "FakePlugin");
         assertStatus("install --url " + pluginUrl, USAGE);
     }
 
     @Test
     public void testLocalPluginInstallWithBinAndConfig() throws Exception {
-        String pluginName = "plugin-test";
+        String pluginName = "fake-plugin";
+        Path pluginDir = createTempDir().resolve(pluginName);
+        // create bin/tool and config/file
+        Files.createDirectories(pluginDir.resolve("bin"));
+        Files.createFile(pluginDir.resolve("bin").resolve("tool"));
+        Files.createDirectories(pluginDir.resolve("config"));
+        Files.createFile(pluginDir.resolve("config").resolve("file"));
+        
+        String pluginUrl = createPlugin(pluginDir,
+            "description", "fake desc",
+            "version", "1.0",
+            "elasticsearch.version", Version.CURRENT.toString(),
+            "java.version", System.getProperty("java.specification.version"),
+            "jvm", "true",
+            "classname", "FakePlugin");
+        
         Environment env = initialSettings.v2();
         Path binDir = env.homeFile().resolve("bin");
         Path pluginBinDir = binDir.resolve(pluginName);
 
         Path pluginConfigDir = env.configFile().resolve(pluginName);
-        String pluginUrl = getPluginUrlForResource("plugin_with_bin_and_config.zip");
         assertStatusOk("install " + pluginName + " --url " + pluginUrl + " --verbose");
 
         terminal.getTerminalOutput().clear();
@@ -123,23 +166,36 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
      */
     @Test
     public void testLocalPluginInstallWithBinAndConfigInAlreadyExistingConfigDir_7890() throws Exception {
-        String pluginName = "plugin-test";
+        String pluginName = "fake-plugin";
+        Path pluginDir = createTempDir().resolve(pluginName);
+        // create config/test.txt with contents 'version1'
+        Files.createDirectories(pluginDir.resolve("config"));
+        Files.write(pluginDir.resolve("config").resolve("test.txt"), "version1".getBytes(StandardCharsets.UTF_8));
+        
+        String pluginUrl = createPlugin(pluginDir,
+            "description", "fake desc",
+            "version", "1.0",
+            "elasticsearch.version", Version.CURRENT.toString(),
+            "java.version", System.getProperty("java.specification.version"),
+            "jvm", "true",
+            "classname", "FakePlugin");
+        
         Environment env = initialSettings.v2();
         Path pluginConfigDir = env.configFile().resolve(pluginName);
 
-        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, getPluginUrlForResource("plugin_with_config_v1.zip")));
+        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, pluginUrl));
 
         /*
         First time, our plugin contains:
         - config/test.txt (version1)
          */
-        assertFileContent(pluginConfigDir, "test.txt", "version1\n");
+        assertFileContent(pluginConfigDir, "test.txt", "version1");
 
         // We now remove the plugin
         assertStatusOk("remove " + pluginName);
 
         // We should still have test.txt
-        assertFileContent(pluginConfigDir, "test.txt", "version1\n");
+        assertFileContent(pluginConfigDir, "test.txt", "version1");
 
         // Installing a new plugin version
         /*
@@ -148,19 +204,31 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
         - config/dir/testdir.txt (version1)
         - config/dir/subdir/testsubdir.txt (version1)
          */
-        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, getPluginUrlForResource("plugin_with_config_v2.zip")));
+        Files.write(pluginDir.resolve("config").resolve("test.txt"), "version2".getBytes(StandardCharsets.UTF_8));
+        Files.createDirectories(pluginDir.resolve("config").resolve("dir").resolve("subdir"));
+        Files.write(pluginDir.resolve("config").resolve("dir").resolve("testdir.txt"), "version1".getBytes(StandardCharsets.UTF_8));
+        Files.write(pluginDir.resolve("config").resolve("dir").resolve("subdir").resolve("testsubdir.txt"), "version1".getBytes(StandardCharsets.UTF_8));
+        pluginUrl = createPlugin(pluginDir,
+                "description", "fake desc",
+                "version", "2.0",
+                "elasticsearch.version", Version.CURRENT.toString(),
+                "java.version", System.getProperty("java.specification.version"),
+                "jvm", "true",
+                "classname", "FakePlugin");
+ 
+        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, pluginUrl));
 
-        assertFileContent(pluginConfigDir, "test.txt", "version1\n");
-        assertFileContent(pluginConfigDir, "test.txt.new", "version2\n");
-        assertFileContent(pluginConfigDir, "dir/testdir.txt", "version1\n");
-        assertFileContent(pluginConfigDir, "dir/subdir/testsubdir.txt", "version1\n");
+        assertFileContent(pluginConfigDir, "test.txt", "version1");
+        assertFileContent(pluginConfigDir, "test.txt.new", "version2");
+        assertFileContent(pluginConfigDir, "dir/testdir.txt", "version1");
+        assertFileContent(pluginConfigDir, "dir/subdir/testsubdir.txt", "version1");
 
         // Removing
         assertStatusOk("remove " + pluginName);
-        assertFileContent(pluginConfigDir, "test.txt", "version1\n");
-        assertFileContent(pluginConfigDir, "test.txt.new", "version2\n");
-        assertFileContent(pluginConfigDir, "dir/testdir.txt", "version1\n");
-        assertFileContent(pluginConfigDir, "dir/subdir/testsubdir.txt", "version1\n");
+        assertFileContent(pluginConfigDir, "test.txt", "version1");
+        assertFileContent(pluginConfigDir, "test.txt.new", "version2");
+        assertFileContent(pluginConfigDir, "dir/testdir.txt", "version1");
+        assertFileContent(pluginConfigDir, "dir/subdir/testsubdir.txt", "version1");
 
         // Installing a new plugin version
         /*
@@ -171,40 +239,56 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
         - config/dir/testdir2.txt (version1)
         - config/dir/subdir/testsubdir.txt (version2)
          */
-        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, getPluginUrlForResource("plugin_with_config_v3.zip")));
+        Files.write(pluginDir.resolve("config").resolve("test.txt"), "version3".getBytes(StandardCharsets.UTF_8));
+        Files.write(pluginDir.resolve("config").resolve("test2.txt"), "version1".getBytes(StandardCharsets.UTF_8));
+        Files.write(pluginDir.resolve("config").resolve("dir").resolve("testdir.txt"), "version2".getBytes(StandardCharsets.UTF_8));
+        Files.write(pluginDir.resolve("config").resolve("dir").resolve("testdir2.txt"), "version1".getBytes(StandardCharsets.UTF_8));
+        Files.write(pluginDir.resolve("config").resolve("dir").resolve("subdir").resolve("testsubdir.txt"), "version2".getBytes(StandardCharsets.UTF_8));
+        pluginUrl = createPlugin(pluginDir,
+                "description", "fake desc",
+                "version", "3.0",
+                "elasticsearch.version", Version.CURRENT.toString(),
+                "java.version", System.getProperty("java.specification.version"),
+                "jvm", "true",
+                "classname", "FakePlugin");
 
-        assertFileContent(pluginConfigDir, "test.txt", "version1\n");
-        assertFileContent(pluginConfigDir, "test2.txt", "version1\n");
-        assertFileContent(pluginConfigDir, "test.txt.new", "version3\n");
-        assertFileContent(pluginConfigDir, "dir/testdir.txt", "version1\n");
-        assertFileContent(pluginConfigDir, "dir/testdir.txt.new", "version2\n");
-        assertFileContent(pluginConfigDir, "dir/testdir2.txt", "version1\n");
-        assertFileContent(pluginConfigDir, "dir/subdir/testsubdir.txt", "version1\n");
-        assertFileContent(pluginConfigDir, "dir/subdir/testsubdir.txt.new", "version2\n");
+        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, pluginUrl));
+
+        assertFileContent(pluginConfigDir, "test.txt", "version1");
+        assertFileContent(pluginConfigDir, "test2.txt", "version1");
+        assertFileContent(pluginConfigDir, "test.txt.new", "version3");
+        assertFileContent(pluginConfigDir, "dir/testdir.txt", "version1");
+        assertFileContent(pluginConfigDir, "dir/testdir.txt.new", "version2");
+        assertFileContent(pluginConfigDir, "dir/testdir2.txt", "version1");
+        assertFileContent(pluginConfigDir, "dir/subdir/testsubdir.txt", "version1");
+        assertFileContent(pluginConfigDir, "dir/subdir/testsubdir.txt.new", "version2");
     }
 
     // For #7152
     @Test
     public void testLocalPluginInstallWithBinOnly_7152() throws Exception {
-        String pluginName = "plugin-test";
+        String pluginName = "fake-plugin";
+        Path pluginDir = createTempDir().resolve(pluginName);
+        // create bin/tool
+        Files.createDirectories(pluginDir.resolve("bin"));
+        Files.createFile(pluginDir.resolve("bin").resolve("tool"));;
+        String pluginUrl = createPlugin(pluginDir,
+            "description", "fake desc",
+            "version", "1.0",
+            "elasticsearch.version", Version.CURRENT.toString(),
+            "java.version", System.getProperty("java.specification.version"),
+            "jvm", "true",
+            "classname", "FakePlugin");
+        
         Environment env = initialSettings.v2();
         Path binDir = env.homeFile().resolve("bin");
         Path pluginBinDir = binDir.resolve(pluginName);
 
-        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, getPluginUrlForResource("plugin_with_bin_only.zip")));
+        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, pluginUrl));
         assertThatPluginIsListed(pluginName);
         assertDirectoryExists(pluginBinDir);
     }
 
-    @Test
-    public void testSitePluginWithSourceDoesNotInstall() throws Exception {
-        String pluginName = "plugin-with-source";
-        String cmd = String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, getPluginUrlForResource("plugin_with_sourcefiles.zip"));
-        int status = new PluginManagerCliParser(terminal).execute(args(cmd));
-        assertThat(status, is(USAGE.status()));
-        assertThat(terminal.getTerminalOutput(), hasItem(containsString("Plugin installation assumed to be site plugin, but contains source code, aborting installation")));
-    }
-
     @Test
     public void testListInstalledEmpty() throws IOException {
         assertStatusOk("list");
@@ -220,18 +304,33 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
 
     @Test
     public void testInstallPlugin() throws IOException {
-        String pluginName = "plugin-classfile";
-        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, getPluginUrlForResource("plugin_with_classfile.zip")));
-        assertThatPluginIsListed("plugin-classfile");
+        String pluginName = "fake-plugin";
+        Path pluginDir = createTempDir().resolve(pluginName);
+        String pluginUrl = createPlugin(pluginDir,
+            "description", "fake desc",
+            "version", "1.0",
+            "elasticsearch.version", Version.CURRENT.toString(),
+            "java.version", System.getProperty("java.specification.version"),
+            "jvm", "true",
+            "classname", "FakePlugin");
+        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, pluginUrl));
+        assertThatPluginIsListed(pluginName);
     }
 
     @Test
     public void testInstallSitePlugin() throws IOException {
-        String pluginName = "plugin-site";
-        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, getPluginUrlForResource("plugin_without_folders.zip")));
+        String pluginName = "fake-plugin";
+        Path pluginDir = createTempDir().resolve(pluginName);
+        Files.createDirectories(pluginDir.resolve("_site"));
+        Files.createFile(pluginDir.resolve("_site").resolve("somefile"));
+        String pluginUrl = createPlugin(pluginDir,
+            "description", "fake desc",
+            "version", "1.0",
+            "site", "true");
+        assertStatusOk(String.format(Locale.ROOT, "install %s --url %s --verbose", pluginName, pluginUrl));
         assertThatPluginIsListed(pluginName);
         // We want to check that Plugin Manager moves content to _site
-        assertFileExists(initialSettings.v2().pluginsFile().resolve("plugin-site/_site"));
+        assertFileExists(initialSettings.v2().pluginsFile().resolve(pluginName).resolve("_site"));
     }
 
 
@@ -313,14 +412,24 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
 
     @Test
     public void testRemovePlugin() throws Exception {
+        String pluginName = "plugintest";
+        Path pluginDir = createTempDir().resolve(pluginName);        
+        String pluginUrl = createPlugin(pluginDir,
+            "description", "fake desc",
+            "version", "1.0.0",
+            "elasticsearch.version", Version.CURRENT.toString(),
+            "java.version", System.getProperty("java.specification.version"),
+            "jvm", "true",
+            "classname", "FakePlugin");
+        
         // We want to remove plugin with plugin short name
-        singlePluginInstallAndRemove("plugintest", "plugintest", getPluginUrlForResource("plugin_without_folders.zip"));
+        singlePluginInstallAndRemove("plugintest", "plugintest", pluginUrl);
 
         // We want to remove plugin with groupid/artifactid/version form
-        singlePluginInstallAndRemove("groupid/plugintest/1.0.0", "plugintest", getPluginUrlForResource("plugin_without_folders.zip"));
+        singlePluginInstallAndRemove("groupid/plugintest/1.0.0", "plugintest", pluginUrl);
 
         // We want to remove plugin with groupid/artifactid form
-        singlePluginInstallAndRemove("groupid/plugintest", "plugintest", getPluginUrlForResource("plugin_without_folders.zip"));
+        singlePluginInstallAndRemove("groupid/plugintest", "plugintest", pluginUrl);
     }
 
     @Test
@@ -370,18 +479,6 @@ public class PluginManagerTests extends ElasticsearchIntegrationTest {
         }
     }
 
-    /**
-     * Retrieve a URL string that represents the resource with the given {@code resourceName}.
-     * @param resourceName The resource name relative to {@link PluginManagerTests}.
-     * @return Never {@code null}.
-     * @throws NullPointerException if {@code resourceName} does not point to a valid resource.
-     */
-    private String getPluginUrlForResource(String resourceName) {
-        URI uri = URI.create(PluginManagerTests.class.getResource(resourceName).toString());
-
-        return "file://" + uri.getPath();
-    }
-
     private Tuple<Settings, Environment> buildInitialSettings() throws IOException {
         Settings settings = settingsBuilder()
                 .put("discovery.zen.ping.multicast.enabled", false)

core/src/test/java/org/elasticsearch/test/ElasticsearchTestCase.java

@@ -54,6 +54,7 @@ import org.elasticsearch.env.Environment;
 import org.elasticsearch.env.NodeEnvironment;
 import org.elasticsearch.test.cache.recycler.MockBigArrays;
 import org.elasticsearch.test.cache.recycler.MockPageCacheRecycler;
+import org.elasticsearch.test.junit.listeners.AssertionErrorThreadDumpPrinter;
 import org.elasticsearch.test.junit.listeners.LoggingListener;
 import org.elasticsearch.test.junit.listeners.ReproduceInfoPrinter;
 import org.elasticsearch.test.search.MockSearchService;
@@ -78,7 +79,8 @@ import static com.google.common.collect.Lists.newArrayList;
  */
 @Listeners({
         ReproduceInfoPrinter.class,
-        LoggingListener.class
+        LoggingListener.class,
+        AssertionErrorThreadDumpPrinter.class
 })
 // remove this entire annotation on upgrade to 5.3!
 @ThreadLeakFilters(defaultFilters = true, filters = {
@@ -550,44 +552,7 @@ public abstract class ElasticsearchTestCase extends LuceneTestCase {
     protected static final void printStackDump(ESLogger logger) {
         // print stack traces if we can't create any native thread anymore
         Map<Thread, StackTraceElement[]> allStackTraces = Thread.getAllStackTraces();
-        logger.error(formatThreadStacks(allStackTraces));
-    }
-
-    /** Dump threads and their current stack trace. */
-    private static String formatThreadStacks(Map<Thread, StackTraceElement[]> threads) {
-        StringBuilder message = new StringBuilder();
-        int cnt = 1;
-        final Formatter f = new Formatter(message, Locale.ENGLISH);
-        for (Map.Entry<Thread, StackTraceElement[]> e : threads.entrySet()) {
-            if (e.getKey().isAlive()) {
-                f.format(Locale.ENGLISH, "\n  %2d) %s", cnt++, threadName(e.getKey())).flush();
-            }
-            if (e.getValue().length == 0) {
-                message.append("\n        at (empty stack)");
-            } else {
-                for (StackTraceElement ste : e.getValue()) {
-                    message.append("\n        at ").append(ste);
-                }
-            }
-        }
-        return message.toString();
-    }
-
-    private static String threadName(Thread t) {
-        return "Thread[" +
-                "id=" + t.getId() +
-                ", name=" + t.getName() +
-                ", state=" + t.getState() +
-                ", group=" + groupName(t.getThreadGroup()) +
-                "]";
-    }
-
-    private static String groupName(ThreadGroup threadGroup) {
-        if (threadGroup == null) {
-            return "{null group}";
-        } else {
-            return threadGroup.getName();
-        }
+        logger.error(StackTraces.formatThreadStacks(allStackTraces));
     }
 
     /**

core/src/test/java/org/elasticsearch/test/StackTraces.java

@@ -0,0 +1,63 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.test;
+
+import java.util.Formatter;
+import java.util.Locale;
+import java.util.Map;
+
+public class StackTraces {
+    /** Dump threads and their current stack trace. */
+    public static String formatThreadStacks(Map<Thread, StackTraceElement[]> threads) {
+        StringBuilder message = new StringBuilder();
+        int cnt = 1;
+        final Formatter f = new Formatter(message, Locale.ENGLISH);
+        for (Map.Entry<Thread, StackTraceElement[]> e : threads.entrySet()) {
+            if (e.getKey().isAlive()) {
+                f.format(Locale.ENGLISH, "\n  %2d) %s", cnt++, threadName(e.getKey())).flush();
+            }
+            if (e.getValue().length == 0) {
+                message.append("\n        at (empty stack)");
+            } else {
+                for (StackTraceElement ste : e.getValue()) {
+                    message.append("\n        at ").append(ste);
+                }
+            }
+        }
+        return message.toString();
+    }
+
+    private static String groupName(ThreadGroup threadGroup) {
+        if (threadGroup == null) {
+            return "{null group}";
+        } else {
+            return threadGroup.getName();
+        }
+    }
+
+    private static String threadName(Thread t) {
+        return "Thread[" +
+                "id=" + t.getId() +
+                ", name=" + t.getName() +
+                ", state=" + t.getState() +
+                ", group=" + groupName(t.getThreadGroup()) +
+                "]";
+    }
+}

core/src/test/java/org/elasticsearch/test/junit/listeners/AssertionErrorThreadDumpPrinter.java

@@ -0,0 +1,37 @@
+/*
+ * Licensed to Elasticsearch under one or more contributor
+ * license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright
+ * ownership. Elasticsearch licenses this file to you under
+ * the Apache License, Version 2.0 (the "License"); you may
+ * not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+
+package org.elasticsearch.test.junit.listeners;
+
+import org.elasticsearch.test.StackTraces;
+import org.junit.runner.notification.Failure;
+import org.junit.runner.notification.RunListener;
+
+import java.util.Map;
+
+public class AssertionErrorThreadDumpPrinter extends RunListener {
+    @Override
+    public void testFailure(Failure failure) throws Exception {
+        if (failure.getException() instanceof AssertionError) {
+            Map<Thread, StackTraceElement[]> allStackTraces = Thread.getAllStackTraces();
+            String threadStacks = StackTraces.formatThreadStacks(allStackTraces);
+            System.err.println(threadStacks);
+        }
+    }
+}

core/src/test/java/org/elasticsearch/transport/netty/KeyedLockTests.java

@@ -39,7 +39,7 @@ public class KeyedLockTests extends ElasticsearchTestCase {
     public void checkIfMapEmptyAfterLotsOfAcquireAndReleases() throws InterruptedException {
         ConcurrentHashMap<String, Integer> counter = new ConcurrentHashMap<>();
         ConcurrentHashMap<String, AtomicInteger> safeCounter = new ConcurrentHashMap<>();
-        KeyedLock<String> connectionLock = randomBoolean() ? new KeyedLock.GlobalLockable<String>(randomBoolean()) : new KeyedLock<String>(randomBoolean());
+        KeyedLock<String> connectionLock = new KeyedLock<String>(randomBoolean());
         String[] names = new String[randomIntBetween(1, 40)];
         for (int i = 0; i < names.length; i++) {
             names[i] = randomRealisticUnicodeOfLengthBetween(10, 20);
@@ -54,11 +54,6 @@ public class KeyedLockTests extends ElasticsearchTestCase {
             threads[i].start();
         }
         startLatch.countDown();
-        for (int i = 0; i < numThreads; i++) {
-            if (randomBoolean()) {
-                threads[i].incWithGlobal();
-            }
-        }
 
         for (int i = 0; i < numThreads; i++) {
             threads[i].join();
@@ -74,23 +69,9 @@ public class KeyedLockTests extends ElasticsearchTestCase {
         }
     }
 
-    @Test(expected = IllegalStateException.class)
-    public void checkCannotAcquireTwoLocksGlobal() throws InterruptedException {
-        KeyedLock.GlobalLockable<String> connectionLock = new KeyedLock.GlobalLockable<>();
-        String name = randomRealisticUnicodeOfLength(scaledRandomIntBetween(10, 50));
-        connectionLock.acquire(name);
-        try {
-            connectionLock.acquire(name);
-        } finally {
-           connectionLock.release(name);
-           connectionLock.globalLock().lock();
-           connectionLock.globalLock().unlock();
-        }
-    }
-
     @Test(expected = IllegalStateException.class)
     public void checkCannotAcquireTwoLocks() throws InterruptedException {
-        KeyedLock<String> connectionLock = randomBoolean() ? new KeyedLock.GlobalLockable<String>() : new KeyedLock<String>();
+        KeyedLock<String> connectionLock = new KeyedLock<String>();
         String name = randomRealisticUnicodeOfLength(scaledRandomIntBetween(10, 50));
         connectionLock.acquire(name);
         connectionLock.acquire(name);
@@ -98,7 +79,7 @@ public class KeyedLockTests extends ElasticsearchTestCase {
 
     @Test(expected = IllegalStateException.class)
     public void checkCannotReleaseUnacquiredLock() throws InterruptedException {
-        KeyedLock<String> connectionLock = randomBoolean() ? new KeyedLock.GlobalLockable<String>() : new KeyedLock<String>();
+        KeyedLock<String> connectionLock = new KeyedLock<String>();
         String name = randomRealisticUnicodeOfLength(scaledRandomIntBetween(10, 50));
         connectionLock.release(name);
     }
@@ -149,32 +130,5 @@ public class KeyedLockTests extends ElasticsearchTestCase {
                 }
             }
         }
-
-        public void incWithGlobal() {
-            if (connectionLock instanceof KeyedLock.GlobalLockable) {
-                final int iters = randomIntBetween(10, 200);
-                for (int i = 0; i < iters; i++) {
-                    ((KeyedLock.GlobalLockable) connectionLock).globalLock().lock();
-                    try {
-                        String curName = names[randomInt(names.length - 1)];
-                        Integer integer = counter.get(curName);
-                        if (integer == null) {
-                            counter.put(curName, 1);
-                        } else {
-                            counter.put(curName, integer.intValue() + 1);
-                        }
-                        AtomicInteger atomicInteger = new AtomicInteger(0);
-                        AtomicInteger value = safeCounter.putIfAbsent(curName, atomicInteger);
-                        if (value == null) {
-                            atomicInteger.incrementAndGet();
-                        } else {
-                            value.incrementAndGet();
-                        }
-                    } finally {
-                        ((KeyedLock.GlobalLockable) connectionLock).globalLock().unlock();
-                    }
-                }
-            }
-        }
     }
 }