Merge branch 'master' into feature/client_aggs_parsing

buildSrc/src/main/groovy/org/elasticsearch/gradle/test/ClusterFormationTasks.groovy

@@ -657,11 +657,11 @@ class ClusterFormationTasks {
             standardOutput = new ByteArrayOutputStream()
             doLast {
                 String out = standardOutput.toString()
-                if (out.contains("${pid} org.elasticsearch.bootstrap.Elasticsearch") == false) {
+                if (out.contains("${ext.pid} org.elasticsearch.bootstrap.Elasticsearch") == false) {
                     logger.error('jps -l')
                     logger.error(out)
-                    logger.error("pid file: ${pidFile}")
+                    logger.error("pid file: ${node.pidFile}")
-                    logger.error("pid: ${pid}")
+                    logger.error("pid: ${ext.pid}")
                     throw new GradleException("jps -l did not report any process with org.elasticsearch.bootstrap.Elasticsearch\n" +
                             "Did you run gradle clean? Maybe an old pid file is still lying around.")
                 } else {

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

@@ -55,7 +55,6 @@ import org.elasticsearch.threadpool.ThreadPool;
 import java.io.IOException;
 import java.util.Collections;
 import java.util.Map;
-import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicReference;
 
 import static java.util.Collections.singletonMap;
@@ -63,16 +62,6 @@ import static java.util.Collections.singletonMap;
 public class CrudIT extends ESRestHighLevelClientTestCase {
 
     public void testDelete() throws IOException {
-        {
-            // Testing non existing document
-            String docId = "does_not_exist";
-            DeleteRequest deleteRequest = new DeleteRequest("index", "type", docId);
-            DeleteResponse deleteResponse = execute(deleteRequest, highLevelClient()::delete, highLevelClient()::deleteAsync);
-            assertEquals("index", deleteResponse.getIndex());
-            assertEquals("type", deleteResponse.getType());
-            assertEquals(docId, deleteResponse.getId());
-            assertEquals(DocWriteResponse.Result.NOT_FOUND, deleteResponse.getResult());
-        }
         {
             // Testing deletion
             String docId = "id";
@@ -87,6 +76,16 @@ public class CrudIT extends ESRestHighLevelClientTestCase {
             assertEquals(docId, deleteResponse.getId());
             assertEquals(DocWriteResponse.Result.DELETED, deleteResponse.getResult());
         }
+        {
+            // Testing non existing document
+            String docId = "does_not_exist";
+            DeleteRequest deleteRequest = new DeleteRequest("index", "type", docId);
+            DeleteResponse deleteResponse = execute(deleteRequest, highLevelClient()::delete, highLevelClient()::deleteAsync);
+            assertEquals("index", deleteResponse.getIndex());
+            assertEquals("type", deleteResponse.getType());
+            assertEquals(docId, deleteResponse.getId());
+            assertEquals(DocWriteResponse.Result.NOT_FOUND, deleteResponse.getResult());
+        }
         {
             // Testing version conflict
             String docId = "version_conflict";

core/src/main/java/org/elasticsearch/Version.java

@@ -72,6 +72,8 @@ public class Version implements Comparable<Version> {
     public static final Version V_5_3_1 = new Version(V_5_3_1_ID, org.apache.lucene.util.Version.LUCENE_6_4_2);
     public static final int V_5_3_2_ID = 5030299;
     public static final Version V_5_3_2 = new Version(V_5_3_2_ID, org.apache.lucene.util.Version.LUCENE_6_4_2);
+    public static final int V_5_3_3_ID_UNRELEASED = 5030399;
+    public static final Version V_5_3_3_UNRELEASED = new Version(V_5_3_3_ID_UNRELEASED, org.apache.lucene.util.Version.LUCENE_6_4_2);
     public static final int V_5_4_0_ID = 5040099;
     public static final Version V_5_4_0 = new Version(V_5_4_0_ID, org.apache.lucene.util.Version.LUCENE_6_5_0);
     public static final int V_5_5_0_ID_UNRELEASED = 5050099;
@@ -105,6 +107,8 @@ public class Version implements Comparable<Version> {
                 return V_5_5_0_UNRELEASED;
             case V_5_4_0_ID:
                 return V_5_4_0;
+            case V_5_3_3_ID_UNRELEASED:
+                return V_5_3_3_UNRELEASED;
             case V_5_3_2_ID:
                 return V_5_3_2;
             case V_5_3_1_ID:

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

@@ -54,6 +54,7 @@ import org.elasticsearch.common.util.concurrent.AbstractRunnable;
 import org.elasticsearch.common.util.concurrent.AtomicArray;
 import org.elasticsearch.index.Index;
 import org.elasticsearch.index.IndexNotFoundException;
+import org.elasticsearch.index.VersionType;
 import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.indices.IndexClosedException;
 import org.elasticsearch.ingest.IngestService;
@@ -144,6 +145,11 @@ public class TransportBulkAction extends HandledTransportAction<BulkRequest, Bul
             // Attempt to create all the indices that we're going to need during the bulk before we start.
             // Step 1: collect all the indices in the request
             final Set<String> indices = bulkRequest.requests.stream()
+                    // delete requests should not attempt to create the index (if the index does not
+                    // exists), unless an external versioning is used
+                .filter(request -> request.opType() != DocWriteRequest.OpType.DELETE 
+                        || request.versionType() == VersionType.EXTERNAL 
+                        || request.versionType() == VersionType.EXTERNAL_GTE)
                 .map(DocWriteRequest::index)
                 .collect(Collectors.toSet());
             /* Step 2: filter that to indices that don't exist and we can create. At the same time build a map of indices we can't create

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

@@ -38,7 +38,6 @@ import org.elasticsearch.cluster.block.ClusterBlockException;
 import org.elasticsearch.cluster.block.ClusterBlockLevel;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
 import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
-import org.elasticsearch.cluster.metadata.MetaData;
 import org.elasticsearch.cluster.node.DiscoveryNode;
 import org.elasticsearch.cluster.routing.AllocationId;
 import org.elasticsearch.cluster.routing.IndexShardRoutingTable;
@@ -52,7 +51,6 @@ import org.elasticsearch.common.lease.Releasables;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.util.concurrent.AbstractRunnable;
-import org.elasticsearch.common.util.concurrent.ThreadContext;
 import org.elasticsearch.index.IndexNotFoundException;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.shard.IndexShard;
@@ -179,8 +177,8 @@ public abstract class TransportReplicationAction<
             Request shardRequest, IndexShard primary) throws Exception;
 
     /**
-     * Synchronous replica operation on nodes with replica copies. This is done under the lock form
+     * Synchronously execute the specified replica operation. This is done under a permit from
-     * {@link IndexShard#acquireReplicaOperationLock(long, ActionListener, String)}
+     * {@link IndexShard#acquireReplicaOperationPermit(long, ActionListener, String)}.
      *
      * @param shardRequest the request to the replica shard
      * @param replica      the replica shard to perform the operation on
@@ -584,7 +582,7 @@ public abstract class TransportReplicationAction<
                 throw new ShardNotFoundException(this.replica.shardId(), "expected aID [{}] but found [{}]", targetAllocationID,
                     actualAllocationId);
             }
-            replica.acquireReplicaOperationLock(request.primaryTerm, this, executor);
+            replica.acquireReplicaOperationPermit(request.primaryTerm, this, executor);
         }
 
         /**
@@ -921,7 +919,7 @@ public abstract class TransportReplicationAction<
             }
         };
 
-        indexShard.acquirePrimaryOperationLock(onAcquired, executor);
+        indexShard.acquirePrimaryOperationPermit(onAcquired, executor);
     }
 
     class ShardReference implements Releasable {

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

@@ -612,11 +612,6 @@ public class IndexService extends AbstractIndexComponent implements IndicesClust
                 rescheduleFsyncTask(durability);
             }
         }
-
-        // update primary terms
-        for (final IndexShard shard : this.shards.values()) {
-            shard.updatePrimaryTerm(metadata.primaryTerm(shard.shardId().id()));
-        }
     }
 
     private void rescheduleFsyncTask(Translog.Durability durability) {

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

@@ -333,7 +333,8 @@ public class QueryShardContext extends QueryRewriteContext {
      */
     public final SearchScript getSearchScript(Script script, ScriptContext context) {
         failIfFrozen();
-        return scriptService.search(lookup(), script, context);
+        CompiledScript compile = scriptService.compile(script, context);
+        return scriptService.search(lookup(), compile, script.getParams());
     }
     /**
      * Returns a lazily created {@link SearchScript} that is compiled immediately but can be pulled later once all

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

@@ -50,7 +50,6 @@ import org.elasticsearch.common.collect.Tuple;
 import org.elasticsearch.common.io.stream.BytesStreamOutput;
 import org.elasticsearch.common.lease.Releasable;
 import org.elasticsearch.common.lease.Releasables;
-import org.elasticsearch.common.logging.LoggerMessageFormat;
 import org.elasticsearch.common.lucene.Lucene;
 import org.elasticsearch.common.metrics.MeanMetric;
 import org.elasticsearch.common.settings.Settings;
@@ -129,6 +128,7 @@ import java.nio.charset.StandardCharsets;
 import java.util.ArrayList;
 import java.util.EnumSet;
 import java.util.List;
+import java.util.Locale;
 import java.util.Map;
 import java.util.Objects;
 import java.util.Set;
@@ -195,7 +195,7 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
 
     private final ShardPath path;
 
-    private final IndexShardOperationsLock indexShardOperationsLock;
+    private final IndexShardOperationPermits indexShardOperationPermits;
 
     private static final EnumSet<IndexShardState> readAllowedStates = EnumSet.of(IndexShardState.STARTED, IndexShardState.RELOCATED, IndexShardState.POST_RECOVERY);
     // for primaries, we only allow to write when actually started (so the cluster has decided we started)
@@ -272,7 +272,7 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
             }
             this.cachingPolicy = cachingPolicy;
         }
-        indexShardOperationsLock = new IndexShardOperationsLock(shardId, logger, threadPool);
+        indexShardOperationPermits = new IndexShardOperationPermits(shardId, logger, threadPool);
         searcherWrapper = indexSearcherWrapper;
         primaryTerm = indexSettings.getIndexMetaData().primaryTerm(shardId.id());
         refreshListeners = buildRefreshListeners();
@@ -328,7 +328,6 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
         return this.shardFieldData;
     }
 
-
     /**
      * Returns the primary term the index shard is on. See {@link org.elasticsearch.cluster.metadata.IndexMetaData#primaryTerm(int)}
      */
@@ -340,6 +339,7 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
      * notifies the shard of an increase in the primary term
      */
     public void updatePrimaryTerm(final long newTerm) {
+        assert shardRouting.primary() : "primary term can only be explicitly updated on a primary shard";
         synchronized (mutex) {
             if (newTerm != primaryTerm) {
                 // Note that due to cluster state batching an initializing primary shard term can failed and re-assigned
@@ -354,10 +354,13 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
                 //
                 // We could fail the shard in that case, but this will cause it to be removed from the insync allocations list
                 // potentially preventing re-allocation.
-                assert shardRouting.primary() == false || shardRouting.initializing() == false :
+                assert shardRouting.initializing() == false :
-                    "a started primary shard should never update it's term. shard: " + shardRouting
+                        "a started primary shard should never update its term; "
-                        + " current term [" + primaryTerm + "] new term [" + newTerm + "]";
+                                + "shard " + shardRouting + ", "
-                assert newTerm > primaryTerm : "primary terms can only go up. current [" + primaryTerm + "], new [" + newTerm + "]";
+                                + "current term [" + primaryTerm + "], "
+                                + "new term [" + newTerm + "]";
+                assert newTerm > primaryTerm :
+                        "primary terms can only go up; current term [" + primaryTerm + "], new term [" + newTerm + "]";
                 primaryTerm = newTerm;
             }
         }
@@ -457,9 +460,9 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
     public void relocated(String reason) throws IllegalIndexShardStateException, InterruptedException {
         assert shardRouting.primary() : "only primaries can be marked as relocated: " + shardRouting;
         try {
-            indexShardOperationsLock.blockOperations(30, TimeUnit.MINUTES, () -> {
+            indexShardOperationPermits.blockOperations(30, TimeUnit.MINUTES, () -> {
-                // no shard operation locks are being held here, move state from started to relocated
+                // no shard operation permits are being held here, move state from started to relocated
-                assert indexShardOperationsLock.getActiveOperationsCount() == 0 :
+                assert indexShardOperationPermits.getActiveOperationsCount() == 0 :
                     "in-flight operations in progress while moving shard state to relocated";
                 synchronized (mutex) {
                     if (state != IndexShardState.STARTED) {
@@ -974,7 +977,7 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
                     // playing safe here and close the engine even if the above succeeds - close can be called multiple times
                     // Also closing refreshListeners to prevent us from accumulating any more listeners
                     IOUtils.close(engine, refreshListeners);
-                    indexShardOperationsLock.close();
+                    indexShardOperationPermits.close();
                 }
             }
         }
@@ -1841,35 +1844,81 @@ public class IndexShard extends AbstractIndexShardComponent implements IndicesCl
     }
 
     /**
-     * Acquire a primary operation lock whenever the shard is ready for indexing. If the lock is directly available, the provided
+     * Acquire a primary operation permit whenever the shard is ready for indexing. If a permit is directly available, the provided
-     * ActionListener will be called on the calling thread. During relocation hand-off, lock acquisition can be delayed. The provided
+     * ActionListener will be called on the calling thread. During relocation hand-off, permit acquisition can be delayed. The provided
      * ActionListener will then be called using the provided executor.
      */
-    public void acquirePrimaryOperationLock(ActionListener<Releasable> onLockAcquired, String executorOnDelay) {
+    public void acquirePrimaryOperationPermit(ActionListener<Releasable> onPermitAcquired, String executorOnDelay) {
         verifyNotClosed();
         verifyPrimary();
 
-        indexShardOperationsLock.acquire(onLockAcquired, executorOnDelay, false);
+        indexShardOperationPermits.acquire(onPermitAcquired, executorOnDelay, false);
     }
 
+    private final Object primaryTermMutex = new Object();
+
     /**
-     * Acquire a replica operation lock whenever the shard is ready for indexing (see acquirePrimaryOperationLock). If the given primary
+     * Acquire a replica operation permit whenever the shard is ready for indexing (see
-     * term is lower then the one in {@link #shardRouting} an {@link IllegalArgumentException} is thrown.
+     * {@link #acquirePrimaryOperationPermit(ActionListener, String)}). If the given primary term is lower than then one in
+     * {@link #shardRouting}, the {@link ActionListener#onFailure(Exception)} method of the provided listener is invoked with an
+     * {@link IllegalStateException}. If permit acquisition is delayed, the listener will be invoked on the executor with the specified
+     * name.
+     *
+     * @param operationPrimaryTerm the operation primary term
+     * @param onPermitAcquired     the listener for permit acquisition
+     * @param executorOnDelay      the name of the executor to invoke the listener on if permit acquisition is delayed
      */
-    public void acquireReplicaOperationLock(long opPrimaryTerm, ActionListener<Releasable> onLockAcquired, String executorOnDelay) {
+    public void acquireReplicaOperationPermit(
+            final long operationPrimaryTerm, final ActionListener<Releasable> onPermitAcquired, final String executorOnDelay) {
         verifyNotClosed();
         verifyReplicationTarget();
-        if (primaryTerm > opPrimaryTerm) {
+        if (operationPrimaryTerm > primaryTerm) {
-            // must use exception that is not ignored by replication logic. See TransportActions.isShardNotAvailableException
+            synchronized (primaryTermMutex) {
-            throw new IllegalArgumentException(LoggerMessageFormat.format("{} operation term [{}] is too old (current [{}])",
+                if (operationPrimaryTerm > primaryTerm) {
-                shardId, opPrimaryTerm, primaryTerm));
+                    try {
+                        indexShardOperationPermits.blockOperations(30, TimeUnit.MINUTES, () -> {
+                            assert operationPrimaryTerm > primaryTerm;
+                            primaryTerm = operationPrimaryTerm;
+                        });
+                    } catch (final InterruptedException | TimeoutException e) {
+                        onPermitAcquired.onFailure(e);
+                        return;
+                    }
+                }
+            }
         }
 
-        indexShardOperationsLock.acquire(onLockAcquired, executorOnDelay, true);
+        assert operationPrimaryTerm <= primaryTerm
+                : "operation primary term [" + operationPrimaryTerm + "] should be at most [" + primaryTerm + "]";
+        indexShardOperationPermits.acquire(
+                new ActionListener<Releasable>() {
+                    @Override
+                    public void onResponse(final Releasable releasable) {
+                        if (operationPrimaryTerm < primaryTerm) {
+                            releasable.close();
+                            final String message = String.format(
+                                    Locale.ROOT,
+                                    "%s operation primary term [%d] is too old (current [%d])",
+                                    shardId,
+                                    operationPrimaryTerm,
+                                    primaryTerm);
+                            onPermitAcquired.onFailure(new IllegalStateException(message));
+                        } else {
+                            onPermitAcquired.onResponse(releasable);
+                        }
+                    }
+
+                    @Override
+                    public void onFailure(final Exception e) {
+                        onPermitAcquired.onFailure(e);
+                    }
+                },
+                executorOnDelay,
+                true);
     }
 
     public int getActiveOperationsCount() {
-        return indexShardOperationsLock.getActiveOperationsCount(); // refCount is incremented on successful acquire and decremented on close
+        return indexShardOperationPermits.getActiveOperationsCount(); // refCount is incremented on successful acquire and decremented on close
     }
 
     private final AsyncIOProcessor<Translog.Location> translogSyncProcessor = new AsyncIOProcessor<Translog.Location>(logger, 1024) {

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

@@ -16,6 +16,7 @@
  * specific language governing permissions and limitations
  * under the License.
  */
+
 package org.elasticsearch.index.shard;
 
 import org.apache.logging.log4j.Logger;
@@ -36,7 +37,7 @@ import java.util.concurrent.TimeoutException;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.function.Supplier;
 
-public class IndexShardOperationsLock implements Closeable {
+final class IndexShardOperationPermits implements Closeable {
     private final ShardId shardId;
     private final Logger logger;
     private final ThreadPool threadPool;
@@ -44,10 +45,10 @@ public class IndexShardOperationsLock implements Closeable {
     private static final int TOTAL_PERMITS = Integer.MAX_VALUE;
     // fair semaphore to ensure that blockOperations() does not starve under thread contention
     final Semaphore semaphore = new Semaphore(TOTAL_PERMITS, true);
-    @Nullable private List<ActionListener<Releasable>> delayedOperations; // operations that are delayed due to relocation hand-off
+    @Nullable private List<ActionListener<Releasable>> delayedOperations; // operations that are delayed
     private volatile boolean closed;
 
-    public IndexShardOperationsLock(ShardId shardId, Logger logger, ThreadPool threadPool) {
+    IndexShardOperationPermits(ShardId shardId, Logger logger, ThreadPool threadPool) {
         this.shardId = shardId;
         this.logger = logger;
         this.threadPool = threadPool;
@@ -67,7 +68,7 @@ public class IndexShardOperationsLock implements Closeable {
      * @param onBlocked the action to run once the block has been acquired
      * @throws InterruptedException if calling thread is interrupted
      * @throws TimeoutException if timed out waiting for in-flight operations to finish
-     * @throws IndexShardClosedException if operation lock has been closed
+     * @throws IndexShardClosedException if operation permit has been closed
      */
     public void blockOperations(long timeout, TimeUnit timeUnit, Runnable onBlocked) throws InterruptedException, TimeoutException {
         if (closed) {
@@ -75,6 +76,7 @@ public class IndexShardOperationsLock implements Closeable {
         }
         try {
             if (semaphore.tryAcquire(TOTAL_PERMITS, timeout, timeUnit)) {
+                assert semaphore.availablePermits() == 0;
                 try {
                     onBlocked.run();
                 } finally {
@@ -91,7 +93,7 @@ public class IndexShardOperationsLock implements Closeable {
             }
             if (queuedActions != null) {
                 // Try acquiring permits on fresh thread (for two reasons):
-                // - blockOperations is called on recovery thread which can be expected to be interrupted when recovery is cancelled.
+                // - blockOperations can be called on recovery thread which can be expected to be interrupted when recovery is cancelled.
                 //   Interruptions are bad here as permit acquisition will throw an InterruptedException which will be swallowed by
                 //   ThreadedActionListener if the queue of the thread pool on which it submits is full.
                 // - if permit is acquired and queue of the thread pool which the ThreadedActionListener uses is full, the onFailure
@@ -106,12 +108,12 @@ public class IndexShardOperationsLock implements Closeable {
     }
 
     /**
-     * Acquires a lock whenever lock acquisition is not blocked. If the lock is directly available, the provided
+     * Acquires a permit whenever permit acquisition is not blocked. If the permit is directly available, the provided
-     * ActionListener will be called on the calling thread. During calls of {@link #blockOperations(long, TimeUnit, Runnable)}, lock
+     * {@link ActionListener} will be called on the calling thread. During calls of {@link #blockOperations(long, TimeUnit, Runnable)},
-     * acquisition can be delayed. The provided ActionListener will then be called using the provided executor once blockOperations
+     * permit acquisition can be delayed. The provided ActionListener will then be called using the provided executor once operations are no
-     * terminates.
+     * longer blocked.
      *
-     * @param onAcquired ActionListener that is invoked once acquisition is successful or failed
+     * @param onAcquired      {@link ActionListener} that is invoked once acquisition is successful or failed
      * @param executorOnDelay executor to use for delayed call
      * @param forceExecution  whether the runnable should force its execution in case it gets rejected
      */

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

@@ -561,6 +561,7 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent imple
                         allocationIdsForShardsOnNodesThatUnderstandSeqNos(indexShardRoutingTable.activeShards(), nodes);
                 final Set<String> initializingIds =
                         allocationIdsForShardsOnNodesThatUnderstandSeqNos(indexShardRoutingTable.getAllInitializingShards(), nodes);
+                shard.updatePrimaryTerm(clusterState.metaData().index(shard.shardId().getIndex()).primaryTerm(shard.shardId().id()));
                 shard.updateAllocationIdsFromMaster(activeIds, initializingIds);
             }
         } catch (Exception e) {
@@ -737,6 +738,13 @@ public class IndicesClusterStateService extends AbstractLifecycleComponent imple
          */
         void updateRoutingEntry(ShardRouting shardRouting) throws IOException;
 
+        /**
+         * Update the primary term. This method should only be invoked on primary shards.
+         *
+         * @param primaryTerm the new primary term
+         */
+        void updatePrimaryTerm(long primaryTerm);
+
         /**
          * Notifies the service of the current allocation ids in the cluster state.
          * See {@link GlobalCheckpointTracker#updateAllocationIdsFromMaster(Set, Set)} for details.

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

@@ -48,11 +48,4 @@ public interface ScriptEngine extends Closeable {
     ExecutableScript executable(CompiledScript compiledScript, @Nullable Map<String, Object> vars);
 
     SearchScript search(CompiledScript compiledScript, SearchLookup lookup, @Nullable Map<String, Object> vars);
-
-    /**
-     * Returns <code>true</code> if this scripting engine can safely accept inline scripts by default. The default is <code>false</code>
-     */
-    default boolean isInlineScriptEnabled() {
-        return false;
-    }
 }

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

@@ -1,77 +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.script;
-
-import java.util.Collections;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.Objects;
-
-public class ScriptEngineRegistry {
-
-    private final Map<Class<? extends ScriptEngine>, String> registeredScriptEngineServices;
-    private final Map<String, ScriptEngine> registeredLanguages;
-    private final Map<String, Boolean> defaultInlineScriptEnableds;
-
-    public ScriptEngineRegistry(Iterable<ScriptEngine> registrations) {
-        Objects.requireNonNull(registrations);
-        Map<Class<? extends ScriptEngine>, String> registeredScriptEngineServices = new HashMap<>();
-        Map<String, ScriptEngine> registeredLanguages = new HashMap<>();
-        Map<String, Boolean> inlineScriptEnableds = new HashMap<>();
-        for (ScriptEngine service : registrations) {
-            String oldLanguage = registeredScriptEngineServices.putIfAbsent(service.getClass(),
-                    service.getType());
-            if (oldLanguage != null) {
-                throw new IllegalArgumentException("script engine service [" + service.getClass() +
-                                "] already registered for language [" + oldLanguage + "]");
-            }
-            String language = service.getType();
-            ScriptEngine scriptEngine =
-                    registeredLanguages.putIfAbsent(language, service);
-            if (scriptEngine != null) {
-                throw new IllegalArgumentException("scripting language [" + language + "] already registered for script engine service [" +
-                    scriptEngine.getClass().getCanonicalName() + "]");
-            }
-            inlineScriptEnableds.put(language, service.isInlineScriptEnabled());
-        }
-
-        this.registeredScriptEngineServices = Collections.unmodifiableMap(registeredScriptEngineServices);
-        this.registeredLanguages = Collections.unmodifiableMap(registeredLanguages);
-        this.defaultInlineScriptEnableds = Collections.unmodifiableMap(inlineScriptEnableds);
-    }
-
-    Iterable<Class<? extends ScriptEngine>> getRegisteredScriptEngineServices() {
-        return registeredScriptEngineServices.keySet();
-    }
-
-    String getLanguage(Class<? extends ScriptEngine> scriptEngineService) {
-        Objects.requireNonNull(scriptEngineService);
-        return registeredScriptEngineServices.get(scriptEngineService);
-    }
-
-    public Map<String, ScriptEngine> getRegisteredLanguages() {
-        return registeredLanguages;
-    }
-
-    public Map<String, Boolean> getDefaultInlineScriptEnableds() {
-        return this.defaultInlineScriptEnableds;
-    }
-
-}

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

@@ -24,7 +24,10 @@ import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.plugins.ScriptPlugin;
 
 import java.io.IOException;
+import java.util.Collections;
+import java.util.HashMap;
 import java.util.List;
+import java.util.Map;
 import java.util.Objects;
 import java.util.stream.Collectors;
 
@@ -52,14 +55,26 @@ public class ScriptModule {
     public ScriptModule(Settings settings, List<ScriptEngine> scriptEngines,
                         List<ScriptContext.Plugin> customScriptContexts) {
         ScriptContextRegistry scriptContextRegistry = new ScriptContextRegistry(customScriptContexts);
-        ScriptEngineRegistry scriptEngineRegistry = new ScriptEngineRegistry(scriptEngines);
+        Map<String, ScriptEngine> enginesByName = getEnginesByName(scriptEngines);
         try {
-            scriptService = new ScriptService(settings, scriptEngineRegistry, scriptContextRegistry);
+            scriptService = new ScriptService(settings, enginesByName, scriptContextRegistry);
         } catch (IOException e) {
             throw new RuntimeException("Couldn't setup ScriptService", e);
         }
     }
 
+    private Map<String, ScriptEngine> getEnginesByName(List<ScriptEngine> engines) {
+        Map<String, ScriptEngine> enginesByName = new HashMap<>();
+        for (ScriptEngine engine : engines) {
+            ScriptEngine existing = enginesByName.put(engine.getType(), engine);
+            if (existing != null) {
+                throw new IllegalArgumentException("scripting language [" + engine.getType() + "] defined for engine [" +
+                    existing.getClass().getName() + "] and [" + engine.getClass().getName());
+            }
+        }
+        return Collections.unmodifiableMap(enginesByName);
+    }
+
     /**
      * Service responsible for managing scripts.
      */

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

@@ -96,11 +96,11 @@ public class ScriptService extends AbstractComponent implements Closeable, Clust
     private double scriptsPerMinCounter;
     private double compilesAllowedPerNano;
 
-    public ScriptService(Settings settings, ScriptEngineRegistry scriptEngineRegistry, ScriptContextRegistry scriptContextRegistry) throws IOException {
+    public ScriptService(Settings settings, Map<String, ScriptEngine> engines, ScriptContextRegistry scriptContextRegistry) throws IOException {
         super(settings);
 
         Objects.requireNonNull(settings);
-        Objects.requireNonNull(scriptEngineRegistry);
+        this.engines = Objects.requireNonNull(engines);
         Objects.requireNonNull(scriptContextRegistry);
 
         if (Strings.hasLength(settings.get(DISABLE_DYNAMIC_SCRIPTING_SETTING))) {
@@ -192,8 +192,6 @@ public class ScriptService extends AbstractComponent implements Closeable, Clust
         logger.debug("using script cache with max_size [{}], expire [{}]", cacheMaxSize, cacheExpire);
         this.cache = cacheBuilder.removalListener(new ScriptCacheRemovalListener()).build();
 
-        this.engines = scriptEngineRegistry.getRegisteredLanguages();
-
         this.lastInlineCompileTime = System.nanoTime();
         this.setMaxCompilationsPerMinute(SCRIPT_MAX_COMPILATIONS_PER_MINUTE.get(settings));
     }
@@ -510,14 +508,6 @@ public class ScriptService extends AbstractComponent implements Closeable, Clust
         return getEngine(compiledScript.lang()).executable(compiledScript, params);
     }
 
-    /**
-     * Compiles (or retrieves from cache) and executes the provided search script
-     */
-    public SearchScript search(SearchLookup lookup, Script script, ScriptContext scriptContext) {
-        CompiledScript compiledScript = compile(script, scriptContext);
-        return search(lookup, compiledScript, script.getParams());
-    }
-
     /**
      * Binds provided parameters to a compiled script returning a
      * {@link SearchScript} ready for execution

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

@@ -48,6 +48,7 @@ import org.elasticsearch.index.shard.IndexShard;
 import org.elasticsearch.index.shard.SearchOperationListener;
 import org.elasticsearch.indices.IndicesService;
 import org.elasticsearch.indices.cluster.IndicesClusterStateService.AllocatedIndices.IndexRemovalReason;
+import org.elasticsearch.script.CompiledScript;
 import org.elasticsearch.script.ScriptContext;
 import org.elasticsearch.script.ScriptService;
 import org.elasticsearch.script.SearchScript;
@@ -685,7 +686,8 @@ public class SearchService extends AbstractLifecycleComponent implements IndexEv
         }
         if (source.scriptFields() != null) {
             for (org.elasticsearch.search.builder.SearchSourceBuilder.ScriptField field : source.scriptFields()) {
-                SearchScript searchScript = scriptService.search(context.lookup(), field.script(), ScriptContext.Standard.SEARCH);
+                CompiledScript compile = scriptService.compile(field.script(), ScriptContext.Standard.SEARCH);
+                SearchScript searchScript = scriptService.search(context.lookup(), compile, field.script().getParams());
                 context.scriptFields().add(new ScriptField(field.fieldName(), searchScript, field.ignoreFailure()));
             }
         }

core/src/test/java/org/elasticsearch/action/bulk/TransportBulkActionIndicesThatCannotBeCreatedTests.java

@@ -31,6 +31,7 @@ import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.unit.TimeValue;
 import org.elasticsearch.common.util.concurrent.AtomicArray;
 import org.elasticsearch.index.IndexNotFoundException;
+import org.elasticsearch.index.VersionType;
 import org.elasticsearch.tasks.Task;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.transport.TransportService;
@@ -66,7 +67,7 @@ public class TransportBulkActionIndicesThatCannotBeCreatedTests extends ESTestCa
         BulkRequest bulkRequest = new BulkRequest();
         bulkRequest.add(new IndexRequest("no"));
         bulkRequest.add(new IndexRequest("can't"));
-        bulkRequest.add(new DeleteRequest("do"));
+        bulkRequest.add(new DeleteRequest("do").version(0).versionType(VersionType.EXTERNAL));
         bulkRequest.add(new UpdateRequest("nothin", randomAlphaOfLength(5), randomAlphaOfLength(5)));
         indicesThatCannotBeCreatedTestCase(new HashSet<>(Arrays.asList("no", "can't", "do", "nothin")), bulkRequest, index -> {
             throw new IndexNotFoundException("Can't make it because I say so");

core/src/test/java/org/elasticsearch/action/bulk/TransportBulkActionTests.java

@@ -0,0 +1,135 @@
+/*
+ * 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.bulk;
+
+import org.elasticsearch.action.ActionListener;
+import org.elasticsearch.action.admin.indices.create.CreateIndexResponse;
+import org.elasticsearch.action.bulk.TransportBulkActionTookTests.Resolver;
+import org.elasticsearch.action.delete.DeleteRequest;
+import org.elasticsearch.action.support.ActionFilters;
+import org.elasticsearch.action.support.AutoCreateIndex;
+import org.elasticsearch.cluster.service.ClusterService;
+import org.elasticsearch.common.settings.Settings;
+import org.elasticsearch.common.unit.TimeValue;
+import org.elasticsearch.index.IndexNotFoundException;
+import org.elasticsearch.index.VersionType;
+import org.elasticsearch.test.ESTestCase;
+import org.elasticsearch.test.transport.CapturingTransport;
+import org.elasticsearch.threadpool.TestThreadPool;
+import org.elasticsearch.threadpool.ThreadPool;
+import org.elasticsearch.transport.TransportService;
+import org.junit.After;
+import org.junit.Before;
+
+import java.util.Collections;
+import java.util.concurrent.TimeUnit;
+
+import static org.elasticsearch.test.ClusterServiceUtils.createClusterService;
+
+public class TransportBulkActionTests extends ESTestCase {
+
+    /** Services needed by bulk action */
+    private TransportService transportService;
+    private ClusterService clusterService;
+    private ThreadPool threadPool;
+    
+    private TestTransportBulkAction bulkAction;
+
+    class TestTransportBulkAction extends TransportBulkAction {
+
+        boolean indexCreated = false; // set when the "real" index is created
+
+        TestTransportBulkAction() {
+            super(Settings.EMPTY, TransportBulkActionTests.this.threadPool, transportService, clusterService, null, null,
+                    null, new ActionFilters(Collections.emptySet()), new Resolver(Settings.EMPTY),
+                    new AutoCreateIndex(Settings.EMPTY, clusterService.getClusterSettings(), new Resolver(Settings.EMPTY)));
+        }
+
+        @Override
+        protected boolean needToCheck() {
+            return true;
+        }
+
+        @Override
+        void createIndex(String index, TimeValue timeout, ActionListener<CreateIndexResponse> listener) {
+            indexCreated = true;
+            listener.onResponse(null);
+        }
+    }
+
+    @Before
+    public void setUp() throws Exception {
+        super.setUp();
+        threadPool = new TestThreadPool("TransportBulkActionTookTests");
+        clusterService = createClusterService(threadPool);
+        CapturingTransport capturingTransport = new CapturingTransport();
+        transportService = new TransportService(clusterService.getSettings(), capturingTransport, threadPool,
+                TransportService.NOOP_TRANSPORT_INTERCEPTOR,
+            boundAddress -> clusterService.localNode(), null);
+        transportService.start();
+        transportService.acceptIncomingRequests();
+        bulkAction = new TestTransportBulkAction();
+    }
+
+    @After
+    public void tearDown() throws Exception {
+        ThreadPool.terminate(threadPool, 30, TimeUnit.SECONDS);
+        threadPool = null;
+        clusterService.close();
+        super.tearDown();
+    }
+
+    public void testDeleteNonExistingDocDoesNotCreateIndex() throws Exception {
+        BulkRequest bulkRequest = new BulkRequest().add(new DeleteRequest("index", "type", "id"));
+
+        bulkAction.execute(null, bulkRequest, ActionListener.wrap(response -> {
+            assertFalse(bulkAction.indexCreated);
+            BulkItemResponse[] bulkResponses = ((BulkResponse) response).getItems();
+            assertEquals(bulkResponses.length, 1);
+            assertTrue(bulkResponses[0].isFailed());
+            assertTrue(bulkResponses[0].getFailure().getCause() instanceof IndexNotFoundException);
+            assertEquals("index", bulkResponses[0].getFailure().getIndex());
+        }, exception -> {
+            throw new AssertionError(exception);
+        }));
+    }
+
+    public void testDeleteNonExistingDocExternalVersionCreatesIndex() throws Exception {
+        BulkRequest bulkRequest = new BulkRequest()
+                .add(new DeleteRequest("index", "type", "id").versionType(VersionType.EXTERNAL).version(0));
+
+        bulkAction.execute(null, bulkRequest, ActionListener.wrap(response -> {
+            assertTrue(bulkAction.indexCreated);
+        }, exception -> {
+            throw new AssertionError(exception);
+        }));
+    }
+
+    public void testDeleteNonExistingDocExternalGteVersionCreatesIndex() throws Exception {
+        BulkRequest bulkRequest = new BulkRequest()
+                .add(new DeleteRequest("index2", "type", "id").versionType(VersionType.EXTERNAL_GTE).version(0));
+
+        bulkAction.execute(null, bulkRequest, ActionListener.wrap(response -> {
+            assertTrue(bulkAction.indexCreated);
+        }, exception -> {
+            throw new AssertionError(exception);
+        }));
+    }
+}

core/src/test/java/org/elasticsearch/action/support/replication/TransportReplicationActionTests.java

@@ -1091,7 +1091,7 @@ public class TransportReplicationActionTests extends ESTestCase {
             count.incrementAndGet();
             callback.onResponse(count::decrementAndGet);
             return null;
-        }).when(indexShard).acquirePrimaryOperationLock(any(ActionListener.class), anyString());
+        }).when(indexShard).acquirePrimaryOperationPermit(any(ActionListener.class), anyString());
         doAnswer(invocation -> {
             long term = (Long)invocation.getArguments()[0];
             ActionListener<Releasable> callback = (ActionListener<Releasable>) invocation.getArguments()[1];
@@ -1103,7 +1103,7 @@ public class TransportReplicationActionTests extends ESTestCase {
             count.incrementAndGet();
             callback.onResponse(count::decrementAndGet);
             return null;
-        }).when(indexShard).acquireReplicaOperationLock(anyLong(), any(ActionListener.class), anyString());
+        }).when(indexShard).acquireReplicaOperationPermit(anyLong(), any(ActionListener.class), anyString());
         when(indexShard.routingEntry()).thenAnswer(invocationOnMock -> {
             final ClusterState state = clusterService.state();
             final RoutingNode node = state.getRoutingNodes().node(state.nodes().getLocalNodeId());

core/src/test/java/org/elasticsearch/action/support/replication/TransportWriteActionTests.java

@@ -444,7 +444,7 @@ public class TransportWriteActionTests extends ESTestCase {
             count.incrementAndGet();
             callback.onResponse(count::decrementAndGet);
             return null;
-        }).when(indexShard).acquirePrimaryOperationLock(any(ActionListener.class), anyString());
+        }).when(indexShard).acquirePrimaryOperationPermit(any(ActionListener.class), anyString());
         doAnswer(invocation -> {
             long term = (Long)invocation.getArguments()[0];
             ActionListener<Releasable> callback = (ActionListener<Releasable>) invocation.getArguments()[1];
@@ -456,7 +456,7 @@ public class TransportWriteActionTests extends ESTestCase {
             count.incrementAndGet();
             callback.onResponse(count::decrementAndGet);
             return null;
-        }).when(indexShard).acquireReplicaOperationLock(anyLong(), any(ActionListener.class), anyString());
+        }).when(indexShard).acquireReplicaOperationPermit(anyLong(), any(ActionListener.class), anyString());
         when(indexShard.routingEntry()).thenAnswer(invocationOnMock -> {
             final ClusterState state = clusterService.state();
             final RoutingNode node = state.getRoutingNodes().node(state.nodes().getLocalNodeId());

core/src/test/java/org/elasticsearch/action/update/UpdateRequestTests.java

@@ -43,12 +43,10 @@ import org.elasticsearch.index.shard.ShardId;
 import org.elasticsearch.script.MockScriptEngine;
 import org.elasticsearch.script.Script;
 import org.elasticsearch.script.ScriptContextRegistry;
-import org.elasticsearch.script.ScriptEngineRegistry;
 import org.elasticsearch.script.ScriptService;
 import org.elasticsearch.script.ScriptType;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.test.RandomObjects;
-import org.elasticsearch.watcher.ResourceWatcherService;
 import org.junit.Before;
 
 import java.io.IOException;
@@ -60,7 +58,6 @@ import java.util.function.Function;
 
 import static java.util.Collections.emptyList;
 import static java.util.Collections.emptyMap;
-import static java.util.Collections.singletonList;
 import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
 import static org.elasticsearch.common.xcontent.XContentHelper.toXContent;
 import static org.elasticsearch.script.MockScriptEngine.mockInlineScript;
@@ -140,14 +137,10 @@ public class UpdateRequestTests extends ESTestCase {
         scripts.put("return", vars -> null);
         final ScriptContextRegistry scriptContextRegistry = new ScriptContextRegistry(emptyList());
         final MockScriptEngine engine = new MockScriptEngine("mock", scripts);
-        final ScriptEngineRegistry scriptEngineRegistry =
-                new ScriptEngineRegistry(singletonList(engine));
 
-        final ResourceWatcherService watcherService =
-                new ResourceWatcherService(baseSettings, null);
         ScriptService scriptService = new ScriptService(
                 baseSettings,
-                scriptEngineRegistry,
+                Collections.singletonMap(engine.getType(), engine),
                 scriptContextRegistry);
         final Settings settings = settings(Version.CURRENT).build();
 

core/src/test/java/org/elasticsearch/cluster/routing/allocation/ShardStateIT.java

@@ -18,9 +18,12 @@
  */
 package org.elasticsearch.cluster.routing.allocation;
 
+import org.elasticsearch.action.index.IndexRequest;
 import org.elasticsearch.cluster.ClusterState;
 import org.elasticsearch.cluster.health.ClusterHealthStatus;
 import org.elasticsearch.cluster.metadata.IndexMetaData;
+import org.elasticsearch.cluster.routing.Murmur3HashFunction;
+import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.IndexService;
 import org.elasticsearch.index.shard.IndexShard;
 import org.elasticsearch.indices.IndicesService;
@@ -48,10 +51,23 @@ public class ShardStateIT extends ESIntegTestCase {
         indicesService.indexService(resolveIndex("test")).getShard(shard).failShard("simulated test failure", null);
 
         logger.info("--> waiting for a yellow index");
-        // JDK 9 type inference gets confused, so we have to help the
+        ensureYellow();
-        // type inference
+
-        assertBusy(((Runnable) () -> assertThat(client().admin().cluster().prepareHealth().get().getStatus(),
+        // this forces the primary term to propagate to the replicas
-                equalTo(ClusterHealthStatus.YELLOW))));
+        int id = 0;
+        while (true) {
+            // find an ID that routes to the right shard, we will only index to the shard that saw a primary failure
+            final String idAsString = Integer.toString(id);
+            final int hash = Math.floorMod(Murmur3HashFunction.hash(idAsString), 2);
+            if (hash == shard) {
+                client()
+                        .index(new IndexRequest("test", "type", idAsString).source("{ \"f\": \"" + idAsString + "\"}", XContentType.JSON))
+                        .get();
+                break;
+            } else {
+                id++;
+            }
+        }
 
         final long term0 = shard == 0 ? 2 : 1;
         final long term1 = shard == 1 ? 2 : 1;
@@ -63,13 +79,13 @@ public class ShardStateIT extends ESIntegTestCase {
         assertPrimaryTerms(term0, term1);
     }
 
-    protected void assertPrimaryTerms(long term0, long term1) {
+    protected void assertPrimaryTerms(long shard0Term, long shard1Term) {
         for (String node : internalCluster().getNodeNames()) {
             logger.debug("--> asserting primary terms terms on [{}]", node);
             ClusterState state = client(node).admin().cluster().prepareState().setLocal(true).get().getState();
             IndexMetaData metaData = state.metaData().index("test");
-            assertThat(metaData.primaryTerm(0), equalTo(term0));
+            assertThat(metaData.primaryTerm(0), equalTo(shard0Term));
-            assertThat(metaData.primaryTerm(1), equalTo(term1));
+            assertThat(metaData.primaryTerm(1), equalTo(shard1Term));
             IndicesService indicesService = internalCluster().getInstance(IndicesService.class, node);
             IndexService indexService = indicesService.indexService(metaData.getIndex());
             if (indexService != null) {

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

@@ -68,7 +68,6 @@ import org.elasticsearch.indices.cluster.IndicesClusterStateService.AllocatedInd
 import org.elasticsearch.indices.fielddata.cache.IndicesFieldDataCache;
 import org.elasticsearch.indices.mapper.MapperRegistry;
 import org.elasticsearch.script.ScriptContextRegistry;
-import org.elasticsearch.script.ScriptEngineRegistry;
 import org.elasticsearch.script.ScriptService;
 import org.elasticsearch.search.internal.SearchContext;
 import org.elasticsearch.test.ClusterServiceUtils;
@@ -78,14 +77,12 @@ import org.elasticsearch.test.TestSearchContext;
 import org.elasticsearch.test.engine.MockEngineFactory;
 import org.elasticsearch.threadpool.TestThreadPool;
 import org.elasticsearch.threadpool.ThreadPool;
-import org.elasticsearch.watcher.ResourceWatcherService;
 
 import java.io.IOException;
 import java.util.Collections;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 
-import static java.util.Collections.emptyList;
 import static java.util.Collections.emptyMap;
 
 public class IndexModuleTests extends ESTestCase {
@@ -128,9 +125,8 @@ public class IndexModuleTests extends ESTestCase {
         threadPool = new TestThreadPool("test");
         circuitBreakerService = new NoneCircuitBreakerService();
         bigArrays = new BigArrays(settings, circuitBreakerService);
-        ScriptEngineRegistry scriptEngineRegistry = new ScriptEngineRegistry(emptyList());
         ScriptContextRegistry scriptContextRegistry = new ScriptContextRegistry(Collections.emptyList());
-        scriptService = new ScriptService(settings, scriptEngineRegistry, scriptContextRegistry);
+        scriptService = new ScriptService(settings, Collections.emptyMap(), scriptContextRegistry);
         clusterService = ClusterServiceUtils.createClusterService(threadPool);
         nodeEnvironment = new NodeEnvironment(settings, environment);
         mapperRegistry = new IndicesModule(Collections.emptyList()).getMapperRegistry();

core/src/test/java/org/elasticsearch/index/replication/ESIndexLevelReplicationTestCase.java

@@ -47,6 +47,8 @@ import org.elasticsearch.cluster.routing.ShardRoutingHelper;
 import org.elasticsearch.cluster.routing.ShardRoutingState;
 import org.elasticsearch.cluster.routing.TestShardRouting;
 import org.elasticsearch.common.collect.Iterators;
+import org.elasticsearch.common.lease.Releasable;
+import org.elasticsearch.common.lease.Releasables;
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.common.xcontent.XContentType;
 import org.elasticsearch.index.Index;
@@ -59,6 +61,7 @@ import org.elasticsearch.index.shard.ShardPath;
 import org.elasticsearch.index.translog.Translog;
 import org.elasticsearch.indices.recovery.RecoveryState;
 import org.elasticsearch.indices.recovery.RecoveryTarget;
+import org.elasticsearch.threadpool.ThreadPool;
 import org.elasticsearch.transport.TransportRequest;
 
 import java.io.IOException;
@@ -225,7 +228,6 @@ public abstract class ESIndexLevelReplicationTestCase extends IndexShardTestCase
             assert shardRoutings().stream()
                 .filter(shardRouting -> shardRouting.isSameAllocation(replica.routingEntry())).findFirst().isPresent() == false :
                 "replica with aId [" + replica.routingEntry().allocationId() + "] already exists";
-            replica.updatePrimaryTerm(primary.getPrimaryTerm());
             replicas.add(replica);
             updateAllocationIDsOnPrimary();
         }
@@ -254,17 +256,13 @@ public abstract class ESIndexLevelReplicationTestCase extends IndexShardTestCase
          */
         public synchronized void promoteReplicaToPrimary(IndexShard replica) throws IOException {
             final long newTerm = indexMetaData.primaryTerm(shardId.id()) + 1;
-            IndexMetaData.Builder newMetaData =
+            IndexMetaData.Builder newMetaData = IndexMetaData.builder(indexMetaData).primaryTerm(shardId.id(), newTerm);
-                IndexMetaData.builder(indexMetaData).primaryTerm(shardId.id(), newTerm);
             indexMetaData = newMetaData.build();
-            for (IndexShard shard: replicas) {
+            assertTrue(replicas.remove(replica));
-                shard.updatePrimaryTerm(newTerm);
-            }
-            boolean found = replicas.remove(replica);
-            assert found;
             closeShards(primary);
             primary = replica;
-            replica.updateRoutingEntry(replica.routingEntry().moveActiveReplicaToPrimary());
+            primary.updateRoutingEntry(replica.routingEntry().moveActiveReplicaToPrimary());
+            primary.updatePrimaryTerm(newTerm);
             updateAllocationIDsOnPrimary();
         }
 
@@ -476,17 +474,34 @@ public abstract class ESIndexLevelReplicationTestCase extends IndexShardTestCase
                 final ReplicaRequest request,
                 final long globalCheckpoint,
                 final ActionListener<ReplicationOperation.ReplicaResponse> listener) {
-                try {
                 IndexShard replica = replicationGroup.replicas.stream()
                         .filter(s -> replicaRouting.isSameAllocation(s.routingEntry())).findFirst().get();
+                replica.acquireReplicaOperationPermit(
+                        request.primaryTerm(),
+                        new ActionListener<Releasable>() {
+                            @Override
+                            public void onResponse(Releasable releasable) {
+                                try {
                                     replica.updateGlobalCheckpointOnReplica(globalCheckpoint);
                                     performOnReplica(request, replica);
-                    listener.onResponse(new ReplicaResponse(replica.routingEntry().allocationId().getId(), replica.getLocalCheckpoint()));
+                                    releasable.close();
-                } catch (Exception e) {
+                                    listener.onResponse(
+                                            new ReplicaResponse(
+                                                    replica.routingEntry().allocationId().getId(), replica.getLocalCheckpoint()));
+                                } catch (final Exception e) {
+                                    Releasables.closeWhileHandlingException(releasable);
                                     listener.onFailure(e);
                                 }
                             }
 
+                            @Override
+                            public void onFailure(Exception e) {
+                                listener.onFailure(e);
+                            }
+                        },
+                        ThreadPool.Names.INDEX);
+            }
+
             @Override
             public void failShardIfNeeded(ShardRouting replica, long primaryTerm, String message, Exception exception,
                                           Runnable onSuccess, Consumer<Exception> onPrimaryDemoted,

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

@@ -37,16 +37,15 @@ import java.util.concurrent.ExecutionException;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.TimeoutException;
 import java.util.function.Function;
-import java.util.function.Supplier;
 
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.instanceOf;
 
-public class IndexShardOperationsLockTests extends ESTestCase {
+public class IndexShardOperationPermitsTests extends ESTestCase {
 
     private static ThreadPool threadPool;
 
-    private IndexShardOperationsLock block;
+    private IndexShardOperationPermits permits;
 
     @BeforeClass
     public static void setupThreadPool() {
@@ -61,13 +60,13 @@ public class IndexShardOperationsLockTests extends ESTestCase {
 
     @Before
     public void createIndexShardOperationsLock() {
-         block = new IndexShardOperationsLock(new ShardId("blubb", "id", 0), logger, threadPool);
+         permits = new IndexShardOperationPermits(new ShardId("blubb", "id", 0), logger, threadPool);
     }
 
     @After
     public void checkNoInflightOperations() {
-        assertThat(block.semaphore.availablePermits(), equalTo(Integer.MAX_VALUE));
+        assertThat(permits.semaphore.availablePermits(), equalTo(Integer.MAX_VALUE));
-        assertThat(block.getActiveOperationsCount(), equalTo(0));
+        assertThat(permits.getActiveOperationsCount(), equalTo(0));
     }
 
     public void testAllOperationsInvoked() throws InterruptedException, TimeoutException, ExecutionException {
@@ -87,7 +86,7 @@ public class IndexShardOperationsLockTests extends ESTestCase {
             Thread thread = new Thread() {
                 public void run() {
                     latch.countDown();
-                    block.acquire(future, ThreadPool.Names.GENERIC, true);
+                    permits.acquire(future, ThreadPool.Names.GENERIC, true);
                 }
             };
             futures.add(future);
@@ -123,29 +122,29 @@ public class IndexShardOperationsLockTests extends ESTestCase {
 
     public void testOperationsInvokedImmediatelyIfNoBlock() throws ExecutionException, InterruptedException {
         PlainActionFuture<Releasable> future = new PlainActionFuture<>();
-        block.acquire(future, ThreadPool.Names.GENERIC, true);
+        permits.acquire(future, ThreadPool.Names.GENERIC, true);
         assertTrue(future.isDone());
         future.get().close();
     }
 
     public void testOperationsIfClosed() throws ExecutionException, InterruptedException {
         PlainActionFuture<Releasable> future = new PlainActionFuture<>();
-        block.close();
+        permits.close();
-        block.acquire(future, ThreadPool.Names.GENERIC, true);
+        permits.acquire(future, ThreadPool.Names.GENERIC, true);
         ExecutionException exception = expectThrows(ExecutionException.class, future::get);
         assertThat(exception.getCause(), instanceOf(IndexShardClosedException.class));
     }
 
     public void testBlockIfClosed() throws ExecutionException, InterruptedException {
-        block.close();
+        permits.close();
-        expectThrows(IndexShardClosedException.class, () -> block.blockOperations(randomInt(10), TimeUnit.MINUTES,
+        expectThrows(IndexShardClosedException.class, () -> permits.blockOperations(randomInt(10), TimeUnit.MINUTES,
             () -> { throw new IllegalArgumentException("fake error"); }));
     }
 
     public void testOperationsDelayedIfBlock() throws ExecutionException, InterruptedException, TimeoutException {
         PlainActionFuture<Releasable> future = new PlainActionFuture<>();
         try (Releasable releasable = blockAndWait()) {
-            block.acquire(future, ThreadPool.Names.GENERIC, true);
+            permits.acquire(future, ThreadPool.Names.GENERIC, true);
             assertFalse(future.isDone());
         }
         future.get(1, TimeUnit.HOURS).close();
@@ -192,8 +191,8 @@ public class IndexShardOperationsLockTests extends ESTestCase {
                 context.putHeader("foo", "bar");
                 context.putTransient("bar", "baz");
                 // test both with and without a executor name
-                block.acquire(future, ThreadPool.Names.GENERIC, true);
+                permits.acquire(future, ThreadPool.Names.GENERIC, true);
-                block.acquire(future2, null, true);
+                permits.acquire(future2, null, true);
             }
             assertFalse(future.isDone());
         }
@@ -209,7 +208,7 @@ public class IndexShardOperationsLockTests extends ESTestCase {
         IndexShardClosedException exception = new IndexShardClosedException(new ShardId("blubb", "id", 0));
         threadPool.generic().execute(() -> {
                 try {
-                    block.blockOperations(1, TimeUnit.MINUTES, () -> {
+                    permits.blockOperations(1, TimeUnit.MINUTES, () -> {
                         try {
                             blockAcquired.countDown();
                             releaseBlock.await();
@@ -241,31 +240,31 @@ public class IndexShardOperationsLockTests extends ESTestCase {
 
     public void testActiveOperationsCount() throws ExecutionException, InterruptedException {
         PlainActionFuture<Releasable> future1 = new PlainActionFuture<>();
-        block.acquire(future1, ThreadPool.Names.GENERIC, true);
+        permits.acquire(future1, ThreadPool.Names.GENERIC, true);
         assertTrue(future1.isDone());
-        assertThat(block.getActiveOperationsCount(), equalTo(1));
+        assertThat(permits.getActiveOperationsCount(), equalTo(1));
 
         PlainActionFuture<Releasable> future2 = new PlainActionFuture<>();
-        block.acquire(future2, ThreadPool.Names.GENERIC, true);
+        permits.acquire(future2, ThreadPool.Names.GENERIC, true);
         assertTrue(future2.isDone());
-        assertThat(block.getActiveOperationsCount(), equalTo(2));
+        assertThat(permits.getActiveOperationsCount(), equalTo(2));
 
         future1.get().close();
-        assertThat(block.getActiveOperationsCount(), equalTo(1));
+        assertThat(permits.getActiveOperationsCount(), equalTo(1));
         future1.get().close(); // check idempotence
-        assertThat(block.getActiveOperationsCount(), equalTo(1));
+        assertThat(permits.getActiveOperationsCount(), equalTo(1));
         future2.get().close();
-        assertThat(block.getActiveOperationsCount(), equalTo(0));
+        assertThat(permits.getActiveOperationsCount(), equalTo(0));
 
         try (Releasable releasable = blockAndWait()) {
-            assertThat(block.getActiveOperationsCount(), equalTo(0));
+            assertThat(permits.getActiveOperationsCount(), equalTo(0));
         }
 
         PlainActionFuture<Releasable> future3 = new PlainActionFuture<>();
-        block.acquire(future3, ThreadPool.Names.GENERIC, true);
+        permits.acquire(future3, ThreadPool.Names.GENERIC, true);
         assertTrue(future3.isDone());
-        assertThat(block.getActiveOperationsCount(), equalTo(1));
+        assertThat(permits.getActiveOperationsCount(), equalTo(1));
         future3.get().close();
-        assertThat(block.getActiveOperationsCount(), equalTo(0));
+        assertThat(permits.getActiveOperationsCount(), equalTo(0));
     }
 }

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

@@ -33,6 +33,7 @@ import org.apache.lucene.store.AlreadyClosedException;
 import org.apache.lucene.store.IOContext;
 import org.apache.lucene.util.Constants;
 import org.elasticsearch.Version;
+import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.admin.indices.flush.FlushRequest;
 import org.elasticsearch.action.admin.indices.forcemerge.ForceMergeRequest;
 import org.elasticsearch.action.admin.indices.stats.CommonStats;
@@ -118,8 +119,12 @@ import java.util.concurrent.Semaphore;
 import java.util.concurrent.TimeUnit;
 import java.util.concurrent.atomic.AtomicBoolean;
 import java.util.concurrent.atomic.AtomicInteger;
+import java.util.concurrent.atomic.AtomicLong;
 import java.util.concurrent.atomic.AtomicReference;
 import java.util.function.BiConsumer;
+import java.util.function.BiFunction;
+import java.util.function.Function;
+import java.util.function.LongFunction;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 
@@ -130,11 +135,13 @@ import static org.elasticsearch.common.xcontent.ToXContent.EMPTY_PARAMS;
 import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
 import static org.elasticsearch.index.engine.Engine.Operation.Origin.PRIMARY;
 import static org.elasticsearch.repositories.RepositoryData.EMPTY_REPO_GEN;
+import static org.elasticsearch.test.hamcrest.RegexMatcher.matches;
 import static org.hamcrest.Matchers.containsString;
 import static org.hamcrest.Matchers.equalTo;
 import static org.hamcrest.Matchers.greaterThan;
 import static org.hamcrest.Matchers.hasKey;
 import static org.hamcrest.Matchers.hasSize;
+import static org.hamcrest.Matchers.hasToString;
 import static org.hamcrest.Matchers.instanceOf;
 import static org.hamcrest.Matchers.nullValue;
 
@@ -262,20 +269,20 @@ public class IndexShardTests extends IndexShardTestCase {
         closeShards(indexShard);
         assertThat(indexShard.getActiveOperationsCount(), equalTo(0));
         try {
-            indexShard.acquirePrimaryOperationLock(null, ThreadPool.Names.INDEX);
+            indexShard.acquirePrimaryOperationPermit(null, ThreadPool.Names.INDEX);
             fail("we should not be able to increment anymore");
         } catch (IndexShardClosedException e) {
             // expected
         }
         try {
-            indexShard.acquireReplicaOperationLock(indexShard.getPrimaryTerm(), null, ThreadPool.Names.INDEX);
+            indexShard.acquireReplicaOperationPermit(indexShard.getPrimaryTerm(), null, ThreadPool.Names.INDEX);
             fail("we should not be able to increment anymore");
         } catch (IndexShardClosedException e) {
             // expected
         }
     }
 
-    public void testOperationLocksOnPrimaryShards() throws InterruptedException, ExecutionException, IOException {
+    public void testOperationPermitsOnPrimaryShards() throws InterruptedException, ExecutionException, IOException {
         final ShardId shardId = new ShardId("test", "_na_", 0);
         final IndexShard indexShard;
 
@@ -287,10 +294,10 @@ public class IndexShardTests extends IndexShardTestCase {
             // simulate promotion
             indexShard = newStartedShard(false);
             ShardRouting replicaRouting = indexShard.routingEntry();
-            indexShard.updatePrimaryTerm(indexShard.getPrimaryTerm() + 1);
             ShardRouting primaryRouting = TestShardRouting.newShardRouting(replicaRouting.shardId(), replicaRouting.currentNodeId(), null,
                 true, ShardRoutingState.STARTED, replicaRouting.allocationId());
             indexShard.updateRoutingEntry(primaryRouting);
+            indexShard.updatePrimaryTerm(indexShard.getPrimaryTerm() + 1);
         } else {
             indexShard = newStartedShard(true);
         }
@@ -298,15 +305,15 @@ public class IndexShardTests extends IndexShardTestCase {
         assertEquals(0, indexShard.getActiveOperationsCount());
         if (indexShard.routingEntry().isRelocationTarget() == false) {
             try {
-                indexShard.acquireReplicaOperationLock(primaryTerm, null, ThreadPool.Names.INDEX);
+                indexShard.acquireReplicaOperationPermit(primaryTerm, null, ThreadPool.Names.INDEX);
                 fail("shard shouldn't accept operations as replica");
             } catch (IllegalStateException ignored) {
 
             }
         }
-        Releasable operation1 = acquirePrimaryOperationLockBlockingly(indexShard);
+        Releasable operation1 = acquirePrimaryOperationPermitBlockingly(indexShard);
         assertEquals(1, indexShard.getActiveOperationsCount());
-        Releasable operation2 = acquirePrimaryOperationLockBlockingly(indexShard);
+        Releasable operation2 = acquirePrimaryOperationPermitBlockingly(indexShard);
         assertEquals(2, indexShard.getActiveOperationsCount());
 
         Releasables.close(operation1, operation2);
@@ -315,20 +322,20 @@ public class IndexShardTests extends IndexShardTestCase {
         closeShards(indexShard);
     }
 
-    private Releasable acquirePrimaryOperationLockBlockingly(IndexShard indexShard) throws ExecutionException, InterruptedException {
+    private Releasable acquirePrimaryOperationPermitBlockingly(IndexShard indexShard) throws ExecutionException, InterruptedException {
         PlainActionFuture<Releasable> fut = new PlainActionFuture<>();
-        indexShard.acquirePrimaryOperationLock(fut, ThreadPool.Names.INDEX);
+        indexShard.acquirePrimaryOperationPermit(fut, ThreadPool.Names.INDEX);
         return fut.get();
     }
 
-    private Releasable acquireReplicaOperationLockBlockingly(IndexShard indexShard, long opPrimaryTerm)
+    private Releasable acquireReplicaOperationPermitBlockingly(IndexShard indexShard, long opPrimaryTerm)
         throws ExecutionException, InterruptedException {
         PlainActionFuture<Releasable> fut = new PlainActionFuture<>();
-        indexShard.acquireReplicaOperationLock(opPrimaryTerm, fut, ThreadPool.Names.INDEX);
+        indexShard.acquireReplicaOperationPermit(opPrimaryTerm, fut, ThreadPool.Names.INDEX);
         return fut.get();
     }
 
-    public void testOperationLocksOnReplicaShards() throws InterruptedException, ExecutionException, IOException {
+    public void testOperationPermitOnReplicaShards() throws InterruptedException, ExecutionException, IOException, BrokenBarrierException {
         final ShardId shardId = new ShardId("test", "_na_", 0);
         final IndexShard indexShard;
 
@@ -367,33 +374,165 @@ public class IndexShardTests extends IndexShardTestCase {
 
         assertEquals(0, indexShard.getActiveOperationsCount());
         if (shardRouting.primary() == false) {
-            try {
+            final IllegalStateException e =
-                indexShard.acquirePrimaryOperationLock(null, ThreadPool.Names.INDEX);
+                    expectThrows(IllegalStateException.class, () -> indexShard.acquirePrimaryOperationPermit(null, ThreadPool.Names.INDEX));
-                fail("shard shouldn't accept primary ops");
+            assertThat(e, hasToString(containsString("shard is not a primary")));
-            } catch (IllegalStateException ignored) {
-
-            }
         }
 
         final long primaryTerm = indexShard.getPrimaryTerm();
 
-        Releasable operation1 = acquireReplicaOperationLockBlockingly(indexShard, primaryTerm);
+        final Releasable operation1 = acquireReplicaOperationPermitBlockingly(indexShard, primaryTerm);
         assertEquals(1, indexShard.getActiveOperationsCount());
-        Releasable operation2 = acquireReplicaOperationLockBlockingly(indexShard, primaryTerm);
+        final Releasable operation2 = acquireReplicaOperationPermitBlockingly(indexShard, primaryTerm);
         assertEquals(2, indexShard.getActiveOperationsCount());
 
-        try {
+        {
-            indexShard.acquireReplicaOperationLock(primaryTerm - 1, null, ThreadPool.Names.INDEX);
+            final AtomicBoolean onResponse = new AtomicBoolean();
-            fail("you can not increment the operation counter with an older primary term");
+            final AtomicBoolean onFailure = new AtomicBoolean();
-        } catch (IllegalArgumentException e) {
+            final AtomicReference<Exception> onFailureException = new AtomicReference<>();
-            assertThat(e.getMessage(), containsString("operation term"));
+            ActionListener<Releasable> onLockAcquired = new ActionListener<Releasable>() {
-            assertThat(e.getMessage(), containsString("too old"));
+                @Override
+                public void onResponse(Releasable releasable) {
+                    onResponse.set(true);
                 }
 
-        // but you can increment with a newer one..
+                @Override
-        acquireReplicaOperationLockBlockingly(indexShard, primaryTerm + 1 + randomInt(20)).close();
+                public void onFailure(Exception e) {
-        Releasables.close(operation1, operation2);
+                    onFailure.set(true);
+                    onFailureException.set(e);
+                }
+            };
+
+            indexShard.acquireReplicaOperationPermit(primaryTerm - 1, onLockAcquired, ThreadPool.Names.INDEX);
+
+            assertFalse(onResponse.get());
+            assertTrue(onFailure.get());
+            assertThat(onFailureException.get(), instanceOf(IllegalStateException.class));
+            assertThat(
+                    onFailureException.get(), hasToString(containsString("operation primary term [" + (primaryTerm - 1) + "] is too old")));
+        }
+
+        {
+            final AtomicBoolean onResponse = new AtomicBoolean();
+            final AtomicBoolean onFailure = new AtomicBoolean();
+            final CyclicBarrier barrier = new CyclicBarrier(2);
+            // but you can not increment with a new primary term until the operations on the older primary term complete
+            final Thread thread = new Thread(() -> {
+                try {
+                    barrier.await();
+                } catch (final BrokenBarrierException | InterruptedException e) {
+                    throw new RuntimeException(e);
+                }
+                indexShard.acquireReplicaOperationPermit(
+                        primaryTerm + 1 + randomInt(20),
+                        new ActionListener<Releasable>() {
+                            @Override
+                            public void onResponse(Releasable releasable) {
+                                onResponse.set(true);
+                                releasable.close();
+                                try {
+                                    barrier.await();
+                                } catch (final BrokenBarrierException | InterruptedException e) {
+                                    throw new RuntimeException(e);
+                                }
+                            }
+
+                            @Override
+                            public void onFailure(Exception e) {
+                                onFailure.set(true);
+                            }
+                        },
+                        ThreadPool.Names.SAME);
+            });
+            thread.start();
+            barrier.await();
+            // our operation should be blocked until the previous operations complete
+            assertFalse(onResponse.get());
+            assertFalse(onFailure.get());
+            Releasables.close(operation1);
+            // our operation should still be blocked
+            assertFalse(onResponse.get());
+            assertFalse(onFailure.get());
+            Releasables.close(operation2);
+            barrier.await();
+            // now lock acquisition should have succeeded
+            assertTrue(onResponse.get());
+            assertFalse(onFailure.get());
+            thread.join();
             assertEquals(0, indexShard.getActiveOperationsCount());
+        }
+
+        closeShards(indexShard);
+    }
+
+    public void testConcurrentTermIncreaseOnReplicaShard() throws BrokenBarrierException, InterruptedException, IOException {
+        final IndexShard indexShard = newStartedShard(false);
+
+        final CyclicBarrier barrier = new CyclicBarrier(3);
+        final CountDownLatch latch = new CountDownLatch(2);
+
+        final long primaryTerm = indexShard.getPrimaryTerm();
+        final AtomicLong counter = new AtomicLong();
+        final AtomicReference<Exception> onFailure = new AtomicReference<>();
+
+        final LongFunction<Runnable> function = increment -> () -> {
+            assert increment > 0;
+            try {
+                barrier.await();
+            } catch (final BrokenBarrierException | InterruptedException e) {
+                throw new RuntimeException(e);
+            }
+            indexShard.acquireReplicaOperationPermit(
+                    primaryTerm + increment,
+                    new ActionListener<Releasable>() {
+                        @Override
+                        public void onResponse(Releasable releasable) {
+                            counter.incrementAndGet();
+                            assertThat(indexShard.getPrimaryTerm(), equalTo(primaryTerm + increment));
+                            latch.countDown();
+                            releasable.close();
+                        }
+
+                        @Override
+                        public void onFailure(Exception e) {
+                            onFailure.set(e);
+                            latch.countDown();
+                        }
+                    },
+                    ThreadPool.Names.INDEX);
+        };
+
+        final long firstIncrement = 1 + (randomBoolean() ? 0 : 1);
+        final long secondIncrement = 1 + (randomBoolean() ? 0 : 1);
+        final Thread first = new Thread(function.apply(firstIncrement));
+        final Thread second = new Thread(function.apply(secondIncrement));
+
+        first.start();
+        second.start();
+
+        // the two threads synchronize attempting to acquire an operation permit
+        barrier.await();
+
+        // we wait for both operations to complete
+        latch.await();
+
+        first.join();
+        second.join();
+
+        final Exception e;
+        if ((e = onFailure.get()) != null) {
+            /*
+             * If one thread tried to set the primary term to a higher value than the other thread and the thread with the higher term won
+             * the race, then the other thread lost the race and only one operation should have been executed.
+             */
+            assertThat(e, instanceOf(IllegalStateException.class));
+            assertThat(e, hasToString(matches("operation primary term \\[\\d+\\] is too old")));
+            assertThat(counter.get(), equalTo(1L));
+        } else {
+            assertThat(counter.get(), equalTo(2L));
+        }
+
+        assertThat(indexShard.getPrimaryTerm(), equalTo(primaryTerm + Math.max(firstIncrement, secondIncrement)));
 
         closeShards(indexShard);
     }
@@ -701,7 +840,7 @@ public class IndexShardTests extends IndexShardTestCase {
             }
         });
 
-        try (Releasable ignored = acquirePrimaryOperationLockBlockingly(shard)) {
+        try (Releasable ignored = acquirePrimaryOperationPermitBlockingly(shard)) {
             // start finalization of recovery
             recoveryThread.start();
             latch.await();
@@ -711,7 +850,7 @@ public class IndexShardTests extends IndexShardTestCase {
         // recovery can be now finalized
         recoveryThread.join();
         assertThat(shard.state(), equalTo(IndexShardState.RELOCATED));
-        try (Releasable ignored = acquirePrimaryOperationLockBlockingly(shard)) {
+        try (Releasable ignored = acquirePrimaryOperationPermitBlockingly(shard)) {
             // lock can again be acquired
             assertThat(shard.state(), equalTo(IndexShardState.RELOCATED));
         }
@@ -740,7 +879,7 @@ public class IndexShardTests extends IndexShardTestCase {
                     super.onResponse(releasable);
                 }
             };
-            shard.acquirePrimaryOperationLock(onLockAcquired, ThreadPool.Names.INDEX);
+            shard.acquirePrimaryOperationPermit(onLockAcquired, ThreadPool.Names.INDEX);
             onLockAcquiredActions.add(onLockAcquired);
         }
 
@@ -764,7 +903,7 @@ public class IndexShardTests extends IndexShardTestCase {
             indexThreads[i] = new Thread() {
                 @Override
                 public void run() {
-                    try (Releasable operationLock = acquirePrimaryOperationLockBlockingly(shard)) {
+                    try (Releasable operationLock = acquirePrimaryOperationPermitBlockingly(shard)) {
                         allPrimaryOperationLocksAcquired.countDown();
                         barrier.await();
                     } catch (InterruptedException | BrokenBarrierException | ExecutionException e) {

core/src/test/java/org/elasticsearch/indices/cluster/AbstractIndicesClusterStateServiceTestCase.java

@@ -362,6 +362,11 @@ public abstract class AbstractIndicesClusterStateServiceTestCase extends ESTestC
             this.shardRouting = shardRouting;
         }
 
+        @Override
+        public void updatePrimaryTerm(long primaryTerm) {
+            term = primaryTerm;
+        }
+
         @Override
         public void updateAllocationIdsFromMaster(Set<String> activeAllocationIds, Set<String> initializingAllocationIds) {
             this.activeAllocationIds = activeAllocationIds;

core/src/test/java/org/elasticsearch/indices/flush/SyncedFlushSingleNodeTests.java

@@ -114,7 +114,7 @@ public class SyncedFlushSingleNodeTests extends ESSingleNodeTestCase {
         SyncedFlushService flushService = getInstanceFromNode(SyncedFlushService.class);
         final ShardId shardId = shard.shardId();
         PlainActionFuture<Releasable> fut = new PlainActionFuture<>();
-        shard.acquirePrimaryOperationLock(fut, ThreadPool.Names.INDEX);
+        shard.acquirePrimaryOperationPermit(fut, ThreadPool.Names.INDEX);
         try (Releasable operationLock = fut.get()) {
             SyncedFlushUtil.LatchedListener<ShardsSyncedFlushResult> listener = new SyncedFlushUtil.LatchedListener<>();
             flushService.attemptSyncedFlush(shardId, listener);

core/src/test/java/org/elasticsearch/script/ScriptContextTests.java

@@ -30,6 +30,7 @@ import org.elasticsearch.test.ESTestCase;
 import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
+import java.util.Map;
 
 public class ScriptContextTests extends ESTestCase {
 
@@ -42,13 +43,13 @@ public class ScriptContextTests extends ESTestCase {
             .build();
 
         MockScriptEngine scriptEngine = new MockScriptEngine(MockScriptEngine.NAME, Collections.singletonMap("1", script -> "1"));
-        ScriptEngineRegistry scriptEngineRegistry = new ScriptEngineRegistry(Collections.singletonList(scriptEngine));
+        Map<String, ScriptEngine> engines = Collections.singletonMap(scriptEngine.getType(), scriptEngine);
         List<ScriptContext.Plugin> customContexts = Arrays.asList(
             new ScriptContext.Plugin(PLUGIN_NAME, "custom_op"),
             new ScriptContext.Plugin(PLUGIN_NAME, "custom_exp_disabled_op"),
             new ScriptContext.Plugin(PLUGIN_NAME, "custom_globally_disabled_op"));
         ScriptContextRegistry scriptContextRegistry = new ScriptContextRegistry(customContexts);
-        ScriptService scriptService = new ScriptService(settings, scriptEngineRegistry, scriptContextRegistry);
+        ScriptService scriptService = new ScriptService(settings, engines, scriptContextRegistry);
 
         ClusterState empty = ClusterState.builder(new ClusterName("_name")).build();
         ScriptMetaData smd = empty.metaData().custom(ScriptMetaData.TYPE);

core/src/test/java/org/elasticsearch/script/ScriptServiceTests.java

@@ -54,8 +54,7 @@ public class ScriptServiceTests extends ESTestCase {
 
     private ScriptEngine scriptEngine;
     private ScriptEngine dangerousScriptEngine;
-    private Map<String, ScriptEngine> scriptEnginesByLangMap;
+    private Map<String, ScriptEngine> engines;
-    private ScriptEngineRegistry scriptEngineRegistry;
     private ScriptContextRegistry scriptContextRegistry;
     private ScriptContext[] scriptContexts;
     private ScriptService scriptService;
@@ -77,7 +76,6 @@ public class ScriptServiceTests extends ESTestCase {
                 .put(ScriptService.SCRIPT_MAX_COMPILATIONS_PER_MINUTE.getKey(), 10000)
                 .build();
         scriptEngine = new TestEngine();
-        dangerousScriptEngine = new TestDangerousEngine();
         TestEngine defaultScriptServiceEngine = new TestEngine(Script.DEFAULT_SCRIPT_LANG) {};
         //randomly register custom script contexts
         int randomInt = randomIntBetween(0, 3);
@@ -95,8 +93,9 @@ public class ScriptServiceTests extends ESTestCase {
             String context = plugin + "_" + operation;
             contexts.put(context, new ScriptContext.Plugin(plugin, operation));
         }
-        scriptEngineRegistry = new ScriptEngineRegistry(Arrays.asList(scriptEngine, dangerousScriptEngine,
+        engines = new HashMap<>();
-                defaultScriptServiceEngine));
+        engines.put(scriptEngine.getType(), scriptEngine);
+        engines.put(defaultScriptServiceEngine.getType(), defaultScriptServiceEngine);
         scriptContextRegistry = new ScriptContextRegistry(contexts.values());
         scriptContexts = scriptContextRegistry.scriptContexts().toArray(new ScriptContext[scriptContextRegistry.scriptContexts().size()]);
         logger.info("--> setup script service");
@@ -104,7 +103,7 @@ public class ScriptServiceTests extends ESTestCase {
 
     private void buildScriptService(Settings additionalSettings) throws IOException {
         Settings finalSettings = Settings.builder().put(baseSettings).put(additionalSettings).build();
-        scriptService = new ScriptService(finalSettings, scriptEngineRegistry, scriptContextRegistry) {
+        scriptService = new ScriptService(finalSettings, engines, scriptContextRegistry) {
             @Override
             StoredScriptSource getScriptFromClusterState(String id, String lang) {
                 //mock the script that gets retrieved from an index
@@ -245,7 +244,9 @@ public class ScriptServiceTests extends ESTestCase {
 
     public void testSearchCountedInCompilationStats() throws IOException {
         buildScriptService(Settings.EMPTY);
-        scriptService.search(null, new Script(ScriptType.INLINE, "test", "1+1", Collections.emptyMap()), randomFrom(scriptContexts));
+        Script script = new Script(ScriptType.INLINE, "test", "1+1", Collections.emptyMap());
+        CompiledScript compile = scriptService.compile(script, randomFrom(scriptContexts));
+        scriptService.search(null, compile, script.getParams());
         assertEquals(1L, scriptService.stats().getCompilations());
     }
 
@@ -388,39 +389,5 @@ public class ScriptServiceTests extends ESTestCase {
         public void close() {
 
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
-    }
-
-    public static class TestDangerousEngine implements ScriptEngine {
-
-        public static final String NAME = "dtest";
-
-        @Override
-        public String getType() {
-            return NAME;
-        }
-
-        @Override
-        public Object compile(String scriptName, String scriptSource, Map<String, String> params) {
-            return "compiled_" + scriptSource;
-        }
-
-        @Override
-        public ExecutableScript executable(final CompiledScript compiledScript, @Nullable Map<String, Object> vars) {
-            return null;
-        }
-
-        @Override
-        public SearchScript search(CompiledScript compiledScript, SearchLookup lookup, @Nullable Map<String, Object> vars) {
-            return null;
-        }
-
-        @Override
-        public void close() {
-        }
     }
 }

core/src/test/java/org/elasticsearch/search/aggregations/metrics/AvgIT.java

@@ -588,10 +588,5 @@ public class AvgIT extends AbstractNumericTestCase {
                 }
             };
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
     }
 }

core/src/test/java/org/elasticsearch/search/aggregations/metrics/SumIT.java

@@ -491,11 +491,6 @@ public class SumIT extends AbstractNumericTestCase {
                 }
             };
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
     }
 
     /**
@@ -597,10 +592,5 @@ public class SumIT extends AbstractNumericTestCase {
                 }
             };
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
     }
 }

core/src/test/java/org/elasticsearch/search/aggregations/metrics/ValueCountIT.java

@@ -344,10 +344,5 @@ public class ValueCountIT extends ESIntegTestCase {
                 }
             };
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
     }
 }

core/src/test/java/org/elasticsearch/search/aggregations/metrics/scripted/InternalScriptedMetricTests.java

@@ -23,11 +23,9 @@ import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.common.geo.GeoPoint;
 import org.elasticsearch.common.io.stream.Writeable.Reader;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.env.Environment;
 import org.elasticsearch.script.MockScriptEngine;
 import org.elasticsearch.script.Script;
 import org.elasticsearch.script.ScriptContextRegistry;
-import org.elasticsearch.script.ScriptEngineRegistry;
 import org.elasticsearch.script.ScriptService;
 import org.elasticsearch.script.ScriptType;
 import org.elasticsearch.search.aggregations.ParsedAggregation;
@@ -119,10 +117,9 @@ public class InternalScriptedMetricTests extends InternalAggregationTestCase<Int
                 Collections.singletonMap(REDUCE_SCRIPT_NAME, script -> {
                     return ((List<Object>) script.get("_aggs")).size();
                 }));
-        ScriptEngineRegistry scriptEngineRegistry = new ScriptEngineRegistry(Collections.singletonList(scriptEngine));
         ScriptContextRegistry scriptContextRegistry = new ScriptContextRegistry(Collections.emptyList());
         try {
-            return new ScriptService(Settings.EMPTY, scriptEngineRegistry, scriptContextRegistry);
+            return new ScriptService(Settings.EMPTY, Collections.singletonMap(scriptEngine.getType(), scriptEngine), scriptContextRegistry);
         } catch (IOException e) {
             throw new ElasticsearchException(e);
         }

core/src/test/java/org/elasticsearch/search/aggregations/metrics/scripted/ScriptedMetricAggregatorTests.java

@@ -27,7 +27,6 @@ import org.apache.lucene.search.MatchAllDocsQuery;
 import org.apache.lucene.store.Directory;
 import org.elasticsearch.ElasticsearchException;
 import org.elasticsearch.common.settings.Settings;
-import org.elasticsearch.env.Environment;
 import org.elasticsearch.index.mapper.MappedFieldType;
 import org.elasticsearch.index.mapper.MapperService;
 import org.elasticsearch.index.query.QueryShardContext;
@@ -36,7 +35,7 @@ import org.elasticsearch.script.MockScriptEngine;
 import org.elasticsearch.script.ScoreAccessor;
 import org.elasticsearch.script.Script;
 import org.elasticsearch.script.ScriptContextRegistry;
-import org.elasticsearch.script.ScriptEngineRegistry;
+import org.elasticsearch.script.ScriptEngine;
 import org.elasticsearch.script.ScriptService;
 import org.elasticsearch.script.ScriptType;
 import org.elasticsearch.search.aggregations.AggregatorTestCase;
@@ -198,11 +197,11 @@ public class ScriptedMetricAggregatorTests extends AggregatorTestCase {
     protected QueryShardContext queryShardContextMock(MapperService mapperService, final MappedFieldType[] fieldTypes,
             CircuitBreakerService circuitBreakerService) {
         MockScriptEngine scriptEngine = new MockScriptEngine(MockScriptEngine.NAME, SCRIPTS);
-        ScriptEngineRegistry scriptEngineRegistry = new ScriptEngineRegistry(Collections.singletonList(scriptEngine));
+        Map<String, ScriptEngine> engines = Collections.singletonMap(scriptEngine.getType(), scriptEngine);
         ScriptContextRegistry scriptContextRegistry = new ScriptContextRegistry(Collections.emptyList());
         ScriptService scriptService;
         try {
-            scriptService =  new ScriptService(Settings.EMPTY, scriptEngineRegistry, scriptContextRegistry);
+            scriptService =  new ScriptService(Settings.EMPTY, engines, scriptContextRegistry);
         } catch (IOException e) {
             throw new ElasticsearchException(e);
         }

core/src/test/java/org/elasticsearch/search/sort/AbstractSortTestCase.java

@@ -54,7 +54,7 @@ import org.elasticsearch.script.CompiledScript;
 import org.elasticsearch.script.Script;
 import org.elasticsearch.script.ScriptContext;
 import org.elasticsearch.script.ScriptContextRegistry;
-import org.elasticsearch.script.ScriptEngineRegistry;
+import org.elasticsearch.script.ScriptEngine;
 import org.elasticsearch.script.ScriptService;
 import org.elasticsearch.script.ScriptServiceTests.TestEngine;
 import org.elasticsearch.script.ScriptType;
@@ -62,7 +62,6 @@ import org.elasticsearch.search.DocValueFormat;
 import org.elasticsearch.search.SearchModule;
 import org.elasticsearch.test.ESTestCase;
 import org.elasticsearch.test.IndexSettingsModule;
-import org.elasticsearch.watcher.ResourceWatcherService;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
 
@@ -89,8 +88,8 @@ public abstract class AbstractSortTestCase<T extends SortBuilder<T>> extends EST
                 .put(Environment.PATH_CONF_SETTING.getKey(), genericConfigFolder)
                 .build();
         ScriptContextRegistry scriptContextRegistry = new ScriptContextRegistry(Collections.emptyList());
-        ScriptEngineRegistry scriptEngineRegistry = new ScriptEngineRegistry(Collections.singletonList(new TestEngine()));
+        ScriptEngine engine = new TestEngine();
-        scriptService = new ScriptService(baseSettings, scriptEngineRegistry, scriptContextRegistry) {
+        scriptService = new ScriptService(baseSettings, Collections.singletonMap(engine.getType(), engine), scriptContextRegistry) {
             @Override
             public CompiledScript compile(Script script, ScriptContext scriptContext) {
                 return new CompiledScript(ScriptType.INLINE, "mockName", "test", script);

core/src/test/java/org/elasticsearch/search/suggest/SuggestSearchIT.java

@@ -1059,11 +1059,6 @@ public class SuggestSearchIT extends ESIntegTestCase {
         public SearchScript search(CompiledScript compiledScript, SearchLookup lookup, Map<String, Object> vars) {
             throw new UnsupportedOperationException("search script not supported");
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
     }
 
     public void testPhraseSuggesterCollate() throws InterruptedException, ExecutionException, IOException {

core/src/test/java/org/elasticsearch/update/UpdateIT.java

@@ -132,11 +132,6 @@ public class UpdateIT extends ESIntegTestCase {
         public SearchScript search(CompiledScript compiledScript, SearchLookup lookup, Map<String, Object> vars) {
             throw new UnsupportedOperationException();
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
     }
 
     public static class FieldIncrementScriptPlugin extends Plugin implements ScriptPlugin {
@@ -193,11 +188,6 @@ public class UpdateIT extends ESIntegTestCase {
         public SearchScript search(CompiledScript compiledScript, SearchLookup lookup, Map<String, Object> vars) {
             throw new UnsupportedOperationException();
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
     }
 
     public static class ScriptedUpsertScriptPlugin extends Plugin implements ScriptPlugin {
@@ -254,12 +244,6 @@ public class UpdateIT extends ESIntegTestCase {
         public SearchScript search(CompiledScript compiledScript, SearchLookup lookup, Map<String, Object> vars) {
             throw new UnsupportedOperationException();
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
-
     }
 
     public static class ExtractContextInSourceScriptPlugin extends Plugin implements ScriptPlugin {
@@ -317,11 +301,6 @@ public class UpdateIT extends ESIntegTestCase {
         public SearchScript search(CompiledScript compiledScript, SearchLookup lookup, Map<String, Object> vars) {
             throw new UnsupportedOperationException();
         }
-
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
     }
 
     @Override

docs/reference/docs/delete.asciidoc

@@ -105,7 +105,8 @@ thrown instead.
 [[delete-index-creation]]
 === Automatic index creation
 
-The delete operation automatically creates an index if it has not been
+If an <<docs-index_,external versioning variant>> is used,
+the delete operation automatically creates an index if it has not been
 created before (check out the <<indices-create-index,create index API>>
 for manually creating an index), and also automatically creates a
 dynamic type mapping for the specific type if it has not been created

docs/reference/migration/migrate_6_0/indices.asciidoc

@@ -44,3 +44,9 @@ The default value of the `allow_no_indices` option for the Open/Close index API
 has been changed from `false` to `true` so it is aligned with the behaviour of the
 Delete index API. As a result, Open/Close index API don't return an error by
 default when a provided wildcard expression doesn't match any closed/open index.
+
+==== Delete a document
+
+Delete a document from non-existing index has been modified to not create the index.
+However if an external versioning is used the index will be created and the document
+will be marked for deletion. 

docs/reference/migration/migrate_6_0/mappings.asciidoc

@@ -26,6 +26,6 @@ now disallowed for these indices' mappings.
 
 ==== Unrecognized `match_mapping_type` options not silently ignored
 
-Previously Elastiscearch would silently ignore any dynamic templates that
+Previously Elasticsearch would silently ignore any dynamic templates that
 included a `match_mapping_type` type that was unrecognized. An exception is now
 thrown on an unrecognized type.

docs/reference/modules/threadpool.asciidoc

@@ -94,6 +94,8 @@ thread_pool:
 [float]
 ==== `fixed_auto_queue_size`
 
+experimental[]
+
 The `fixed_auto_queue_size` thread pool holds a fixed size of threads to handle
 the requests with a bounded queue for pending requests that have no threads to
 service them. It's similar to the `fixed` threadpool, however, the `queue_size`

modules/lang-expression/src/main/java/org/elasticsearch/script/expression/ExpressionScriptEngine.java

@@ -255,9 +255,4 @@ public class ExpressionScriptEngine extends AbstractComponent implements ScriptE
 
     @Override
     public void close() {}
-
-    @Override
-    public boolean isInlineScriptEnabled() {
-        return true;
-    }
 }

modules/lang-mustache/src/main/java/org/elasticsearch/script/mustache/MustacheScriptEngine.java

@@ -142,9 +142,4 @@ public final class MustacheScriptEngine implements ScriptEngine {
             return writer.toString();
         }
     }
-
-    @Override
-    public boolean isInlineScriptEnabled() {
-        return true;
-    }
 }

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

@@ -264,9 +264,4 @@ public final class PainlessScriptEngine extends AbstractComponent implements Scr
     private int getNextStatement(String scriptSource, int offset) {
         return Math.min(scriptSource.length(), offset + 25);
     }
-
-    @Override
-    public boolean isInlineScriptEnabled() {
-        return true;
-    }
 }

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

@@ -282,7 +282,7 @@ public class PercolatorFieldMapper extends FieldMapper {
         );
         verifyQuery(queryBuilder);
         // Fetching of terms, shapes and indexed scripts happen during this rewrite:
-        queryBuilder = queryBuilder.rewrite(queryShardContext);
+        queryBuilder = QueryBuilder.rewriteQuery(queryBuilder, queryShardContext);
 
         try (XContentBuilder builder = XContentFactory.contentBuilder(QUERY_BUILDER_CONTENT_TYPE)) {
             queryBuilder.toXContent(builder, new MapParams(Collections.emptyMap()));

plugins/analysis-icu/build.gradle

@@ -24,7 +24,7 @@ esplugin {
 
 dependencies {
   compile "org.apache.lucene:lucene-analyzers-icu:${versions.lucene}"
-  compile 'com.ibm.icu:icu4j:54.1'
+  compile 'com.ibm.icu:icu4j:56.1'
 }
 
 dependencyLicenses {

plugins/analysis-icu/licenses/icu4j-54.1.jar.sha1

@@ -1 +0,0 @@
-3f66ecd5871467598bc81662817b80612a0a907f

plugins/analysis-icu/licenses/icu4j-56.1.jar.sha1

@@ -0,0 +1 @@
+8dd6671f52165a0419e6de5e1016400875a90fa9

plugins/examples/script-expert-scoring/src/main/java/org/elasticsearch/example/expertscript/ExpertScriptPlugin.java

@@ -133,11 +133,6 @@ public class ExpertScriptPlugin extends Plugin implements ScriptPlugin {
             throw new UnsupportedOperationException();
         }
 
-        @Override
-        public boolean isInlineScriptEnabled() {
-            return true;
-        }
-
         @Override
         public void close() {}
     }

qa/smoke-test-ingest-with-all-dependencies/src/test/java/org/elasticsearch/ingest/AbstractScriptTestCase.java

@@ -21,13 +21,14 @@ package org.elasticsearch.ingest;
 
 import org.elasticsearch.common.settings.Settings;
 import org.elasticsearch.script.ScriptContextRegistry;
-import org.elasticsearch.script.ScriptEngineRegistry;
+import org.elasticsearch.script.ScriptEngine;
 import org.elasticsearch.script.ScriptService;
 import org.elasticsearch.script.mustache.MustacheScriptEngine;
 import org.elasticsearch.test.ESTestCase;
 import org.junit.Before;
 
 import java.util.Collections;
+import java.util.Map;
 
 public abstract class AbstractScriptTestCase extends ESTestCase {
 
@@ -35,9 +36,10 @@ public abstract class AbstractScriptTestCase extends ESTestCase {
 
     @Before
     public void init() throws Exception {
-        ScriptEngineRegistry scriptEngineRegistry = new ScriptEngineRegistry(Collections.singletonList(new MustacheScriptEngine()));
+        MustacheScriptEngine engine = new MustacheScriptEngine();
+        Map<String, ScriptEngine> engines = Collections.singletonMap(engine.getType(), engine);
         ScriptContextRegistry scriptContextRegistry = new ScriptContextRegistry(Collections.emptyList());
-        ScriptService scriptService = new ScriptService(Settings.EMPTY, scriptEngineRegistry, scriptContextRegistry);
+        ScriptService scriptService = new ScriptService(Settings.EMPTY, engines, scriptContextRegistry);
         templateService = new InternalTemplateService(scriptService);
     }
 

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

@@ -94,12 +94,6 @@ public class MockScriptEngine implements ScriptEngine {
     public void close() throws IOException {
     }
 
-    @Override
-    public boolean isInlineScriptEnabled() {
-        return true;
-    }
-
-
     public class MockCompiledScript {
 
         private final String name;