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/*
* 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.resync;
import org.elasticsearch.Version;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.TransportActions;
import org.elasticsearch.action.support.replication.ReplicationOperation;
import org.elasticsearch.action.support.replication.TransportReplicationAction;
import org.elasticsearch.action.support.replication.TransportWriteAction;
import org.elasticsearch.cluster.action.shard.ShardStateAction;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.index.engine.Engine;
import org.elasticsearch.index.seqno.SequenceNumbersService;
import org.elasticsearch.index.shard.IndexShard;
import org.elasticsearch.index.shard.PrimaryReplicaSyncer;
import org.elasticsearch.index.translog.Translog;
import org.elasticsearch.indices.IndicesService;
import org.elasticsearch.tasks.Task;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportException;
import org.elasticsearch.transport.TransportResponseHandler;
import org.elasticsearch.transport.TransportService;
import java.util.function.Supplier;
public class TransportResyncReplicationAction extends TransportWriteAction<ResyncReplicationRequest,
ResyncReplicationRequest, ResyncReplicationResponse> implements PrimaryReplicaSyncer.SyncAction {
public static String ACTION_NAME = "indices:admin/seq_no/resync";
@Inject
public TransportResyncReplicationAction(Settings settings, TransportService transportService,
ClusterService clusterService, IndicesService indicesService, ThreadPool threadPool,
ShardStateAction shardStateAction, ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver) {
super(settings, ACTION_NAME, transportService, clusterService, indicesService, threadPool, shardStateAction, actionFilters,
indexNameExpressionResolver, ResyncReplicationRequest::new, ResyncReplicationRequest::new, ThreadPool.Names.BULK);
}
@Override
protected void registerRequestHandlers(String actionName, TransportService transportService, Supplier<ResyncReplicationRequest> request,
Supplier<ResyncReplicationRequest> replicaRequest, String executor) {
transportService.registerRequestHandler(actionName, request, ThreadPool.Names.SAME, new OperationTransportHandler());
// we should never reject resync because of thread pool capacity on primary
transportService.registerRequestHandler(transportPrimaryAction,
() -> new ConcreteShardRequest<>(request),
executor, true, true,
new PrimaryOperationTransportHandler());
transportService.registerRequestHandler(transportReplicaAction,
() -> new ConcreteReplicaRequest<>(replicaRequest),
executor, true, true,
new ReplicaOperationTransportHandler());
}
@Override
protected ResyncReplicationResponse newResponseInstance() {
return new ResyncReplicationResponse();
}
@Override
protected ReplicationOperation.Replicas newReplicasProxy() {
// We treat the resync as best-effort for now and don't mark unavailable shard copies as stale.
return new ReplicasProxy();
}
@Override
protected void sendReplicaRequest(
final ConcreteReplicaRequest<ResyncReplicationRequest> replicaRequest,
final DiscoveryNode node,
final ActionListener<ReplicationOperation.ReplicaResponse> listener) {
if (node.getVersion().onOrAfter(Version.V_6_0_0_alpha1)) {
super.sendReplicaRequest(replicaRequest, node, listener);
} else {
listener.onResponse(new ReplicaResponse(replicaRequest.getTargetAllocationID(), SequenceNumbersService.UNASSIGNED_SEQ_NO));
}
}
@Override
protected WritePrimaryResult<ResyncReplicationRequest, ResyncReplicationResponse> shardOperationOnPrimary(
ResyncReplicationRequest request, IndexShard primary) throws Exception {
final ResyncReplicationRequest replicaRequest = performOnPrimary(request, primary);
return new WritePrimaryResult<>(replicaRequest, new ResyncReplicationResponse(), null, null, primary, logger);
}
public static ResyncReplicationRequest performOnPrimary(ResyncReplicationRequest request, IndexShard primary) {
return request;
}
@Override
protected WriteReplicaResult shardOperationOnReplica(ResyncReplicationRequest request, IndexShard replica) throws Exception {
Translog.Location location = performOnReplica(request, replica);
return new WriteReplicaResult(request, location, null, replica, logger);
}
public static Translog.Location performOnReplica(ResyncReplicationRequest request, IndexShard replica) throws Exception {
Translog.Location location = null;
for (Translog.Operation operation : request.getOperations()) {
try {
final Engine.Result operationResult = replica.applyTranslogOperation(operation, Engine.Operation.Origin.REPLICA,
update -> {
throw new TransportReplicationAction.RetryOnReplicaException(replica.shardId(),
"Mappings are not available on the replica yet, triggered update: " + update);
});
location = syncOperationResultOrThrow(operationResult, location);
} catch (Exception e) {
// if its not a failure to be ignored, let it bubble up
if (!TransportActions.isShardNotAvailableException(e)) {
throw e;
}
}
}
return location;
}
@Override
public void sync(ResyncReplicationRequest request, Task parentTask, String primaryAllocationId,
ActionListener<ResyncReplicationResponse> listener) {
// skip reroute phase
transportService.sendChildRequest(
clusterService.localNode(),
transportPrimaryAction,
new ConcreteShardRequest<>(request, primaryAllocationId),
parentTask,
transportOptions,
new TransportResponseHandler<ResyncReplicationResponse>() {
@Override
public ResyncReplicationResponse newInstance() {
return newResponseInstance();
}
@Override
public String executor() {
return ThreadPool.Names.SAME;
}
@Override
public void handleResponse(ResyncReplicationResponse response) {
listener.onResponse(response);
}
@Override
public void handleException(TransportException exp) {
final Throwable cause = exp.unwrapCause();
if (TransportActions.isShardNotAvailableException(cause)) {
logger.trace("primary became unavailable during resync, ignoring", exp);
} else {
listener.onFailure(exp);
}
}
});
}
}
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