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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.admin.cluster.reroute;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.message.ParameterizedMessage;
import org.elasticsearch.ExceptionsHelper;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionListenerResponseHandler;
import org.elasticsearch.action.admin.indices.shards.IndicesShardStoresAction;
import org.elasticsearch.action.admin.indices.shards.IndicesShardStoresRequest;
import org.elasticsearch.action.admin.indices.shards.IndicesShardStoresResponse;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.TransportMasterNodeAction;
import org.elasticsearch.cluster.AckedClusterStateUpdateTask;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.node.DiscoveryNode;
import org.elasticsearch.cluster.routing.allocation.AllocationService;
import org.elasticsearch.cluster.routing.allocation.RoutingExplanations;
import org.elasticsearch.cluster.routing.allocation.command.AbstractAllocateAllocationCommand;
import org.elasticsearch.cluster.routing.allocation.command.AllocateStalePrimaryAllocationCommand;
import org.elasticsearch.cluster.routing.allocation.command.AllocationCommand;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.Strings;
import org.elasticsearch.common.collect.ImmutableOpenIntMap;
import org.elasticsearch.common.collect.ImmutableOpenMap;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.common.io.stream.StreamInput;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class TransportClusterRerouteAction extends TransportMasterNodeAction {
private static final Logger logger = LogManager.getLogger(TransportClusterRerouteAction.class);
private final AllocationService allocationService;
@Inject
public TransportClusterRerouteAction(TransportService transportService, ClusterService clusterService,
ThreadPool threadPool, AllocationService allocationService, ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver) {
super(ClusterRerouteAction.NAME, transportService, clusterService, threadPool, actionFilters,
ClusterRerouteRequest::new, indexNameExpressionResolver);
this.allocationService = allocationService;
}
@Override
protected String executor() {
// we go async right away
return ThreadPool.Names.SAME;
}
@Override
protected ClusterBlockException checkBlock(ClusterRerouteRequest request, ClusterState state) {
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_WRITE);
}
@Override
protected ClusterRerouteResponse read(StreamInput in) throws IOException {
return new ClusterRerouteResponse(in);
}
@Override
protected void masterOperation(final ClusterRerouteRequest request, final ClusterState state,
final ActionListener listener) {
Map> stalePrimaryAllocations = new HashMap<>();
for (AllocationCommand command : request.getCommands().commands()) {
if (command instanceof AllocateStalePrimaryAllocationCommand) {
final AllocateStalePrimaryAllocationCommand cmd = (AllocateStalePrimaryAllocationCommand) command;
stalePrimaryAllocations.computeIfAbsent(cmd.index(), k -> new ArrayList<>()).add(cmd);
}
}
if (stalePrimaryAllocations.isEmpty()) {
submitStateUpdate(request, listener);
} else {
verifyThenSubmitUpdate(request, listener, stalePrimaryAllocations);
}
}
private void verifyThenSubmitUpdate(ClusterRerouteRequest request, ActionListener listener,
Map> stalePrimaryAllocations) {
transportService.sendRequest(transportService.getLocalNode(), IndicesShardStoresAction.NAME,
new IndicesShardStoresRequest().indices(stalePrimaryAllocations.keySet().toArray(Strings.EMPTY_ARRAY)),
new ActionListenerResponseHandler<>(
ActionListener.wrap(
response -> {
ImmutableOpenMap>> status =
response.getStoreStatuses();
Exception e = null;
for (Map.Entry> entry : stalePrimaryAllocations.entrySet()) {
final String index = entry.getKey();
final ImmutableOpenIntMap> indexStatus = status.get(index);
if (indexStatus == null) {
// The index in the stale primary allocation request was green and hence filtered out by the store status
// request. We ignore it here since the relevant exception will be thrown by the reroute action later on.
continue;
}
for (AbstractAllocateAllocationCommand command : entry.getValue()) {
final List shardStatus =
indexStatus.get(command.shardId());
if (shardStatus == null || shardStatus.isEmpty()) {
e = ExceptionsHelper.useOrSuppress(e, new IllegalArgumentException(
"No data for shard [" + command.shardId() + "] of index [" + index + "] found on any node")
);
} else if (shardStatus.stream().noneMatch(storeStatus -> {
final DiscoveryNode node = storeStatus.getNode();
final String nodeInCommand = command.node();
return nodeInCommand.equals(node.getName()) || nodeInCommand.equals(node.getId());
})) {
e = ExceptionsHelper.useOrSuppress(e, new IllegalArgumentException(
"No data for shard [" + command.shardId() + "] of index [" + index + "] found on node ["
+ command.node() + ']'));
}
}
}
if (e == null) {
submitStateUpdate(request, listener);
} else {
listener.onFailure(e);
}
}, listener::onFailure
), IndicesShardStoresResponse::new));
}
private void submitStateUpdate(final ClusterRerouteRequest request, final ActionListener listener) {
clusterService.submitStateUpdateTask("cluster_reroute (api)",
new ClusterRerouteResponseAckedClusterStateUpdateTask(logger, allocationService, request,
ActionListener.map(listener,
response -> {
if (request.dryRun() == false) {
response.getExplanations().getYesDecisionMessages().forEach(logger::info);
}
return response;
})));
}
static class ClusterRerouteResponseAckedClusterStateUpdateTask extends AckedClusterStateUpdateTask {
private final ClusterRerouteRequest request;
private final ActionListener listener;
private final Logger logger;
private final AllocationService allocationService;
private volatile ClusterState clusterStateToSend;
private volatile RoutingExplanations explanations;
ClusterRerouteResponseAckedClusterStateUpdateTask(Logger logger, AllocationService allocationService, ClusterRerouteRequest request,
ActionListener listener) {
super(Priority.IMMEDIATE, request, listener);
this.request = request;
this.listener = listener;
this.logger = logger;
this.allocationService = allocationService;
}
@Override
protected ClusterRerouteResponse newResponse(boolean acknowledged) {
return new ClusterRerouteResponse(acknowledged, clusterStateToSend, explanations);
}
@Override
public void onAckTimeout() {
listener.onResponse(new ClusterRerouteResponse(false, clusterStateToSend, new RoutingExplanations()));
}
@Override
public void onFailure(String source, Exception e) {
logger.debug(() -> new ParameterizedMessage("failed to perform [{}]", source), e);
super.onFailure(source, e);
}
@Override
public ClusterState execute(ClusterState currentState) {
AllocationService.CommandsResult commandsResult =
allocationService.reroute(currentState, request.getCommands(), request.explain(), request.isRetryFailed());
clusterStateToSend = commandsResult.getClusterState();
explanations = commandsResult.explanations();
if (request.dryRun()) {
return currentState;
}
return commandsResult.getClusterState();
}
}
}