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/*
* Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
* or more contributor license agreements. Licensed under the Elastic License
* 2.0 and the Server Side Public License, v 1; you may not use this file except
* in compliance with, at your election, the Elastic License 2.0 or the Server
* Side Public License, v 1.
*/
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.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
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,
ClusterRerouteResponse::new,
ThreadPool.Names.SAME
);
this.allocationService = allocationService;
}
@Override
protected ClusterBlockException checkBlock(ClusterRerouteRequest request, ClusterState state) {
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_WRITE);
}
@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, listener.map(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();
}
}
}