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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.configuration;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.elasticsearch.ElasticsearchException;
import org.elasticsearch.ElasticsearchTimeoutException;
import org.elasticsearch.action.ActionListener;
import org.elasticsearch.action.ActionResponse;
import org.elasticsearch.action.support.ActionFilters;
import org.elasticsearch.action.support.master.TransportMasterNodeAction;
import org.elasticsearch.cluster.ClusterState;
import org.elasticsearch.cluster.ClusterStateObserver;
import org.elasticsearch.cluster.ClusterStateObserver.Listener;
import org.elasticsearch.cluster.ClusterStateUpdateTask;
import org.elasticsearch.cluster.block.ClusterBlockException;
import org.elasticsearch.cluster.block.ClusterBlockLevel;
import org.elasticsearch.cluster.coordination.CoordinationMetadata;
import org.elasticsearch.cluster.coordination.CoordinationMetadata.VotingConfigExclusion;
import org.elasticsearch.cluster.metadata.IndexNameExpressionResolver;
import org.elasticsearch.cluster.metadata.Metadata;
import org.elasticsearch.cluster.service.ClusterService;
import org.elasticsearch.common.Priority;
import org.elasticsearch.common.inject.Inject;
import org.elasticsearch.core.TimeValue;
import org.elasticsearch.threadpool.ThreadPool;
import org.elasticsearch.transport.TransportService;
import java.util.function.Predicate;
public class TransportClearVotingConfigExclusionsAction extends TransportMasterNodeAction<
ClearVotingConfigExclusionsRequest,
ActionResponse.Empty> {
private static final Logger logger = LogManager.getLogger(TransportClearVotingConfigExclusionsAction.class);
@Inject
public TransportClearVotingConfigExclusionsAction(
TransportService transportService,
ClusterService clusterService,
ThreadPool threadPool,
ActionFilters actionFilters,
IndexNameExpressionResolver indexNameExpressionResolver
) {
super(
ClearVotingConfigExclusionsAction.NAME,
false,
transportService,
clusterService,
threadPool,
actionFilters,
ClearVotingConfigExclusionsRequest::new,
indexNameExpressionResolver,
in -> ActionResponse.Empty.INSTANCE,
ThreadPool.Names.SAME
);
}
@Override
protected void masterOperation(
ClearVotingConfigExclusionsRequest request,
ClusterState initialState,
ActionListener listener
) throws Exception {
final long startTimeMillis = threadPool.relativeTimeInMillis();
final Predicate allExclusionsRemoved = newState -> {
for (VotingConfigExclusion tombstone : initialState.getVotingConfigExclusions()) {
// NB checking for the existence of any node with this persistent ID, because persistent IDs are how votes are counted.
if (newState.nodes().nodeExists(tombstone.getNodeId())) {
return false;
}
}
return true;
};
if (request.getWaitForRemoval() && allExclusionsRemoved.test(initialState) == false) {
final ClusterStateObserver clusterStateObserver = new ClusterStateObserver(
initialState,
clusterService,
request.getTimeout(),
logger,
threadPool.getThreadContext()
);
clusterStateObserver.waitForNextChange(new Listener() {
@Override
public void onNewClusterState(ClusterState state) {
submitClearVotingConfigExclusionsTask(request, startTimeMillis, listener);
}
@Override
public void onClusterServiceClose() {
listener.onFailure(
new ElasticsearchException(
"cluster service closed while waiting for removal of nodes " + initialState.getVotingConfigExclusions()
)
);
}
@Override
public void onTimeout(TimeValue timeout) {
listener.onFailure(
new ElasticsearchTimeoutException(
"timed out waiting for removal of nodes; if nodes should not be removed, set ?wait_for_removal=false. "
+ initialState.getVotingConfigExclusions()
)
);
}
}, allExclusionsRemoved);
} else {
submitClearVotingConfigExclusionsTask(request, startTimeMillis, listener);
}
}
private void submitClearVotingConfigExclusionsTask(
ClearVotingConfigExclusionsRequest request,
long startTimeMillis,
ActionListener listener
) {
clusterService.submitStateUpdateTask(
"clear-voting-config-exclusions",
new ClusterStateUpdateTask(
Priority.URGENT,
TimeValue.timeValueMillis(Math.max(0, request.getTimeout().millis() + startTimeMillis - threadPool.relativeTimeInMillis()))
) {
@Override
public ClusterState execute(ClusterState currentState) {
final CoordinationMetadata newCoordinationMetadata = CoordinationMetadata.builder(currentState.coordinationMetadata())
.clearVotingConfigExclusions()
.build();
final Metadata newMetadata = Metadata.builder(currentState.metadata())
.coordinationMetadata(newCoordinationMetadata)
.build();
return ClusterState.builder(currentState).metadata(newMetadata).build();
}
@Override
public void onFailure(String source, Exception e) {
listener.onFailure(e);
}
@Override
public void clusterStateProcessed(String source, ClusterState oldState, ClusterState newState) {
listener.onResponse(ActionResponse.Empty.INSTANCE);
}
}
);
}
@Override
protected ClusterBlockException checkBlock(ClearVotingConfigExclusionsRequest request, ClusterState state) {
return state.blocks().globalBlockedException(ClusterBlockLevel.METADATA_WRITE);
}
}