org.apache.flink.runtime.executiongraph.failover.RestartAllStrategy Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* 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,
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* See the License for the specific language governing permissions and
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*/
package org.apache.flink.runtime.executiongraph.failover;
import org.apache.flink.runtime.executiongraph.Execution;
import org.apache.flink.runtime.executiongraph.ExecutionGraph;
import org.apache.flink.runtime.executiongraph.ExecutionJobVertex;
import java.util.List;
import static org.apache.flink.util.Preconditions.checkNotNull;
/**
* Simple failover strategy that triggers a restart of all tasks in the
* execution graph, via {@link ExecutionGraph#failGlobal(Throwable)}.
*/
public class RestartAllStrategy extends FailoverStrategy {
/** The execution graph to recover */
private final ExecutionGraph executionGraph;
/**
* Creates a new failover strategy that recovers from failures by restarting all tasks
* of the execution graph.
*
* @param executionGraph The execution graph to handle.
*/
public RestartAllStrategy(ExecutionGraph executionGraph) {
this.executionGraph = checkNotNull(executionGraph);
}
// ------------------------------------------------------------------------
@Override
public void onTaskFailure(Execution taskExecution, Throwable cause) {
// this strategy makes every task failure a global failure
executionGraph.failGlobal(cause);
}
@Override
public void notifyNewVertices(List newJobVerticesTopological) {
// nothing to do
}
@Override
public String getStrategyName() {
return "full graph restart";
}
// ------------------------------------------------------------------------
// factory
// ------------------------------------------------------------------------
/**
* Factory that instantiates the RestartAllStrategy.
*/
public static class Factory implements FailoverStrategy.Factory {
@Override
public FailoverStrategy create(ExecutionGraph executionGraph) {
return new RestartAllStrategy(executionGraph);
}
}
}