org.apache.hadoop.hive.ql.reexec.ReExecutionDagSubmitPlugin Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one
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* distributed with this work for additional information
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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
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* See the License for the specific language governing permissions and
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*/
package org.apache.hadoop.hive.ql.reexec;
import org.apache.hadoop.hive.ql.Driver;
import org.apache.hadoop.hive.ql.hooks.ExecuteWithHookContext;
import org.apache.hadoop.hive.ql.hooks.HookContext;
import org.apache.hadoop.hive.ql.hooks.HookContext.HookType;
import org.apache.hadoop.hive.ql.plan.mapper.PlanMapper;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* Re-Executes a query when DAG submission fails after get session returned successfully. There could be race condition
* where getSession could return a healthy AM but by the time DAG is submitted the AM could become unhealthy/unreachable
* (possible DNS or network issues) which can fail tez DAG submission. Since the DAG hasn't started execution yet this
* failure can be safely restarted/retried.
*/
public class ReExecutionDagSubmitPlugin implements IReExecutionPlugin {
private static final Logger LOG = LoggerFactory.getLogger(ReExecutionDagSubmitPlugin.class);
class LocalHook implements ExecuteWithHookContext {
@Override
public void run(HookContext hookContext) throws Exception {
if (hookContext.getHookType() == HookType.ON_FAILURE_HOOK) {
Throwable exception = hookContext.getException();
if (exception != null && exception.getMessage() != null) {
if (exception.getMessage().contains("Dag submit failed")) {
retryPossible = true;
}
LOG.info("Got exception message: {} retryPossible: {}", exception.getMessage(), retryPossible);
}
}
}
}
@Override
public void initialize(Driver driver) {
driver.getHookRunner().addOnFailureHook(new LocalHook());
}
private boolean retryPossible;
@Override
public boolean shouldReExecuteAfterCompile(int executionNum, PlanMapper pm1, PlanMapper pm2) {
return retryPossible;
}
@Override
public boolean shouldReExecute(int executionNum) {
return retryPossible;
}
}