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https://issues.apache.org/jira/browse/MAPREDUCE-7058?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
BELUGA BEHR resolved MAPREDUCE-7058.
------------------------------------
Resolution: Duplicate
> Race Condition When Stopping DelegationTokenRenewer
> ---------------------------------------------------
>
> Key: MAPREDUCE-7058
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-7058
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Components: mrv2
> Affects Versions: 3.0.0
> Reporter: BELUGA BEHR
> Priority: Major
>
> [https://github.com/apache/hadoop/blob/69fa81679f59378fd19a2c65db8019393d7c05a2/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/DelegationTokenRenewer.java]
> {code:java}
> private ThreadPoolExecutor renewerService;
> private void processDelegationTokenRenewerEvent(
> DelegationTokenRenewerEvent evt) {
> serviceStateLock.readLock().lock();
> try {
> if (isServiceStarted) {
> renewerService.execute(new DelegationTokenRenewerRunnable(evt));
> } else {
> pendingEventQueue.add(evt);
> }
> } finally {
> serviceStateLock.readLock().unlock();
> }
> }
> @Override
> protected void serviceStop() {
> if (renewalTimer != null) {
> renewalTimer.cancel();
> }
> appTokens.clear();
> allTokens.clear();
> this.renewerService.shutdown();
> {code}
> {code:java}
> 2018-02-21 11:18:16,253 FATAL org.apache.hadoop.yarn.event.AsyncDispatcher:
> Error in dispatcher thread
> java.util.concurrent.RejectedExecutionException: Task
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer$DelegationTokenRenewerRunnable@39bddaf2
> rejected from java.util.concurrent.ThreadPoolExecutor@5f71637b[Terminated,
> pool size = 0, active threads = 0, queued tasks = 0, completed tasks = 15487]
> at
> java.util.concurrent.ThreadPoolExecutor$AbortPolicy.rejectedExecution(ThreadPoolExecutor.java:2048)
> at
> java.util.concurrent.ThreadPoolExecutor.reject(ThreadPoolExecutor.java:821)
> at
> java.util.concurrent.ThreadPoolExecutor.execute(ThreadPoolExecutor.java:1372)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer.processDelegationTokenRenewerEvent(DelegationTokenRenewer.java:196)
> at
> org.apache.hadoop.yarn.server.resourcemanager.security.DelegationTokenRenewer.applicationFinished(DelegationTokenRenewer.java:734)
> at
> org.apache.hadoop.yarn.server.resourcemanager.RMAppManager.finishApplication(RMAppManager.java:199)
> at
> org.apache.hadoop.yarn.server.resourcemanager.RMAppManager.handle(RMAppManager.java:424)
> at
> org.apache.hadoop.yarn.server.resourcemanager.RMAppManager.handle(RMAppManager.java:65)
> at
> org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:177)
> at
> org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:109)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> What I think is going on here is that the {{serviceStop}} method is not
> setting the {{isServiceStarted}} flag to 'false'.
> Please update so that the {{serviceStop}} method grabs the
> {{serviceStateLock}} and sets {{isServiceStarted}} to _false_, before
> shutting down the {{renewerService}} thread pool, to avoid this condition.
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