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https://issues.apache.org/jira/browse/YARN-4152?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14804967#comment-14804967
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Rohith Sharma K S commented on YARN-4152:
-----------------------------------------
Can you extract {{context.getContainers().get(containerId)}} to variable and
use the same later?
> NM crash with NPE when LogAggregationService#stopContainer called for absent
> container
> --------------------------------------------------------------------------------------
>
> Key: YARN-4152
> URL: https://issues.apache.org/jira/browse/YARN-4152
> Project: Hadoop YARN
> Issue Type: Bug
> Reporter: Bibin A Chundatt
> Assignee: Bibin A Chundatt
> Priority: Critical
> Attachments: 0001-YARN-4152.patch
>
>
> NM crash during of log aggregation.
> Ran Pi job with 500 container and killed application in between
> *Logs*
> {code}
> 2015-09-12 18:44:25,597 WARN
> org.apache.hadoop.yarn.server.nodemanager.DefaultContainerExecutor: Exit code
> from container container_e51_1442063466801_0001_01_000099 is : 143
> 2015-09-12 18:44:25,670 WARN
> org.apache.hadoop.yarn.server.nodemanager.containermanager.ContainerManagerImpl:
> Event EventType: KILL_CONTAINER sent to absent container
> container_e51_1442063466801_0001_01_000101
> 2015-09-12 18:44:25,670 INFO
> org.apache.hadoop.yarn.server.nodemanager.containermanager.application.ApplicationImpl:
> Removing container_e51_1442063466801_0001_01_000101 from application
> application_1442063466801_0001
> 2015-09-12 18:44:25,670 FATAL org.apache.hadoop.yarn.event.AsyncDispatcher:
> Error in dispatcher thread
> java.lang.NullPointerException
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.logaggregation.LogAggregationService.stopContainer(LogAggregationService.java:422)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.logaggregation.LogAggregationService.handle(LogAggregationService.java:456)
> at
> org.apache.hadoop.yarn.server.nodemanager.containermanager.logaggregation.LogAggregationService.handle(LogAggregationService.java:68)
> at
> org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:183)
> at
> org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:109)
> at java.lang.Thread.run(Thread.java:745)
> 2015-09-12 18:44:25,692 INFO
> org.apache.hadoop.yarn.server.nodemanager.containermanager.AuxServices: Got
> event CONTAINER_STOP for appId application_1442063466801_0001
> 2015-09-12 18:44:25,692 INFO org.apache.hadoop.yarn.event.AsyncDispatcher:
> Exiting, bbye..
> 2015-09-12 18:44:25,692 INFO
> org.apache.hadoop.yarn.server.nodemanager.NMAuditLogger: USER=dsperf
> OPERATION=Container Finished - Succeeded TARGET=ContainerImpl
> RESULT=SUCCESS APPID=application_1442063466801_0001
> CONTAINERID=container_e51_1442063466801_0001_01_000100
> {code}
> *Analysis*
> Looks like for absent container also {{stopContainer}} is called
> {code}
> case CONTAINER_FINISHED:
> LogHandlerContainerFinishedEvent containerFinishEvent =
> (LogHandlerContainerFinishedEvent) event;
> stopContainer(containerFinishEvent.getContainerId(),
> containerFinishEvent.getExitCode());
> break;
> {code}
> *Event EventType: KILL_CONTAINER sent to absent container
> container_e51_1442063466801_0001_01_000101*
> Should skip when {{null==context.getContainers().get(containerId)}}
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