[
https://issues.apache.org/jira/browse/TEZ-3852?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Zhiyuan Yang closed TEZ-3852.
-----------------------------
> Optimize ContainerContext.isSuperSet to speed container reuse decisions
> -----------------------------------------------------------------------
>
> Key: TEZ-3852
> URL: https://issues.apache.org/jira/browse/TEZ-3852
> Project: Apache Tez
> Issue Type: Improvement
> Reporter: Jonathan Eagles
> Assignee: Jonathan Eagles
> Fix For: 0.9.1
>
> Attachments: TEZ-3852.001.patch, TEZ-3852.002.patch,
> TEZ-3852.003.patch
>
>
> Found an AM that was consuming high CPU. The stack trace below shows that
> container reuse compatibility check with a high number of local resources was
> the culprit.
> {noformat:title=task scheduler compatibility check}
> "DelayedContainerManager" #112 prio=5 os_prio=0 tid=0x0000000003b59800
> nid=0x1edba runnable [0x00007fe13c232000]
> java.lang.Thread.State: RUNNABLE
> at java.util.HashMap.putVal(HashMap.java:628)
> at java.util.HashMap.putMapEntries(HashMap.java:514)
> at java.util.HashMap.<init>(HashMap.java:489)
> at
> org.apache.tez.dag.app.ContainerContext.localResourcesCompatible(ContainerContext.java:132)
> at
> org.apache.tez.dag.app.ContainerContext.isSuperSet(ContainerContext.java:116)
> at
> org.apache.tez.dag.app.rm.container.ContainerContextMatcher.isSuperSet(ContainerContextMatcher.java:50)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService.canAssignTaskToContainer(YarnTaskSchedulerService.java:1543)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService.getMatchingRequestWithoutPriority(YarnTaskSchedulerService.java:1492)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService.access$500(YarnTaskSchedulerService.java:85)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService$NodeLocalContainerAssigner.assignReUsedContainer(YarnTaskSchedulerService.java:1870)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService.assignReUsedContainerWithLocation(YarnTaskSchedulerService.java:1754)
> - locked <0x00000006e0d12600> (a
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService.assignReUsedContainersWithLocation(YarnTaskSchedulerService.java:1712)
> - locked <0x00000006e0d12600> (a
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService.tryAssignReUsedContainers(YarnTaskSchedulerService.java:578)
> - locked <0x00000006e0d12600> (a
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService.access$800(YarnTaskSchedulerService.java:85)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService$DelayedContainerManager.doAssignAll(YarnTaskSchedulerService.java:2103)
> - locked <0x00000006e0d12600> (a
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService$DelayedContainerManager.mainLoop(YarnTaskSchedulerService.java:1984)
> at
> org.apache.tez.dag.app.rm.YarnTaskSchedulerService$DelayedContainerManager.run(YarnTaskSchedulerService.java:1974)
> {noformat}
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