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Posted to yarn-dev@hadoop.apache.org by "Tsuyoshi OZAWA (JIRA)" <ji...@apache.org> on 2014/07/17 19:35:05 UTC
[jira] [Created] (YARN-2313) Livelock can occur on FairScheduler
when there are lots entry in queue
Tsuyoshi OZAWA created YARN-2313:
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Summary: Livelock can occur on FairScheduler when there are lots entry in queue
Key: YARN-2313
URL: https://issues.apache.org/jira/browse/YARN-2313
Project: Hadoop YARN
Issue Type: Bug
Components: fairscheduler
Affects Versions: 2.4.1
Reporter: Tsuyoshi OZAWA
Assignee: Tsuyoshi OZAWA
Observed livelock on FairScheduler when there are lots entry in queue. After my investigating code, following case can occur:
1. {{update()}} called by UpdateThread takes longer times than UPDATE_INTERVAL(500ms) if there are lots queue.
2. UpdateThread goes busy loop.
3. Other threads(AllocationFileReloader, ResourceManager$SchedulerEventDispatcher) can wait forever.
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