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From "Patrick Wendell (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-12) Several Findbugs issues with new FairScheduler in YARN
Date Wed, 08 Aug 2012 16:47:20 GMT

    [ https://issues.apache.org/jira/browse/YARN-12?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13431213#comment-13431213

Patrick Wendell commented on YARN-12:

Hey Junping, 

Thanks for the contribution, it looks good to me. I find the excess locking a bit pedantic,
but if it's necessary to get FindBugs to shut-up, so be it!
> Several Findbugs issues with new FairScheduler in YARN
> ------------------------------------------------------
>                 Key: YARN-12
>                 URL: https://issues.apache.org/jira/browse/YARN-12
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: scheduler
>    Affects Versions: 2.1.0-alpha
>            Reporter: Junping Du
>            Assignee: Junping Du
>         Attachments: MAPREDUCE-4452-v1.patch, MAPREDUCE-4452-v2.patch, MAPREDUCE-4452-v3.patch,
MAPREDUCE-4452.patch, YARN-12.patch
> The good feature of FairScheduler is added recently to YARN. As recently PreCommit test
from MAPREDUCE-4309, there are several bugs found by Findbugs related to FairScheduler:
> org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairSchedulerEventLog.shutdown()
might ignore java.lang.Exception
> Inconsistent synchronization of org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.FairSchedulerEventLog.logDisabled;
locked 50% of time
> Inconsistent synchronization of org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.QueueManager.queueMaxAppsDefault;
locked 50% of time
> Inconsistent synchronization of org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.QueueManager.userMaxAppsDefault;
locked 50% of time
> The details are in:https://builds.apache.org/job/PreCommit-MAPREDUCE-Build/2612//artifact/trunk/patchprocess/newPatchFindbugsWarningshadoop-yarn-server-resourcemanager.html#DE_MIGHT_IGNORE

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