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https://issues.apache.org/jira/browse/MAPREDUCE-4452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13419200#comment-13419200
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Junping Du commented on MAPREDUCE-4452:
---------------------------------------
The left two warning in Findbugs is not a issue as get/set primitive is atomic
if the size of the variable is less that or equal to 32 bits. Here, both
userMaxAppsDefault and queueMaxAppsDefault are int type so accessing them can
still keep atomic.
> Several Findbugs issues with new FairScheduler in YARN
> ------------------------------------------------------
>
> Key: MAPREDUCE-4452
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-4452
> Project: Hadoop Map/Reduce
> 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.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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