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https://issues.apache.org/jira/browse/YARN-184?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13499352#comment-13499352
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Alejandro Abdelnur commented on YARN-184:
-----------------------------------------
Sandy, looks good except for something I've missed in my previous review. In
the QueueManager,
{code}
public Collection<FSQueue> getQueues() {
synchronized (queues) {
return queues.values();
}
}
{code}
The returned collection should be a copy of queues.values() as the returned
collection is not threadsafe.
> Remove unnecessary locking in fair scheduler, and address findbugs excludes.
> ----------------------------------------------------------------------------
>
> Key: YARN-184
> URL: https://issues.apache.org/jira/browse/YARN-184
> Project: Hadoop YARN
> Issue Type: Improvement
> Affects Versions: 2.0.2-alpha
> Reporter: Sandy Ryza
> Assignee: Sandy Ryza
> Attachments: YARN-184-1.patch, YARN-184-2.patch, YARN-184.patch
>
>
> In YARN-12, locks were added to all fields of QueueManager to address
> findbugs. In addition, findbugs exclusions were added in response to
> MAPREDUCE-4439, without a deep look at the code.
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