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https://issues.apache.org/jira/browse/STORM-244?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14020010#comment-14020010
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ASF GitHub Bot commented on STORM-244:
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Github user revans2 commented on the pull request:
https://github.com/apache/incubator-storm/pull/132#issuecomment-45357623
+1 looks good.
> DRPC timeout can return null instead of throwing an exception
> -------------------------------------------------------------
>
> Key: STORM-244
> URL: https://issues.apache.org/jira/browse/STORM-244
> Project: Apache Storm (Incubating)
> Issue Type: Bug
> Reporter: Robert Joseph Evans
>
> In DPRC there is a race condition when the cleanup method is called between
> releasing the sem, cleaning up the atoms and the blocked thread fetching the
> result. It looks like it is possible on a timeout that the sem will be
> released but by the time the thread blocked on the sem actually wakes up the
> result may have been removed, causing a null to be returned instead of an
> exception being thrown.
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