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https://issues.apache.org/jira/browse/STORM-2027?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15412626#comment-15412626
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Giovanni Matteo Fumarola commented on STORM-2027:
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[~miguno], I am using your code to create a sliding window check to prevent DoS
attack in [YARN-1547|https://issues.apache.org/jira/browse/YARN-1547].
During the implementation of it, [~yochen] found the bug and he created a UTC
to verify the issue - the attached file.
> Possible Race Condition issue in SlidingWindow
> ----------------------------------------------
>
> Key: STORM-2027
> URL: https://issues.apache.org/jira/browse/STORM-2027
> Project: Apache Storm
> Issue Type: Bug
> Reporter: Giovanni Matteo Fumarola
> Priority: Minor
> Attachments: TestSlotBasedCounter.java
>
>
> The function SlotBasedCounter#incrementCount() presents a bug. If 2
> concurrent threads want to update the same counter, the result is different
> from the expected.
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