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https://issues.apache.org/jira/browse/CURATOR-654?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17613316#comment-17613316
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Stuart Scott commented on CURATOR-654:
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Hi Zili,
I have added tests and created a pull request.
https://github.com/apache/curator/pull/435
Stuart.
> DistributedBarrier watcher leak
> -------------------------------
>
> Key: CURATOR-654
> URL: https://issues.apache.org/jira/browse/CURATOR-654
> Project: Apache Curator
> Issue Type: Bug
> Components: Recipes
> Affects Versions: 5.3.0
> Reporter: Stuart Scott
> Priority: Major
> Attachments:
> CURATOR-654__Remove_watchers_after_waiting_for_barrier_.patch
>
>
> The DistributedBarrier adds a zookeeper exists watcher in the waitOnBarrier()
> method. It appears as though the watcher is never removed. In a system where
> DistributedBarriers are used heavily this eventually results in the system
> running out of memory.
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