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https://issues.apache.org/jira/browse/IMPALA-8403?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16825758#comment-16825758
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Quanlong Huang commented on IMPALA-8403:
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Most of the threads have the name as "backend-xxx"
> Possible thread leak in impalad
> -------------------------------
>
> Key: IMPALA-8403
> URL: https://issues.apache.org/jira/browse/IMPALA-8403
> Project: IMPALA
> Issue Type: Bug
> Affects Versions: Impala 2.12.0
> Reporter: Quanlong Huang
> Priority: Major
> Attachments: image-2019-04-10-11-15-11-321.png
>
>
> The metric of thread-manager.running-threads got from
> http://${impalad_host}:25000/metrics?json shows that the number of running
> threads keeps increasing. (See the snapshot) This phenomenon is most
> noticeable in coordinators.
> Maybe a counter bug or threads leak.
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