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https://issues.apache.org/jira/browse/RATIS-839?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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runzhiwang updated RATIS-839:
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Description:
*What's the problem ?*
When run hadoop-ozone for 4 days, datanode memory leak. When dump heap, I
found there are 460710 instances of GrpcLogAppender. But there are only 6
instances of SenderList, and each SenderList contains 1-2 instance of
GrpcLogAppender. So there are a lot of GrpcLogAppender did not stop the Daemon
Thread when removed from senders.
!image-2020-04-06-13-48-10-703.png!*!image-2020-04-06-13-59-14-146.png!*
was:
*What's the problem ?*
When run hadoop-ozone for 4 days, datanode memory leak. When dump heap, I
found there are 460710 instances of GrpcLogAppender. But there are only 6
instances of SenderList, and each SenderList contains 1-2 instance of
GrpcLogAppender. So there are a lot of GrpcLogAppender did not stop the Daemon
Thread when removed from senders.
!image-2020-04-06-13-48-10-703.png!*!image-2020-04-06-13-59-14-146.png!*
*What's the reason ?*
>From the code, when [removeSender, |#L431]]it did not call
>LogAppender::stopAppender.
*How to fix ?*
To avoid forgetting stopAppender, I stopAppender in removeAll.
> Memory leak of LogAppender
> --------------------------
>
> Key: RATIS-839
> URL: https://issues.apache.org/jira/browse/RATIS-839
> Project: Ratis
> Issue Type: Bug
> Reporter: runzhiwang
> Priority: Major
> Attachments: RATIS-839.001.patch, image-2020-04-06-13-48-10-703.png,
> image-2020-04-06-13-58-24-681.png, image-2020-04-06-13-59-14-146.png
>
>
> *What's the problem ?*
> When run hadoop-ozone for 4 days, datanode memory leak. When dump heap, I
> found there are 460710 instances of GrpcLogAppender. But there are only 6
> instances of SenderList, and each SenderList contains 1-2 instance of
> GrpcLogAppender. So there are a lot of GrpcLogAppender did not stop the
> Daemon Thread when removed from senders.
> !image-2020-04-06-13-48-10-703.png!*!image-2020-04-06-13-59-14-146.png!*
>
>
>
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