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Posted to issues@ratis.apache.org by "runzhiwang (Jira)" <ji...@apache.org> on 2020/04/06 05:52:00 UTC

[jira] [Created] (RATIS-839) Memory leak of LogAppender

runzhiwang created RATIS-839:
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             Summary: Memory leak of LogAppender
                 Key: RATIS-839
                 URL: https://issues.apache.org/jira/browse/RATIS-839
             Project: Ratis
          Issue Type: Bug
            Reporter: runzhiwang
         Attachments: image-2020-04-06-13-48-10-703.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 GprcLogAppender.

!image-2020-04-06-13-48-10-703.png!

 

*What's the reason ?*

From the code, when [removeSender|[https://github.com/apache/incubator-ratis/blob/master/ratis-server/src/main/java/org/apache/ratis/server/impl/LeaderState.java#L431]], it did not call LogAppender::stopAppender.

 

*How to fix ?*

To avoid ** forgetting stopAppender,  I stopAppender in removeAll.

 



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