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Posted to issues@ratis.apache.org by "yuuka (Jira)" <ji...@apache.org> on 2024/09/24 02:28:00 UTC

[jira] [Commented] (RATIS-2161) Grpc may spawn many threads

    [ https://issues.apache.org/jira/browse/RATIS-2161?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17884082#comment-17884082 ] 

yuuka commented on RATIS-2161:
------------------------------

In our test, the server was directly stopped, for example, kill -9

> Grpc may spawn many threads
> ---------------------------
>
>                 Key: RATIS-2161
>                 URL: https://issues.apache.org/jira/browse/RATIS-2161
>             Project: Ratis
>          Issue Type: Wish
>          Components: gRPC
>            Reporter: yuuka
>            Priority: Major
>         Attachments: image-2024-09-23-10-18-27-800.png, image-2024-09-23-10-23-55-154.png, image-2024-09-23-10-28-52-065.png
>
>
> Under high load, if there are many RaftGroup leaders on one machine and there is a sudden crash, grpc may create many threads to handle requestVote and appendEntry, etc.N, frequent thread creation and context switching, which may lead to performance degradation.
>  
> !image-2024-09-23-10-18-27-800.png!
>  
> !image-2024-09-23-10-23-55-154.png!
> !image-2024-09-23-10-28-52-065.png!
> It seems that grpc will not release the thread yet.
> We can specify a fixed number of thread pools or periodically recycle threads



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