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Posted to issues@solr.apache.org by "Mike Drob (Jira)" <ji...@apache.org> on 2022/03/30 17:56:00 UTC

[jira] [Commented] (SOLR-16127) OrderedExecutor can orphan permits and leak locks

    [ https://issues.apache.org/jira/browse/SOLR-16127?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17514868#comment-17514868 ] 

Mike Drob commented on SOLR-16127:
----------------------------------

cc: [~caomanhdat] what was the original intent of the design here? I have a PR up to demonstrate the problem, I'm not sure if we can ever get into a situation where a waiting thread is interrupted without the rest of the server going down anyway, but I also don't like to hope that a situation is impossible to avoid potential bugs.

> OrderedExecutor can orphan permits and leak locks
> -------------------------------------------------
>
>                 Key: SOLR-16127
>                 URL: https://issues.apache.org/jira/browse/SOLR-16127
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Mike Drob
>            Priority: Major
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> If a thread is interrupted while waiting to acquire a maxThreads semaphore permit, then it does not clean up the corresponding entry in striped lock, which may prevent future threads from executing even when enough semaphore permits become available.



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