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From "Yonik Seeley (JIRA)" <>
Subject [jira] [Commented] (SOLR-7836) Possible deadlock when closing refcounted index writers.
Date Fri, 14 Aug 2015 21:21:46 GMT


Yonik Seeley commented on SOLR-7836:

bq. There is not a third thread that has the Writer out?

I just checked again... didn't see another.

bq. Both of those traces line up with another thread having the writer. I don't spend why
they would deadlock each other without another thread involved.

The first thread has the writer?  I have never really reviewed SolrCoreState in depth though...
so I'm still not really sure.

> Possible deadlock when closing refcounted index writers.
> --------------------------------------------------------
>                 Key: SOLR-7836
>                 URL:
>             Project: Solr
>          Issue Type: Bug
>            Reporter: Erick Erickson
>            Assignee: Erick Erickson
>             Fix For: Trunk, 5.4
>         Attachments: SOLR-7836-synch.patch, SOLR-7836.patch, SOLR-7836.patch, SOLR-7836.patch,,, deadlock_test
> Preliminary patch for what looks like a possible race condition between writerFree and
pauseWriter in DefaultSorlCoreState.
> Looking for comments and/or why I'm completely missing the boat.

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