[jira] Commented: (LUCENE-2783) Deadlock in IndexWriter

["Michael McCandless (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/LUCENE-2783?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12964673#action_12964673 ] 

Michael McCandless commented on LUCENE-2783:
--------------------------------------------

This sounds like it may be a dup of LUCENE-2730?  Can you test the upcoming release candidate for 2.9.4 (http://s.apache.org/fL) and see if the deadlock is resolved?

If not, can you post the full thread dump?

> Deadlock in IndexWriter
> -----------------------
>
>                 Key: LUCENE-2783
>                 URL: https://issues.apache.org/jira/browse/LUCENE-2783
>             Project: Lucene - Java
>          Issue Type: Bug
>          Components: Index
>    Affects Versions: 2.9.3
>         Environment: ALL
>            Reporter: Christoph Goller
>             Fix For: 2.9.4
>
>   Original Estimate: 2h
>  Remaining Estimate: 2h
>
> If autoCommit == true a merge usually triggers a commit. A commit (prepareCommit) can trigger a merge vi the flush method. There is a synchronization mechanism for commit (commitLock) and a separate synchronization mechanism for merging (ConcurrentMergeScheduler.wait). If one thread holds the commitLock monitor and another one holds the ConcurrentMergeScheduler monitor we have a deadlock.

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