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From "Christoph Goller (JIRA)" <j...@apache.org>
Subject [jira] Created: (LUCENE-2783) Deadlock in IndexWriter
Date Mon, 29 Nov 2010 09:19:37 GMT
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


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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