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https://issues.apache.org/jira/browse/LUCENE-1555?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12680873#action_12680873
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Stefan Heidrich commented on LUCENE-1555:
-----------------------------------------
I've changed only IndexWriter.close() to IndexWriter.close(true). The true is
correct.
After some testing we couldn't reproduce the lock anymore. So I think it is
solved with this change.
I've expected, that calling ConcurrentMergeScheduler.sync() would prevents the
lock, but that was not the case.
I'm not doing any external synchronization on IndexWriter myself. I expect that
the IndexWriter is synchronized by itself.
The indexer thread is the only thread that uses the IndexWriter and calling
IndexWriter.close().
Sure there are many threads running, but these are the only two threads, that
have to do with the indexing.
> Deadlock while optimize
> -----------------------
>
> Key: LUCENE-1555
> URL: https://issues.apache.org/jira/browse/LUCENE-1555
> Project: Lucene - Java
> Issue Type: Bug
> Components: Index
> Affects Versions: 2.4
> Environment: ubuntu 8.04, java 1.6 update 07, Lucene 2.4.0
> Reporter: Stefan Heidrich
> Assignee: Michael McCandless
>
> Sometimes after starting the thread with the indexer, the thread will hang in
> the following threads.
> Thread [Lucene Merge Thread #0] (Ausgesetzt)
> IndexWriter.commitMerge(MergePolicy$OneMerge, SegmentMerger, int) Line:
> 3751
> IndexWriter.mergeMiddle(MergePolicy$OneMerge) Line: 4240
> IndexWriter.merge(MergePolicy$OneMerge) Line: 3877
> ConcurrentMergeScheduler.doMerge(MergePolicy$OneMerge) Line: 205
> ConcurrentMergeScheduler$MergeThread.run() Line: 260
> Thread [Indexer] (Ausgesetzt)
> Object.wait(long) Line: not available [native Methode]
> IndexWriter.doWait() Line: 4491
> IndexWriter.optimize(int, boolean) Line: 2268
> IndexWriter.optimize(boolean) Line: 2203
> IndexWriter.optimize() Line: 2183
> Indexer.run() Line: 263
> If you need more informations, please let me know.
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