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https://issues.apache.org/jira/browse/LUCENE-5374?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer updated LUCENE-5374:
------------------------------------

    Attachment: LUCENE-5374.patch

here is a patch - I beasted this for a long time without a failure and without 
I was able to reproduce is quickly with this in a loop though:
{noformat}
 ant test  -Dtestcase=TestIndexWriterWithThreads 
-Dtests.method=testRollbackAndCommitWithThreads -Dtests.seed=3FAF37E1AFFB2502 
-Dtests.slow=true -Dtests.locale=fr_FR -Dtests.timezone=Africa/Malabo 
-Dtests.file.encoding=UTF-8
{noformat}

> Call processEvents before IndexWriter is closed
> -----------------------------------------------
>
>                 Key: LUCENE-5374
>                 URL: https://issues.apache.org/jira/browse/LUCENE-5374
>             Project: Lucene - Core
>          Issue Type: Bug
>          Components: core/index
>    Affects Versions: 4.6
>            Reporter: Simon Willnauer
>            Assignee: Simon Willnauer
>             Fix For: 5.0, 4.7
>
>         Attachments: LUCENE-5374.patch
>
>
> We saw failures on jenkins that complain about processing events in the IW 
> while the IW is already closed:
> {noformat}
> com.carrotsearch.randomizedtesting.UncaughtExceptionError: Captured an 
> uncaught exception in thread: Thread[id=193, name=Thread-133, state=RUNNABLE, 
> group=TGRP-TestIndexWriterWithThreads]
> Caused by: java.lang.RuntimeException: 
> org.apache.lucene.store.AlreadyClosedException: this IndexWriter is closed
>         at __randomizedtesting.SeedInfo.seed([3FAF37E1AFFB2502]:0)
>         at 
> org.apache.lucene.index.TestIndexWriterWithThreads$1.run(TestIndexWriterWithThreads.java:619)
> Caused by: org.apache.lucene.store.AlreadyClosedException: this IndexWriter 
> is closed
>         at 
> org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:645)
>         at 
> org.apache.lucene.index.IndexWriter.numDeletedDocs(IndexWriter.java:622)
>         at 
> org.apache.lucene.index.IndexWriter.segString(IndexWriter.java:4265)
>         at 
> org.apache.lucene.index.IndexWriter.publishFlushedSegment(IndexWriter.java:2324)
>         at 
> org.apache.lucene.index.DocumentsWriterFlushQueue$FlushTicket.publishFlushedSegment(DocumentsWriterFlushQueue.java:198)
>         at 
> org.apache.lucene.index.DocumentsWriterFlushQueue$FlushTicket.finishFlush(DocumentsWriterFlushQueue.java:213)
>         at 
> org.apache.lucene.index.DocumentsWriterFlushQueue$SegmentFlushTicket.publish(DocumentsWriterFlushQueue.java:249)
>         at 
> org.apache.lucene.index.DocumentsWriterFlushQueue.innerPurge(DocumentsWriterFlushQueue.java:116)
>         at 
> org.apache.lucene.index.DocumentsWriterFlushQueue.forcePurge(DocumentsWriterFlushQueue.java:138)
>         at 
> org.apache.lucene.index.DocumentsWriter.purgeBuffer(DocumentsWriter.java:185)
>         at org.apache.lucene.index.IndexWriter.purge(IndexWriter.java:4634)
>         at 
> org.apache.lucene.index.DocumentsWriter$ForcedPurgeEvent.process(DocumentsWriter.java:701)
>         at 
> org.apache.lucene.index.IndexWriter.processEvents(IndexWriter.java:4665)
>         at 
> org.apache.lucene.index.IndexWriter.processEvents(IndexWriter.java:4657)
>         at 
> org.apache.lucene.index.IndexWriter.closeInternal(IndexWriter.java:1067)
>         at 
> org.apache.lucene.index.IndexWriter.rollbackInternal(IndexWriter.java:2106)
>         at org.apache.lucene.index.IndexWriter.rollback(IndexWriter.java:2024)
>         at 
> org.apache.lucene.index.TestIndexWriterWithThreads$1.run(TestIndexWriterWithThreads.java:575)
> {noformat}
> we need to process the events before we enter the finally block in 
> IW#closeInternal



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