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https://issues.apache.org/jira/browse/LUCENE-5407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13878593#comment-13878593
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Luis Filipe Nassif commented on LUCENE-5407:
--------------------------------------------
Thank you for comment. Although there are less than 8 threads in example, I
agree the general case will not work.
> Deadlock? while indexing in cascaded threads
> --------------------------------------------
>
> Key: LUCENE-5407
> URL: https://issues.apache.org/jira/browse/LUCENE-5407
> Project: Lucene - Core
> Issue Type: Bug
> Components: core/index
> Affects Versions: 4.6
> Environment: Windows 7 64 bits, JRE 1.7.0_25 64 bits
> Reporter: Luis Filipe Nassif
> Assignee: Simon Willnauer
> Attachments: Test.java, thread_dump.txt
>
>
> Apparently I found a deadlock problem with IndexWriter in a cascaded thread
> design to add documents (I am working on an application integrating Tika,
> which has the capability to add embedded documents to the index as
> independent documents as they are found). The attached code illustrates the
> problem. Sometimes it stops processing, at least one of the threads remains
> in WAITING state. It must be executed no more than 5 times in my environment
> to trigger the problem.
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