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https://issues.apache.org/jira/browse/LUCENE-5006?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Simon Willnauer reassigned LUCENE-5006:
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Assignee: Simon Willnauer
> Simplify / understand IndexWriter/DocumentsWriter synchronization
> -----------------------------------------------------------------
>
> Key: LUCENE-5006
> URL: https://issues.apache.org/jira/browse/LUCENE-5006
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Michael McCandless
> Assignee: Simon Willnauer
>
> The concurrency in IW/DW/BD is terrifying: there are many locks involved, not
> just intrinsic locks but IW also has fullFlushLock, commitLock, and there are
> no clear rules about lock order to avoid deadlocks like LUCENE-5002.
> We have to somehow simplify this, and define the allowed concurrent behavior
> eg when an app calls deleteAll while other threads are indexing.
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