Michael McCandless created LUCENE-5006:
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Summary: 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
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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