Details
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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 3.0, 3.0.1, 3.0.2, 3.0.3, 3.1, 3.2, 3.3
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Fix Version/s: 3.4
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Component/s: core/index
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Labels:None
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Lucene Fields:New, Patch Available
Description
while backporting the testcase from LUCENE-3348 I ran into this thread hazard in the 3.x branch. We actually fixed this issue in LUCENE-3348 for Lucene 4.0 but since DWPT has a slightly different behavior when committing segments I create a new issue to track this down in 3.x. when we prepare a commit we sync on IW flush the DW and apply all deletes then release the lock, maybeMerge and start the commit (IW#startCommit(userdata)). Yet, a new segment could be flushed via getReader and sneak into the SegementInfos which are cloned in IW#startCommit instead of in prepareCommit right after the flush.
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fixed in 3.x
Nice catch Simon!
here is a patch that clones && commits the SIS while syncing on IW. All test pass including the TestStressNRT running2400 iterations