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Posted to dev@lucene.apache.org by "Michael McCandless (JIRA)" <ji...@apache.org> on 2013/01/04 15:22:13 UTC

[jira] [Created] (LUCENE-4660) When ConcurrentMergeScheduler stalls incoming threads it has unexpected hysteresis

Michael McCandless created LUCENE-4660:
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             Summary: When ConcurrentMergeScheduler stalls incoming threads it has unexpected hysteresis
                 Key: LUCENE-4660
                 URL: https://issues.apache.org/jira/browse/LUCENE-4660
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Michael McCandless


Eg if you set maxMergeCount to 2, as soon as a 3rd merge need to kick off, we stall incoming segment-creating threads.  Then we wait ... and we are supposed to resume the threads when the merge count drops back to 2, but instead we are only resuming when merge count gets to 1.  Ie, we stall for too long (= unexpected hysteresis).

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