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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