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From "Vincent Poon (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-4214) Scans which write should not block region split or close
Date Fri, 15 Sep 2017 00:11:00 GMT
Vincent Poon created PHOENIX-4214:
-------------------------------------

             Summary: Scans which write should not block region split or close
                 Key: PHOENIX-4214
                 URL: https://issues.apache.org/jira/browse/PHOENIX-4214
             Project: Phoenix
          Issue Type: Bug
    Affects Versions: 4.12.0
            Reporter: Vincent Poon


PHOENIX-3111 introduced a scan reference counter which is checked during region preSplit and
preClose.  However, a steady stream of UPSERT SELECT or DELETE can keep the count above 0
indefinitely, preventing or greatly delaying a region split or close.

We should try to avoid starvation of the split / close request, and fail/reject queries where
appropriate.



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