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[jira] [Created] (HBASE-20637) Polish the WAL switching when transiting from A to S


Duo Zhang created HBASE-20637:
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             Summary: Polish the WAL switching when transiting from A to S
                 Key: HBASE-20637
                 URL: https://issues.apache.org/jira/browse/HBASE-20637
             Project: HBase
          Issue Type: Sub-task
            Reporter: Duo Zhang


The design in HBASE-20424 implies that, when transiting from A to S, the RS will abort and the WAL file will be split.

But in fact, there could be races that make a RS still alive after the transiting which causes data inconsistency. And also, a full cluster restart is expensive, we need to find a more smooth way.



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