Enis Soztutar created HBASE-15128:
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Summary: Disable region splits and merges in HBCK
Key: HBASE-15128
URL: https://issues.apache.org/jira/browse/HBASE-15128
Project: HBase
Issue Type: Bug
Reporter: Enis Soztutar
Fix For: 2.0.0, 1.3.0
In large clusters where region splits are frequent, and HBCK runs take longer,
the concurrent splits cause further problems in HBCK since HBCK assumes a
static state for the region partition map. We have just seen a case where HBCK
undo's a concurrently splitting region causing number of inconsistencies to go
up.
We can have a mode in master where splits and merges are disabled like the
balancer and catalog janitor switches. Master will reject the split requests if
regionservers decide to split. This switch can be turned on / off by the admins
and also automatically by HBCK while it is running (similar to balancer switch
being disabled by HBCK).
HBCK should also disable the Catalog Janitor just in case.
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