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https://issues.apache.org/jira/browse/HBASE-15128?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Heng Chen updated HBASE-15128:
------------------------------
Resolution: Fixed
Fix Version/s: (was: 1.3.0)
1.4.0
Status: Resolved (was: Patch Available)
> Disable region splits and merges switch in master
> -------------------------------------------------
>
> Key: HBASE-15128
> URL: https://issues.apache.org/jira/browse/HBASE-15128
> Project: HBase
> Issue Type: Bug
> Reporter: Enis Soztutar
> Assignee: Heng Chen
> Fix For: 2.0.0, 1.4.0
>
> Attachments: HBASE-15128-branch-1.patch, HBASE-15128.patch,
> HBASE-15128_v1.patch, HBASE-15128_v3.patch, HBASE-15128_v5.patch,
> HBASE-15128_v6.patch, HBASE-15128_v7.patch, HBASE-15128_v8.patch,
> HBASE-15128_v9.patch
>
>
> 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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