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https://issues.apache.org/jira/browse/HBASE-12035?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14309293#comment-14309293
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Andrey Stepachev commented on HBASE-12035:
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checked errors, seems there unstable test from HBASE-11574
{code}
ERROR: META region or some of its attributes are null.
ERROR: hbase:meta, replicaId 2 is not found on any region.
ERROR: hbase:meta table is not consistent. Run HBCK with proper fix options to
fix hbase:meta inconsistency. Exiting...
{code}
the second test should be fixed with last NPE patch in EnableTableHandler.
retry submission.
> Client does an RPC to master everytime a region is relocated
> ------------------------------------------------------------
>
> Key: HBASE-12035
> URL: https://issues.apache.org/jira/browse/HBASE-12035
> Project: HBase
> Issue Type: Improvement
> Components: Client, master
> Affects Versions: 2.0.0
> Reporter: Enis Soztutar
> Assignee: Andrey Stepachev
> Priority: Critical
> Fix For: 2.0.0
>
> Attachments: 12035v2.txt, HBASE-12035 (1) (1).patch, HBASE-12035 (1)
> (1).patch, HBASE-12035 (1).patch, HBASE-12035.patch, HBASE-12035.patch,
> HBASE-12035.patch, HBASE-12035.patch, HBASE-12035.patch, HBASE-12035.patch,
> HBASE-12035.patch, HBASE-12035.patch, HBASE-12035.patch, HBASE-12035.patch
>
>
> HBASE-7767 moved table enabled|disabled state to be kept in hdfs instead of
> zookeeper. isTableDisabled() which is used in
> HConnectionImplementation.relocateRegion() now became a master RPC call
> rather than a zookeeper client call. Since we do relocateRegion() calls
> everytime we want to relocate a region (region moved, RS down, etc) this
> implies that when the master is down, the some of the clients for uncached
> regions will be affected.
> See HBASE-7767 and HBASE-11974 for some more background.
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