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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-15075) Allow region split request to carry metadata
Date Wed, 06 Jan 2016 22:19:39 GMT
Ted Yu created HBASE-15075:
------------------------------

             Summary: Allow region split request to carry metadata
                 Key: HBASE-15075
                 URL: https://issues.apache.org/jira/browse/HBASE-15075
             Project: HBase
          Issue Type: Improvement
            Reporter: Ted Yu


During the process of improving region normalization feature, I found that if region split
request triggered by the execution of SplitNormalizationPlan fails, there is no way of knowing
whether the failed split originated from region normalization.

The association of particular split request with outcome of split would give RegionNormalizer
information so that it can make better normalization decisions in the subsequent invocations.

One approach is to embed metadata in SplitRequest which gets passed through RegionStateTransitionContext
when RegionServerServices#reportRegionStateTransition() is called.
This way, RegionStateListener can be notified with the metadata (id of the requester).

See discussion on dev mailing list
http://search-hadoop.com/m/YGbbCXdkivihp2



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