Ted Yu created HBASE-15075:
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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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