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https://issues.apache.org/jira/browse/HBASE-15075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15087909#comment-15087909
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Ted Yu edited comment on HBASE-15075 at 1/7/16 7:25 PM:
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Since the metadata goes through protobuf, the following type would be used in
SplitRegionRequest:
org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.UUID
was (Author: [email protected]):
Since the metadata goes through protobuf, the following seems better fit:
org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.UUID
> 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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