[jira] [Assigned] (HBASE-15075) Allow region split request to carry metadata

["Ted Yu (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-15075?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ted Yu reassigned HBASE-15075:
------------------------------

    Assignee: Ted Yu

> 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
>            Assignee: Ted Yu
>         Attachments: 15075-v0.txt, 15075-v1.txt
>
>
> 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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