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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-15075) Allow region split request to carry identification information
Date Sat, 16 Jan 2016 06:06:39 GMT

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

Ted Yu updated HBASE-15075:
---------------------------
    Attachment: HBASE-15075.v8.patch

Patch v8 fixes test failure in TestSplitTransactionOnCluster due to missing null check.

> Allow region split request to carry identification information
> --------------------------------------------------------------
>
>                 Key: HBASE-15075
>                 URL: https://issues.apache.org/jira/browse/HBASE-15075
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Ted Yu
>            Assignee: Ted Yu
>             Fix For: 2.0.0, 1.3.0
>
>         Attachments: 15075-v0.txt, 15075-v1.txt, 15075-v2.txt, HBASE-15075.v2.patch,
HBASE-15075.v3.patch, HBASE-15075.v4.patch, HBASE-15075.v5.patch, HBASE-15075.v6.patch, HBASE-15075.v7.patch,
HBASE-15075.v8.patch
>
>
> 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, such as a UUID, 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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