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https://issues.apache.org/jira/browse/HBASE-15075?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ted Yu updated HBASE-15075:
---------------------------
Description:
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
was:
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
> 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, 15075-v2.txt,
> HBASE-15075.v2.patch, HBASE-15075.v3.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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