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https://issues.apache.org/jira/browse/HBASE-16119?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Stephen Yuan Jiang updated HBASE-16119:
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Hadoop Flags: Incompatible change,Reviewed (was: Reviewed)
Release Note:
The merge region logic is controlled by master in 2.0.0 (in 1.x, the core merge
region logic is in the region server side). The coprocessors related to merge
region in RS-side would be no-op in 2.0.0 and later release. Therefore, this
is an incompatible change. Users needs to move the CP logic to new master CP
and registers them.
A new mergeRegionsAsync() API is added in client. The existing mergeRegions()
API will call the new API so client does not have to change its code.
> Procedure v2 - Reimplement merge
> --------------------------------
>
> Key: HBASE-16119
> URL: https://issues.apache.org/jira/browse/HBASE-16119
> Project: HBase
> Issue Type: Sub-task
> Components: proc-v2, Region Assignment
> Affects Versions: 2.0.0
> Reporter: Matteo Bertozzi
> Assignee: Stephen Yuan Jiang
> Fix For: 2.0.0
>
> Attachments: HBASE-16119.v1-master.patch, HBASE-16119.v2-master.patch
>
>
> use the proc-v2 state machine for merge. also update the logic to have a
> single meta-writer.
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