[jira] [Resolved] (HBASE-22623) Add RegionObserver coprocessor hook for preWALAppend

["Andrew Purtell (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-22623?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Purtell resolved HBASE-22623.
------------------------------------
      Resolution: Fixed
    Hadoop Flags: Reviewed

Merged to master, picked to branch-2.
Merged to branch-1.

Please add a release note. 
Thanks [~gjacoby]

> Add RegionObserver coprocessor hook for preWALAppend
> ----------------------------------------------------
>
>                 Key: HBASE-22623
>                 URL: https://issues.apache.org/jira/browse/HBASE-22623
>             Project: HBase
>          Issue Type: New Feature
>            Reporter: Geoffrey Jacoby
>            Assignee: Geoffrey Jacoby
>            Priority: Major
>             Fix For: 3.0.0, 1.5.0, 2.3.0
>
>
> While many coprocessor hooks expose the WALEdit to implementing coprocs, there aren't any that expose the WALKey before it's created and added to the WALEntry. 
> It's sometimes useful for coprocessors to be able to edit the WALKey, for example to add extended attributes using the fields to be added in HBASE-22622. 



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