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https://issues.apache.org/jira/browse/HBASE-15585?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15222535#comment-15222535
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Enis Soztutar commented on HBASE-15585:
---------------------------------------

{code}
diff --git 
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionServerObserver.java
 
hbase-server/src/main/java/org/apache/hadoop/hbase/coprocessor/RegionServerObserver.java
{code}
We should do the same for {{MasterObserver}} as well. Not being able to 
override master and regionserver together will not result in ultimate 
flexibility. -1 until that is addressed. 

> RegionServer coprocessors are not flexible enough
> -------------------------------------------------
>
>                 Key: HBASE-15585
>                 URL: https://issues.apache.org/jira/browse/HBASE-15585
>             Project: HBase
>          Issue Type: Bug
>          Components: Coprocessors, regionserver
>            Reporter: Sergey Shelukhin
>            Assignee: Sergey Shelukhin
>         Attachments: HBASE-15585.01.patch, HBASE-15585.patch
>
>
> While you can do all kinds of things with coprocessors, like arbitrarily 
> discard memstore data or replace files randomly during compaction, I believe 
> the ultimate power and flexibility is not there. The patch aims to address 
> this shortcoming.



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