[jira] [Commented] (HBASE-5617) Provide coprocessor hooks in put flow while rollbackMemstore.

["ramkrishna.s.vasudevan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-5617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13476065#comment-13476065 ] 

ramkrishna.s.vasudevan commented on HBASE-5617:
-----------------------------------------------

I would like to revive this patch? Thougths...?
                
> Provide coprocessor hooks in put flow while rollbackMemstore.
> -------------------------------------------------------------
>
>                 Key: HBASE-5617
>                 URL: https://issues.apache.org/jira/browse/HBASE-5617
>             Project: HBase
>          Issue Type: Improvement
>          Components: Coprocessors
>            Reporter: ramkrishna.s.vasudevan
>            Assignee: ramkrishna.s.vasudevan
>             Fix For: 0.96.0
>
>         Attachments: HBASE-5617_1.patch, HBASE-5617_2.patch
>
>
> With coprocessors hooks while put happens we have the provision to create new puts to other tables or regions.  These puts can be done with writeToWal as false.
> In 0.94 and above the puts are first written to memstore and then to WAL.  If any failure in the WAL append or sync the memstore is rollbacked.  
> Now the problem is that if the put that happens in the main flow fails there is no way to rollback the 
> puts that happened in the prePut.
> We can add coprocessor hooks to like pre/postRoolBackMemStore.  Is any one hook enough here?

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