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https://issues.apache.org/jira/browse/HBASE-9874?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13812033#comment-13812033
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Andrew Purtell commented on HBASE-9874:
---------------------------------------
In the cell ACL patch I add a CP hook for deciding what to do and handle this
for cell ACLs.
Let's extract that hook and add it here.
An increment can actually add up multiple cells, so a naive merge may produce a
resulting cell with several duplicate tags (or even tags with internal details
that conflict). No problem to do the naive thing by default and just carry all
tags found attached to the old cell(s) forward onto the new one. But then give
a CP a chance to optionally clean up the result.
Also, for cell ACLs, sometimes we don't want to carry old tags forward - if the
operation has a new ACL specified for the result. So again we need a hook to
override default behavior.
> Append and Increment operation drops Tags
> -----------------------------------------
>
> Key: HBASE-9874
> URL: https://issues.apache.org/jira/browse/HBASE-9874
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 0.98.0
> Reporter: Anoop Sam John
> Assignee: Anoop Sam John
> Fix For: 0.98.0
>
> Attachments: HBASE-9874.patch, HBASE-9874_V2.patch
>
>
> We should consider tags in the existing cells as well as tags coming in the
> cells within Increment/Append
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