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https://issues.apache.org/jira/browse/HBASE-15481?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15201648#comment-15201648
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Matteo Bertozzi commented on HBASE-15481:
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I think they are different. WALActionsListener is not pluggable and it should
be a lightweight internal notification.
the coprocessor is for the end-user and has all the heavy logic in
coprocessorHost.
> Add pre/post roll to WALObserver
> --------------------------------
>
> Key: HBASE-15481
> URL: https://issues.apache.org/jira/browse/HBASE-15481
> Project: HBase
> Issue Type: New Feature
> Affects Versions: 1.3.0
> Reporter: Matteo Bertozzi
> Assignee: Matteo Bertozzi
> Priority: Trivial
> Fix For: 2.0.0, 1.3.0
>
> Attachments: HBASE-15481-v0.patch, HBASE-15481-v1.patch
>
>
> currently the WALObserver has only a pre/post Write. It will be useful to
> have a pre/post Roll too.
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