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https://issues.apache.org/jira/browse/HBASE-18905?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16217571#comment-16217571
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stack commented on HBASE-18905:
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bq. Just want to follow the other methods below, beforeExecution and
afterExecution. And the word 'fail' may give users an impression that something
serious is happened, but here it usually only means that there is already a
flush ongoing.
Ok.
> Allow CPs to request flush on Region and know the completion of the requested
> flush
> -----------------------------------------------------------------------------------
>
> Key: HBASE-18905
> URL: https://issues.apache.org/jira/browse/HBASE-18905
> Project: HBase
> Issue Type: Sub-task
> Components: Coprocessors
> Reporter: Anoop Sam John
> Assignee: Duo Zhang
> Fix For: 2.0.0-alpha-4
>
> Attachments: HBASE-18905.patch, HBASE-18905.patch
>
>
> Follow up for HBASE-18183
> As per that Jira, we keep only requestCompaction API in Region. We did not
> have any such for flush in Region. Only API which was there is a flush which
> will block the callee unless flush is done. This issue has to tacke
> 1. Decide whether we need a requestFlush in Region and if so add
> 2. Whether the requestCompaction (And requestFlush too) should return a
> Future? Right now the former do not return any but allow to pass a
> CompactionLifeCycleTracker which will get notified on start and end of
> compaction.
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