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https://issues.apache.org/jira/browse/HBASE-1050?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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stack updated HBASE-1050:
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Priority: Blocker (was: Major)
Fix Version/s: 0.20.0
Others have reported this phenomeon on list. Marking blocker against 0.20.0.
Gets in the way of our scaling.
> Allow regions to split around scanners
> --------------------------------------
>
> Key: HBASE-1050
> URL: https://issues.apache.org/jira/browse/HBASE-1050
> Project: Hadoop HBase
> Issue Type: Improvement
> Components: client, regionserver
> Reporter: Andrew Purtell
> Priority: Blocker
> Fix For: 0.20.0
>
>
> We have a number of scanners iterating over a table that also sees a lot of
> constant write activity. If the scans are too frequent we will suppress
> splitting. At a lull then a number of splits happen all at once, occasionally
> overwhelming DFS and causing file corruption.
> I wonder how much work it would be to split regions around scanners. Rather
> than wait for scanner leases to expire, suspend/block the scanner, split the
> table, and then negotiate with the client to continue.
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