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https://issues.apache.org/jira/browse/HBASE-25709?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiaolin Ha resolved HBASE-25709.
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Release Note: (was: Both compacting scanners and user scanners should
return promptly, when there are many skipped cells.)
Resolution: Fixed
Merged to branch-2.5+, thanks [~bbeaudreault] for reviewing, and thanks all the
feedbacks!
> Close region may stuck when region is compacting and skipped most cells read
> ----------------------------------------------------------------------------
>
> Key: HBASE-25709
> URL: https://issues.apache.org/jira/browse/HBASE-25709
> Project: HBase
> Issue Type: Bug
> Components: Compaction
> Affects Versions: 1.7.1, 3.0.0-alpha-2, 2.4.10
> Reporter: Xiaolin Ha
> Assignee: Xiaolin Ha
> Priority: Major
> Fix For: 2.6.0, 3.0.0-alpha-4, 2.5.4
>
> Attachments: Master-UI-RIT.png, RS-region-state.png
>
>
> We found in our cluster about stop region stuck. The region is compacting,
> and its store files has many TTL expired cells. Close region state
> marker(HRegion#writestate.writesEnabled) is not checked in compaction,
> because most cells were skipped.
> !RS-region-state.png|width=698,height=310!
>
> !Master-UI-RIT.png|width=693,height=157!
>
> HBASE-23968 has encountered similar problem, but the solution in it is outer
> the method
> InternalScanner#next(List<Cell> result, ScannerContext scannerContext), which
> will not return if there are many skipped cells, for current compaction
> scanner context. As a result, we need to return in time in the next method,
> and then check the stop marker.
>
>
>
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