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https://issues.apache.org/jira/browse/HBASE-9926?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13817855#comment-13817855
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Jimmy Xiang commented on HBASE-9926:
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The region is switched. In HRegionServer#scan, we do all checking based on the
new HRegion instance. In the scanner, we use the cached old HRegion instance.
Let me put the old instance in the RegionScannerHolder.
> Scanner doesn't check if a region is available
> ----------------------------------------------
>
> Key: HBASE-9926
> URL: https://issues.apache.org/jira/browse/HBASE-9926
> Project: HBase
> Issue Type: Bug
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Attachments: trunk-9926.patch
>
>
> Currently the scanner doesn't check if a region is closing/closed. If a
> region is closed, then reopened, an old scanner could still refer to the
> closed HRegion instance. So the scanner will miss some store file changes
> due to compaction.
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