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Date: Fri, 8 Nov 2013 23:46:17 +0000 (UTC)
From: "Jimmy Xiang (JIRA)" <jira@apache.org>
To: issues@hbase.apache.org
Message-ID: <JIRA.12678277.1383934164773.45269.1383954377593@arcas>
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References: <JIRA.12678277.1383934164773@arcas>
Subject: [jira] [Commented] (HBASE-9926) Scanner doesn't check if a region
 is available
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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 ] 

Jimmy Xiang commented on HBASE-9926:
------------------------------------

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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