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https://issues.apache.org/jira/browse/HBASE-12319?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14203708#comment-14203708
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Andrew Purtell commented on HBASE-12319:
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If this was critical as you say and meant for 0.98 why did you wait until after
the 0.98.8RC0 was cut before posting an update? The RC date was announced days
in advance. I'm not inclined to do it over except for a blocker so this may
wait for the next release.
> Inconsistencies during region recovery due to close/open of a region during
> recovery
> ------------------------------------------------------------------------------------
>
> Key: HBASE-12319
> URL: https://issues.apache.org/jira/browse/HBASE-12319
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.7, 0.99.1
> Reporter: Devaraj Das
> Assignee: Jeffrey Zhong
> Priority: Critical
> Fix For: 2.0.0, 0.98.9, 0.99.2
>
> Attachments: HBASE-12319-v2.patch, HBASE-12319.patch
>
>
> In one of my test runs, I saw the following:
> {noformat}
> 2014-10-14 13:45:30,782 DEBUG
> [StoreOpener-51af4bd23dc32a940ad2dd5435f00e1d-1] regionserver.HStore: loaded
> hdfs://hor9n01.gq1.ygridcore.net:8020/apps/hbase/data/data/default/IntegrationTestIngest/51af4bd23dc32a940ad2dd5435f00e1d/test_cf/d6df5cfe15ca41d68c619489fbde4d04,
> isReference=false, isBulkLoadResult=false, seqid=141197, majorCompaction=true
> 2014-10-14 13:45:30,788 DEBUG [RS_OPEN_REGION-hor9n01:60020-1]
> regionserver.HRegion: Found 3 recovered edits file(s) under
> hdfs://hor9n01.gq1.ygridcore.net:8020/apps/hbase/data/data/default/IntegrationTestIngest/51af4bd23dc32a940ad2dd5435f00e1d
> .............
> .............
> 2014-10-14 13:45:31,916 WARN [RS_OPEN_REGION-hor9n01:60020-1]
> regionserver.HRegion: Null or non-existent edits file:
> hdfs://hor9n01.gq1.ygridcore.net:8020/apps/hbase/data/data/default/IntegrationTestIngest/51af4bd23dc32a940ad2dd5435f00e1d/recovered.edits/0000000000000198080
> {noformat}
> The above logs is from a regionserver, say RS2. From the initial analysis it
> seemed like the master asked a certain regionserver to open the region (let's
> say RS1) and for some reason asked it to close soon after. The open was still
> proceeding on RS1 but the master reassigned the region to RS2. This also
> started the recovery but it ended up seeing an inconsistent view of the
> recovered-edits files (it reports missing files as per the logs above) since
> the first regionserver (RS1) deleted some files after it completed the
> recovery. When RS2 really opens the region, it might not see the recent data
> that was written by flushes on hor9n10 during the recovery process. Reads of
> that data would have inconsistencies.
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