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https://issues.apache.org/jira/browse/HBASE-4277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13141289#comment-13141289
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stack commented on HBASE-4277:
------------------------------
++1 on commit (smile)
> HRS.closeRegion should be able to close regions with only the encoded name
> --------------------------------------------------------------------------
>
> Key: HBASE-4277
> URL: https://issues.apache.org/jira/browse/HBASE-4277
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.90.4
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Priority: Critical
> Fix For: 0.90.5
>
> Attachments: HBASE-4277_0.90.patch
>
>
> As suggested by Stack in HBASE-4217 creating a new issue to provide a patch
> for 0.90.x version.
> We had some sort of an outage this morning due to a few racks losing power,
> and some regions were left in the following state:
> ERROR: Region UNKNOWN_REGION on sv4r17s9:60020,
> key=e32bbe1f48c9b3633c557dc0291b90a3, not on HDFS or in META but deployed on
> sv4r17s9:60020
> That region was deleted by the master but the region server never got the
> memo. Right now there's no way to force close it because HRS.closeRegion
> requires an HRI and the only way to create one is to get it from .META. which
> in our case doesn't contain a row for that region. Basically we have to wait
> until that server is dead to get rid of the region and make hbck happy.
> The required change is to have closeRegion accept an encoded name in both HBA
> (when the RS address is provided) and HRS since it's able to find it anyways
> from it's list of live regions.
> bq.If a 0.90 version, we maybe should do that in another issue.
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