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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-4277) HRS.closeRegion should be able to close regions with only the encoded name
Date Mon, 29 Aug 2011 08:19:38 GMT
HRS.closeRegion should be able to close regions with only the encoded name
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                 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
             Fix For: 0.90.5


As suggested by Stack in HBASE-4217 creating a new issue to proved 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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