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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-869) On split, if failure updating of .META., table subsequently broke
Date Thu, 04 Sep 2008 18:17:44 GMT
On split, if failure updating of .META., table subsequently broke
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                 Key: HBASE-869
                 URL: https://issues.apache.org/jira/browse/HBASE-869
             Project: Hadoop HBase
          Issue Type: Bug
            Reporter: stack


On pset cluster -- running 0.2.0 -- I saw the following:

+ Deadlock on server carrying .META. made the .META. table inaccessible (deadlock has been
fixed)
+ Out on a regionserver, we split; two new daughters are created and parent region is closed.
+ Regionserver fails to update the .META. with change in parent state and addition of two
new daughter regions

Restarting the server carrying .META. got us over the deadlock but subsequently, the parent
region is no longer online nor its replacements.

Attempting restart of regionserver to see if parent will come back on line (since it was not
'offlined' in .META. should come back on line again and resplit).  Ugly will be the fact that
the filesystem has some trash in it -- the new daughter regions.

To consider: Do not close the parent until the .META. has been successfully updated.  Also,
if .META. update fails, remove daughter regions.

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