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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-3026) Fixup of "missing" daughters on split is too aggressive
Date Wed, 22 Sep 2010 06:40:36 GMT

     [ https://issues.apache.org/jira/browse/HBASE-3026?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-3026:
-------------------------

    Attachment: 3026.txt

Here''s a patch that goes back to the META to check if daughters are present.

Testing it now.

> Fixup of "missing" daughters on split is too aggressive
> -------------------------------------------------------
>
>                 Key: HBASE-3026
>                 URL: https://issues.apache.org/jira/browse/HBASE-3026
>             Project: HBase
>          Issue Type: Bug
>          Components: master
>            Reporter: stack
>             Fix For: 0.90.0
>
>         Attachments: 3026.txt
>
>
> There is a bug in how we check for whether the daughters mentioned in parent region are
present in .META.  The check is done when we are processing a server shutdown.  We're making
the mistake of checking for presence of the daughter in the list of regions that used to live
on the crashed server BUT fact of the matter is is that the daughter could just as well be
rebalanced to another server.
> The upshot is that we are inserting into .META. and trying to assign regions that are
already assigned.

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