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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1096) Does not recover if HRS carrying -ROOT- goes down
Date Wed, 31 Dec 2008 06:08:44 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1096?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12660025#action_12660025
] 

stack commented on HBASE-1096:
------------------------------

This is message from up on list:

{code}
Date: Mon, 29 Dec 2008 13:27:48 -0500
From: g00dn3ss <g00dn3ss@gmail.com>
To: hbase-user@hadoop.apache.org
Subject: Re: Recovering HBase after HDFS Corruption


...Then I restart the
system.  Some of the regionservers get "FileNotFound" exceptions when
looking for some of the corrupted files.  Then the affected regionservers
shut down.   So I don't understand how the problem I'm seeing could be
caused by having something in memory that doesn't match what's on disk if I
am starting the entire system from scratch.

The other issue that causes further problems in this case is when one of
these problematic regions is on the same regionserver as the -ROOT- region.
When the regionserver holding the -ROOT- region crashes, the entire system
seems to go down.  Is this what
http://issues.apache.org/jira/browse/HBASE-1080 is about?
...
{code}

> Does not recover if HRS carrying -ROOT- goes down
> -------------------------------------------------
>
>                 Key: HBASE-1096
>                 URL: https://issues.apache.org/jira/browse/HBASE-1096
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>             Fix For: 0.19.0
>
>
> From the list:
> Trunk does not recover if ROOT goes down. Had an instance of
> this last night. 
>    - Andy
> > > From: stack <stack@duboce.net>
> > > Subject: Re: Recovering HBase 
> [...]
> > > System should recover when region hosting -ROOT- goes down.
> > > Which version of hbase (pardon me if you've already said
> > > which version)?
> > > 
> > > St.Ack

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