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From stack <st...@duboce.net>
Subject Re: Recovering HBase after HDFS Corruption
Date Mon, 29 Dec 2008 18:37:58 GMT
g00dn3ss wrote:
> So the thing that doesn't make sense to me in your above statement is that I
> stop the entire HBase instance including the master.  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.
>
>   
Agreed.  Something else is going on.  Can we see logs?

> 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?
>   

No.  1080 is about an odd deadlock in master (May have been resolved by 
543).

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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