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From Uma Maheswara Rao G 72686 <mahesw...@huawei.com>
Subject Re: java.io.IOException: Incorrect data format
Date Wed, 21 Sep 2011 04:10:03 GMT
Can you check what is the value for command 'df -h'in NN machine.
I think, one more possibility could be that while saving image itself it would have been currupted.

To avoid such cases it has been already handled in trunk.For more details
https://issues.apache.org/jira/browse/HDFS-1594

Regards,
Uma
----- Original Message -----
From: "Peng, Wei" <Wei.Peng@xerox.com>
Date: Wednesday, September 21, 2011 9:01 am
Subject: java.io.IOException: Incorrect data format
To: common-user@hadoop.apache.org

> I was not able to restart my name server because I the name server ran
> out of space. Then I adjusted dfs.datanode.du.reserved to 0, and used
> tune2fs -m to get some space, but I still could not restart the name
> node. 
> 
> 
> 
> I got the following error:
> 
> java.io.IOException: Incorrect data format. logVersion is -18 but
> writables.length is 0.
> 
> 
> 
> Anyone knows how to resolve this issue?
> 
> 
> 
> Best,
> 
> Wei
> 
> 
> 
> 

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