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From Uma Maheswara Rao G 72686 <mahesw...@huawei.com>
Subject Re: RE: RE: java.io.IOException: Incorrect data format
Date Wed, 21 Sep 2011 06:28:20 GMT

I would suggest you to clean some space and try.

Regards,
Uma

----- Original Message -----
From: "Peng, Wei" <Wei.Peng@xerox.com>
Date: Wednesday, September 21, 2011 10:03 am
Subject: RE: RE: java.io.IOException: Incorrect data format
To: common-user@hadoop.apache.org

> Yes, I can. The datanode is not able to start after crashing without
> enough HD space.
> 
> Wei
> 
> -----Original Message-----
> From: Uma Maheswara Rao G 72686 [mailto:maheswara@huawei.com] 
> Sent: Tuesday, September 20, 2011 9:30 PM
> To: common-user@hadoop.apache.org
> Subject: Re: RE: java.io.IOException: Incorrect data format
> 
> 
> Are you able to create the directory manually in the DataNode Machine?
> #mkdirs /state/partition2/hadoop/dfs/tmp
> 
> Regards,
> Uma
> ----- Original Message -----
> From: "Peng, Wei" <Wei.Peng@xerox.com>
> Date: Wednesday, September 21, 2011 9:44 am
> Subject: RE: java.io.IOException: Incorrect data format
> To: common-user@hadoop.apache.org
> 
> > I modified edits so that hadoop namenode is restarted, however, 
> I 
> > couldnot start my datanode. The datanode log shows
> > 
> > 2011-09-20 21:07:10,068 ERROR
> > org.apache.hadoop.hdfs.server.datanode.DataNode: 
> java.io.IOException:> Mkdirs failed to create 
> /state/partition2/hadoop/dfs/tmp>        at
> >
> org.apache.hadoop.hdfs.server.datanode.FSDataset$FSVolume.<init>(FSDatas
> > et.java:394)
> >        at
> >
> org.apache.hadoop.hdfs.server.datanode.FSDataset.<init>(FSDataset.java:8
> > 94)
> >        at
> >
> org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.j
> > ava:318)
> >        at
> >
> org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:232
> > )
> >        at
> >
> org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.ja
> > va:1363)
> >        at
> >
> org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(Data
> > Node.java:1318)
> >        at
> >
> org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.
> > java:1326)
> >        at
> >
> org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1448)
> > Wei
> > 
> > -----Original Message-----
> > From: Uma Maheswara Rao G 72686 [mailto:maheswara@huawei.com] 
> > Sent: Tuesday, September 20, 2011 9:10 PM
> > To: common-user@hadoop.apache.org
> > Subject: Re: java.io.IOException: Incorrect data format
> > 
> > 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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