What version of Hadoop are you/were you on? And did you run an NN upgrade recently?
Can you also pastebin the full logs somewhere? On Tue, Nov 6, 2012 at 11:34 AM, chendaya <chend...@inspur.com> wrote: > Hi, everyone > I am getting this error in one or two nodes in a hadoop cluster where rest of > the nodes are running fine: > ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: > ***** Upgrade is not supported from this older version of storage to the > current version. Please upgrade to Hadoop-0.14 or a later version and then > upgrade to current version. Old layout version is 'too old' and latest layout > version this software version can upgrade from is -7. > Any idea how to fix this prob. without losing the data. > > Many Thanks!! > > Daya Chen -- Harsh J
