Sir, Is the datanode shown as live in the web interface? Me too an amateur. Just asking out of curiosity.
On Tue, Jul 5, 2011 at 6:13 PM, Sudharsan Sampath <sudha...@gmail.com>wrote: > Hi, > > In one of my jobs I am getting the following error. > > java.io.IOException: File X could only be replicated to 0 nodes, instead of > 1 > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1282) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:469) > at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:512) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:968) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:964) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:962) > > and the job fails. I am running a single server that runs all the hadoop > daemons. So only one datanode in my scenario. > > The datanode was up all the time. > There is enough space on the disk. > Even on debug level, I do not see any of the following logs > > > Node X " is not chosen because the node is (being) decommissioned > because the node does not have enough space > because the node is too busy > because the rack has too many chosen nodes > > Do anyone know of anyother scenario in which occur ? > > Thanks > Sudharsan S > -- Regards, R.V.
