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I get following exception - when I run Hadoop in the Multi node (2) environment.

Master - Node - My Laptop - ubuntu 13 Kylin (

Slave Node - Ubuntu 12 VM

I follow -


Data Node - configuration -

conf/slaves (master only)

This conf/slaves file lists the hosts, one per line, where the Hadoop slave daemons (datanodes and tasktrackers) will be run. We want both the master box ( and the slave box to act as Hadoop slaves because we want both of them to store and process data.

master slave

Now when I run the - shart-dfs.sh command,in Master(NameNode) I found both in Master and slave (Ubuntu VM) node Log file following exception in DATA Node Log file.

WARN org.apache.hadoop.hdfs.server.datanode.DataNode: org.apache.hadoop.ipc.RemoteException: java.io.IOException: ProcessReport from dead or unregisterted node:

That means -

1) Ubuntu - VM box (slave) DATA Node running Fine.

2) Problem with as I guess - when master node ( to behave as Data Node as mentioned in the link.

But when I do the JPS - both node shows expected result that Data node is running.

How Can I resolve this issue.

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