I have a hdoop cluster of 6 nodes. I node is a master nodes. All the nodes, including master node, are running TaskTracker & DataNode. The command
hadoop dfsadmin -report
Return only 3 data nodes including the DataNode running at master node. There are no errors on the console. Master node can SSH to these nodes and DataNode is running on the unreported nodes. I checked SSH loging to the un-reported nodes and by executing he JPS command. All the slave nodes have the following output:
ubuntu@slave2:¬/hadoop/logs$ jps
5007 TaskTracker
4868 DataNode
5261 Jps
How to look for unreported DataNodes in the dfsadmin command?