Hello, We are running an hdfs cluster and we decided we wanted to add a new datanode. Since we are using a virtual machine, we just cloned an existing datanode. We added it to the slaves list and started up the cluster. We started getting log messages like this in the namenode log:
2011-05-11 15:59:44,148 ERROR hdfs.StateChange - BLOCK* NameSystem.getDatanode: Data node 10.104.211.58:50010 is attempting to report storage ID DS-1360904153-10.104.211.57-50010-1293288346692. Node 10.104.211.57:50010 is expected to serve this storage. 2011-05-11 15:59:46,975 ERROR hdfs.StateChange - BLOCK* NameSystem.getDatanode: Data node 10.104.211.57:50010 is attempting to report storage ID DS-1360904153-10.104.211.57-50010-1293288346692. Node 10.104.211.58:50010 is expected to serve this storage. I understand that this is because the datanodes have the exact same information so the first data node that connects has precedence. Is it possible to just wipe one of the datanodes so it is blank or do we have to format the entire hdfs filesystem from the namenode to add the new datanode. Thanks, Steve Cohen
