Mostly the conf or presence of a firewall. Sometimes wrong interface 'listening'.
On 6 Sep 2010 23:48, "Mark" <static.void....@gmail.com> wrote: I am trying to configure out distributed Hadoop setup but for some reason my datanodes can not connect to the namenode. 2010-09-06 04:06:05,040 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 0 time(s). 2010-09-06 04:06:06,041 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 1 time(s). 2010-09-06 04:06:07,042 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 2 time(s). 2010-09-06 04:06:08,042 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 3 time(s). 2010-09-06 04:06:09,043 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 4 time(s). 2010-09-06 04:06:10,043 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 5 time(s). 2010-09-06 04:06:11,044 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 6 time(s). 2010-09-06 04:06:12,044 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 7 time(s). 2010-09-06 04:06:13,045 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 8 time(s). 2010-09-06 04:06:14,045 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: /10.101.102.11:9000. Already tried 9 time(s). 2010-09-06 04:06:14,048 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Call to /10.101.102.11:9000 failed on local exception: java.net.NoRouteToHostException: No route to host I also can't connect to master-hadoop:50070 or master-hadoop:50030 from any other machine but the master/name node. Any ideas why this may be happening? Thanks.
