ya, firewall is the most common issue. apart from that take a look at the namenode log too..just to make sure that its running without any error. try to ping the master-hadoop from the data node, to check if they are resolvable. If not try with the ip:50070
On Mon, Sep 6, 2010 at 11:51 PM, Harsh J <qwertyman...@gmail.com> wrote: > 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. >
