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From "V@ni" <vanitha...@gmail.com>
Subject Re: slave nodes could not connect to Master .
Date Thu, 11 Aug 2011 10:19:18 GMT

Hi, This can be SSH configuration error. Reinstall SSH and try connecting to
the master node. Hope it works

May be dis link might be useful 
http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-multi-node-cluster/ 
http://www.michael-noll.com/tutorials/running-hadoop-on-ubuntu-linux-multi-node-cluster/ 




sachinites wrote:
> 
> Sir , I tried everywhere on all forums , but could not resoleve this
> problem . please help me out .
> 
> I followed your tutorial to run the hadoop , first running a datanode
> locally on the same machine . and it all worked fine . 
> 
> Then , i configured hadoop to run the namenode , secondarynamenode & and a
> job tracker and a datanode on one machine , the master , and other two
> machines as slaves . Total of three datanodes . start-all.sh successfully
> start all daemons on all required nodes .
> But is seems , that only the datanode running locally on my machine is
> executing the whole job , the rest two slaves are starving for the
> connection with the masters. Their tasktracker logs reads (same on both
> slaves ):
> 
> 2011-08-09 07:09:54,099 INFO org.apache.hadoop.ipc.Server: IPC Server
> Responder: starting
> 2011-08-09 07:09:54,100 INFO org.apache.hadoop.ipc.Server: IPC Server
> listener on 37874: starting
> 2011-08-09 07:09:54,103 INFO org.apache.hadoop.ipc.Server: IPC Server
> handler 0 on 37874: starting
> 2011-08-09 07:09:54,104 INFO org.apache.hadoop.ipc.Server: IPC Server
> handler 1 on 37874: starting
> 2011-08-09 07:09:54,104 INFO org.apache.hadoop.ipc.Server: IPC Server
> handler 2 on 37874: starting
> 2011-08-09 07:09:54,105 INFO org.apache.hadoop.ipc.Server: IPC Server
> handler 3 on 37874: starting
> 2011-08-09 07:09:54,105 INFO org.apache.hadoop.mapred.TaskTracker:
> TaskTracker up at: localhost/127.0.0.1:37874
> 2011-08-09 07:09:54,105 INFO org.apache.hadoop.mapred.TaskTracker:
> Starting tracker tracker_gislab-desktop:localhost/127.0.0.1:37874
> 2011-08-09 07:09:55,145 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 0 time(s).
> 2011-08-09 07:09:56,146 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 1 time(s).
> 2011-08-09 07:09:57,147 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 2 time(s).
> 2011-08-09 07:09:58,148 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 3 time(s).
> 2011-08-09 07:09:59,149 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 4 time(s).
> 2011-08-09 07:10:00,150 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 5 time(s).
> 2011-08-09 07:10:01,151 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 6 time(s).
> 2011-08-09 07:10:02,151 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 7 time(s).
> 2011-08-09 07:10:03,152 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 8 time(s).
> 2011-08-09 07:10:04,153 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 9 time(s).
> 2011-08-09 07:10:04,156 INFO org.apache.hadoop.ipc.RPC: Server at
> /10.14.11.32:9001 not available yet, Zzzzz...
> 2011-08-09 07:10:06,158 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 0 time(s).
> 2011-08-09 07:10:07,159 INFO org.apache.hadoop.ipc.Client: Retrying
> connect to server: /10.14.11.32:9001. Already tried 1 time(s).
> 
> .... and continues. I tried re-enable the ipv6 address , but in vain . The
> data in HDFS is distributed on all datanodes though. This confirms its not
> a network problem also . I can password-lessely ssh in all directions .
> 
> Sir, please help . I shall be grateful to you.
> 
> Abhishek
> Masters Student
> IIT Bombay
> INDIA
> 
> 

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