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From Merto Mertek <masmer...@gmail.com>
Subject Re: slave nodes could not connect to Master .
Date Wed, 26 Oct 2011 02:02:19 GMT
Same problem here.. Sachinites have you found a solution?
I have three nodes where situation is the same as described above.. Pinging
and ssh-ing to the master node works ok, however logs are full of the
following info:

"INFO org.apache.hadoop.ipc.Client: Retrying connect to server:
hadoopmaster/192.168.12.1:54310"

Jobtracker sees just one node (http://hadoopmaster:50030/jobtracker.jsp ->
probably the local one). Hadoopmaster node has the following process: "
127.0.0.1:54310         0.0.0.0:*               LISTEN      1001
17909       5131/java " so the problem is probably elsewhere..

Do you have any idea what could be wrong?


On 11 August 2011 12:19, V@ni <vanitham89@gmail.com> wrote:

>
> 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
> >
> >
>
> --
> View this message in context:
> http://old.nabble.com/slave-nodes-could-not-connect-to-Master-.-tp32223105p32240913.html
> Sent from the Hadoop core-dev mailing list archive at Nabble.com.
>
>

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