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From sachinites <sachini...@gmail.com>
Subject slave nodes could not connect to Master .
Date Tue, 09 Aug 2011 02:16:13 GMT

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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