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MapReduce, mail # user - NodeManager not able to connect to the ResourceManager (MRv2)


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NodeManager not able to connect to the ResourceManager (MRv2)
Praveen Sripati 2011-07-21, 14:36
Hi,

I followed the below instructions to compile the MRv2 code.

http://svn.apache.org/repos/asf/hadoop/common/branches/MR-279/mapreduce/INSTALL

I start the resourcemanager and then the nodemanager and see the following
error in the yarn-praveensripati-nodemanager-master.log file.

2011-07-21 19:39:54,125 INFO
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl: Connected
to ResourceManager at 0.0.0.0:8025
2011-07-21 19:39:58,151 INFO org.apache.hadoop.ipc.Client: Retrying connect
to server: /0.0.0.0:8025. Already tried 0 time(s).
2011-07-21 19:40:01,154 INFO org.apache.hadoop.ipc.Client: Retrying connect
to server: /0.0.0.0:8025. Already tried 1 time(s).
2011-07-21 19:40:05,158 INFO org.apache.hadoop.ipc.Client: Retrying connect
to server: /0.0.0.0:8025. Already tried 2 time(s).
...............
...............
2011-07-21 19:40:32,192 ERROR
org.apache.hadoop.yarn.service.CompositeService: Error starting services
org.apache.hadoop.yarn.server.nodemanager.NodeManager
org.apache.avro.AvroRuntimeException:
java.lang.reflect.UndeclaredThrowableException
        at
org.apache.hadoop.yarn.server.nodemanager.NodeStatusUpdaterImpl.start(NodeStatusUpdaterImpl.java:139)
...............
...............
Caused by: java.io.IOException: Call to /0.0.0.0:8025 failed on local
exception: java.net.NoRouteToHostException: No route to host
        at org.apache.hadoop.ipc.Client.wrapException(Client.java:1095)
        at org.apache.hadoop.ipc.Client.call(Client.java:1063)

Did a telnet to the 8025 port and it got connected.

telnet 0.0.0.0 8025
Trying 0.0.0.0...
Connected to 0.0.0.0.

telnet 127.0.0.1 8025
Trying 127.0.0.1...
Connected to 127.0.0.1.

Has anyone faced a similar problem? Also, where are all the possible
defaults specified (~ core-default.html) for MRv2?

Thanks,
Praveen