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From S D <sd.codewarr...@gmail.com>
Subject Re: Regarding "Hadoop multi cluster" set-up
Date Wed, 04 Feb 2009 17:40:30 GMT
Shefali,

Is your firewall blocking port 54310 on the master?

John

On Wed, Feb 4, 2009 at 12:34 PM, shefali pawar <shefali_p@rediffmail.com>wrote:

> Hi,
>
> I am trying to set-up a two node cluster using Hadoop0.19.0, with 1
> master(which should also work as a slave) and 1 slave node.
>
> But while running bin/start-dfs.sh the datanode is not starting on the
> slave. I had read the previous mails on the list, but nothing seems to be
> working in this case. I am getting the following error in the
> hadoop-root-datanode-slave log file while running the command
> bin/start-dfs.sh =>
>
> 2009-02-03 13:00:27,516 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG:
> /************************************************************
> STARTUP_MSG: Starting DataNode
> STARTUP_MSG:   host = slave/172.16.0.32
> STARTUP_MSG:   args = []
> STARTUP_MSG:   version = 0.19.0
> STARTUP_MSG:   build =
> https://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.19 -r
> 713890; compiled by 'ndaley' on Fri Nov 14 03:12:29 UTC 2008
> ************************************************************/
> 2009-02-03 13:00:28,725 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 0 time(s).
> 2009-02-03 13:00:29,726 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 1 time(s).
> 2009-02-03 13:00:30,727 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 2 time(s).
> 2009-02-03 13:00:31,728 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 3 time(s).
> 2009-02-03 13:00:32,729 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 4 time(s).
> 2009-02-03 13:00:33,730 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 5 time(s).
> 2009-02-03 13:00:34,731 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 6 time(s).
> 2009-02-03 13:00:35,732 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 7 time(s).
> 2009-02-03 13:00:36,733 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 8 time(s).
> 2009-02-03 13:00:37,734 INFO org.apache.hadoop.ipc.Client: Retrying connect
> to server: master/172.16.0.46:54310. Already tried 9 time(s).
> 2009-02-03 13:00:37,738 ERROR
> org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Call
> to master/172.16.0.46:54310 failed on local exception: No route to host
>        at org.apache.hadoop.ipc.Client.call(Client.java:699)
>        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:216)
>        at $Proxy4.getProtocolVersion(Unknown Source)
>        at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:319)
>        at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:306)
>        at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:343)
>        at org.apache.hadoop.ipc.RPC.waitForProxy(RPC.java:288)
>        at
> org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:258)
>        at
> org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:205)
>        at
> org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1199)
>        at
> org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1154)
>        at
> org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1162)
>        at
> org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1284)
> Caused by: java.net.NoRouteToHostException: No route to host
>        at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
>        at
> sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:574)
>        at sun.nio.ch.SocketAdaptor.connect(SocketAdaptor.java:100)
>        at
> org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:299)
>        at
> org.apache.hadoop.ipc.Client$Connection.access$1700(Client.java:176)
>        at org.apache.hadoop.ipc.Client.getConnection(Client.java:772)
>        at org.apache.hadoop.ipc.Client.call(Client.java:685)
>        ... 12 more
>
> 2009-02-03 13:00:37,739 INFO
> org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
> /************************************************************
> SHUTDOWN_MSG: Shutting down DataNode at slave/172.16.0.32
> ************************************************************/
>
>
> Also, the Pseudo distributed operation is working on both the machines. And
> i am able to ssh from 'master to master' and 'master to slave' via a
> password-less ssh login. I do not think there is any problem with the
> network because cross pinging is working fine.
>
> I am working on Linux (Fedora 8)
>
> The following is the configuration which i am using
>
> On master and slave, <HADOOP_INSTALL>/conf/masters looks like this:
>
>  master
>
> On master and slave, <HADOOP_INSTALL>/conf/slaves looks like this:
>
>  master
>  slave
>
> On both the machines conf/hadoop-site.xml looks like this
>
>  <property>
>   <name>fs.default.name</name>
>   <value>hdfs://master:54310</value>
>   <description>The name of the default file system.  A URI whose
>   scheme and authority determine the FileSystem implementation.  The
>   uri's scheme determines the config property (fs.SCHEME.impl) naming
>   the FileSystem implementation class.  The uri's authority is used to
>   determine the host, port, etc. for a filesystem.</description>
>  </property>
>  <property>
>   <name>mapred.job.tracker</name>
>   <value>master:54311</value>
>   <description>The host and port that the MapReduce job tracker runs
>   at.  If "local", then jobs are run in-process as a single map
>   and reduce task.
>   </description>
>  </property>
>  <property>
>   <name>dfs.replication</name>
>   <value>2</value>
>   <description>Default block replication.
>   The actual number of replications can be specified when the file is
> created.
>   The default is used if replication is not specified in create time.
>   </description>
>  </property>
>
> namenode is formatted succesfully by running
>
> "bin/hadoop namenode -format"
>
> on the master node.
>
> I am new to Hadoop and I do not know what is going wrong.
>
> Any help will be appreciated.
>
> Thanking you in advance
>
> Shefali Pawar
> Pune, India
>

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