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Hadoop, mail # user - getting UnknownHostException


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Re: getting UnknownHostException
madhu phatak 2012-04-13, 05:19
Please check contents of /etc/hosts for the hostname and ipaddress mapping.

On Thu, Apr 12, 2012 at 11:11 PM, Sujit Dhamale <[EMAIL PROTECTED]>wrote:

> Hi Friends ,
> i am getting UnknownHostException while executing Hadoop Word count program
>
> getting below details from job tracker Web page
>
> *User:* sujit
> *Job Name:* word count
> *Job File:*
>
> hdfs://localhost:54310/app/hadoop/tmp/mapred/staging/sujit/.staging/job_201204112234_0002/job.xml<
> http://localhost:50030/jobconf.jsp?jobid=job_201204112234_0002>
> *Submit Host:* sujit.(null)
> *Submit Host Address:* 127.0.1.1
> *Job-ACLs: All users are allowed*
> *Job Setup:*None
> *Status:* Failed
> *Failure Info:*Job initialization failed: java.net.UnknownHostException:
> sujit.(null) is not a valid Inet address at org.apache.hadoop.net.
> NetUtils.verifyHostnames(NetUtils.java:569) at
> org.apache.hadoop.mapred.JobInProgress.initTasks(JobInProgress.java:711) at
> org.apache.hadoop.mapred.JobTracker.initJob(JobTracker.java:4207) at
>
> org.apache.hadoop.mapred.EagerTaskInitializationListener$InitJob.run(EagerTaskInitializationListener.java:79)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> at
>
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> at java.lang.Thread.run(Thread.java:662)
> *Started at:* Wed Apr 11 22:36:46 IST 2012
> *Failed at:* Wed Apr 11 22:36:47 IST 2012
> *Failed in:* 0sec
> *Job Cleanup:*None
>
>
>
>
> Can some one help me how to resolve this issue .
> i tried with : http://wiki.apache.org/hadoop/UnknownHost
>
> but still not able to resolve issue ,
> please help me out .
>
>
> Hadoop Version: hadoop-1.0.1.tar.gz
> java version "1.6.0_30"
> Operating System : Ubuntu 11.10
>
>
> *Note *: All node were up before starting execution of Program
>
> Kind Regards
> Sujit Dhamale
> <http://wiki.apache.org/hadoop/UnknownHost>
>

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