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From Yongwei Xing <jdxyw2...@gmail.com>
Subject Re: Map works well, but Redue failed
Date Sat, 16 Jun 2012 13:53:36 GMT
I did the following steps:

1.stop-all.sh
2.Delete the tmp folder
3.format namenode
4.start-all.sh

The problem has gone. Not sure what's the root cause.

Best Regards,

2012/6/16 Abhishek <abhishek.dodda1@gmail.com>

> Hi raj,
>
> I think you should increase the reducer worker threads,to fetch the map
> output.
>
> Regards
> Abhishek.
>
> Sent from my iPhone
>
> On Jun 15, 2012, at 9:42 PM, Raj Vishwanathan <rajvish@yahoo.com> wrote:
>
> > Most probably you have a network problem. Check your hostname and IP
> address mapping
> >
> >
> >
> >> ________________________________
> >> From: Yongwei Xing <jdxyw2004@gmail.com>
> >> To: common-user@hadoop.apache.org
> >> Sent: Thursday, June 14, 2012 10:15 AM
> >> Subject: Map works well, but Redue failed
> >>
> >> Hi all
> >>
> >> I run a simple sort program, however, I meet such error like below.
> >>
> >> 12/06/15 01:13:17 WARN mapred.JobClient: Error reading task outputServer
> >> returned HTTP response code: 403 for URL:
> >>
> http://192.168.1.106:50060/tasklog?plaintext=true&attemptid=attempt_201206150102_0002_m_000001_1&filter=stdout
> >> 12/06/15 01:13:18 WARN mapred.JobClient: Error reading task outputServer
> >> returned HTTP response code: 403 for URL:
> >>
> http://192.168.1.106:50060/tasklog?plaintext=true&attemptid=attempt_201206150102_0002_m_000001_1&filter=stderr
> >> 12/06/15 01:13:20 INFO mapred.JobClient:  map 50% reduce 0%
> >> 12/06/15 01:13:23 INFO mapred.JobClient:  map 100% reduce 0%
> >> 12/06/15 01:14:19 INFO mapred.JobClient: Task Id :
> >> attempt_201206150102_0002_m_000000_2, Status : FAILED
> >> Too many fetch-failures
> >> 12/06/15 01:14:20 WARN mapred.JobClient: Error reading task outputServer
> >> returned HTTP response code: 403 for URL:
> >>
> http://192.168.1.106:50060/tasklog?plaintext=true&attemptid=attempt_201206150102_0002_m_000000_2&filter=stdout
> >>
> >> Does anyone know what's the reason and how to resolve it?
> >>
> >> Best Regards,
> >>
> >> --
> >> Welcome to my ET Blog http://www.jdxyw.com
> >>
> >>
>



-- 
Welcome to my ET Blog http://www.jdxyw.com

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