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.dod...@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 <rajv...@yahoo.com> wrote: > > > Most probably you have a network problem. Check your hostname and IP > address mapping > > > > > > > >> ________________________________ > >> From: Yongwei Xing <jdxyw2...@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
