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 >> >>
