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Posted to common-user@hadoop.apache.org by shixing <pa...@gmail.com> on 2009/01/09 04:38:06 UTC

Hangs when reduce

The hadoop is 0.19-trunk checked out 2008-10-10

we use this trunck and after run several days, it will alway hangs several
reducers when copying at 0.0%。

the log is always like this:

2009-01-09 11:19:38,600 INFO org.apache.hadoop.mapred.TaskTracker:
attempt_200901081900_0015_r_000000_3 0.0% reduce > copy >
2009-01-09 11:19:41,331 INFO org.apache.hadoop.mapred.TaskTracker:
org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find
taskTracker/jobcache/job_200901081900_0015/attempt_200901081900_0015_r_000000_3/output/file.out
in any of the configured local directories

I also wonder why it find the reduce output in the local directories? I just
know the mapresult is on local disk.


-- 
Best wishes!
My Friend~