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From Ted Dunning <>
Subject Re: ClassNotFoundException with pseudo/distributed run of KMeans
Date Thu, 16 Jul 2009 22:23:19 GMT
I recently had these problems as well.  I noticed that these errors were not
such a big deal in maps, but if they occur with a reduce, the job will
eventually fail.  In my case, I noted that these errors came predominantly
from a single node and so I simply stopped using that node.  I think that
the node had less memory than others or may have been otherwise deficient.

I can't find the discussion on the web about this topic that guided me last
time, but I had the impression that this was related to the general 0.19
malaise.  My problem has not recurred since blacklisting tasks on my weak

On Thu, Jul 16, 2009 at 1:04 PM, Grant Ingersoll <>wrote:

> 09/07/16 13:30:06 INFO mapred.JobClient: Task Id :
> attempt_200907160952_0004_m_000000_1, Status : FAILED
> Too many fetch-failures

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