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From "Albert Chern" <albert.ch...@gmail.com>
Subject Re: RE: Classes Not Loading Correctly in MapRed 0.7
Date Tue, 17 Oct 2006 20:37:34 GMT
Hi Mahadev,

Thanks for the heads up.  Do you think you guys could also take a look
at this for the next point release:

https://issues.apache.org/jira/browse/HADOOP-599

It's just a simple fix, but then I wouldn't have to patch the release each time.

On 10/17/06, Mahadev Konar <mahadev@yahoo-inc.com> wrote:
> Hi Albert,
>    There has been a critical bug in 0.7 release. The bug and the patch are
> avalaible at https://issues.apache.org/jira/browse/HADOOP-607. There should
> be a release soon fixing this problem.
>
> Regards
> Mahadev
>
> > -----Original Message-----
> > From: Albert Chern [mailto:albert.chern@gmail.com]
> > Sent: Thursday, October 12, 2006 7:44 PM
> > To: hadoop-user@lucene.apache.org
> > Subject: Classes Not Loading Correctly in MapRed 0.7
> >
> > Hello,
> >
> > After upgrading from 0.6 to 0.7, we have experienced a strange error
> > with MapReduce jobs.  Jobs that ran perfectly before now seem to have
> > trouble finding the classes from our code.  The stack trace is long,
> > but the errors happen in MapTask.run() when it tries to get the map
> > output key class from the JobConf, which is probably the first time
> > any of our classes are loaded.  Then it fails with a
> > ClassNotFoundException.
> >
> > The strange thing is, the error does not occur on all of the machines
> > in the cluster.  As far as we can tell, the Hadoop installation and
> > configuration are the same across the machines.  Downgrading to 0.6
> > fixes the problem.  Has anyone experienced something similar, or have
> > any idea what could be causing this problem?  Something incorrectly
> > configured, maybe?
> >
> > Thanks,
> > Albert
>
>
>

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