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From Greg Roelofs <roel...@yahoo-inc.com>
Subject Re: File Not found Bug. Hadoop Streaming
Date Fri, 03 Dec 2010 22:00:46 GMT
Vivek Krishna wrote:

> The Error:
> *java.io.IOException: Cannot run program "mapper.py": error=2, No such file
> or directory*
> *

That's the sort of error you get when the script interpreter doesn't exist.
Have you verified the #! path and/or whether Python is even installed on
the tasktracker (child/slave/whatever) nodes?  If you have the ability to
log onto one of the nodes directly, try your command-line (non-Hadoop) test
there and make sure it works OK.

I also vaguely recall hearing about a bug in which executable perms were
not restored on grid nodes in some circumstances, but I _thought_ that
applied only to an internal y20 development version.  In any case, it was
several months ago, which probably means it got fixed right away.


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