>the tasktracker tried to talk to the the DFS as the "foo" user, not the "bar" 
>user who submitted the job.  

What do you mean by "talk to"?  Which files did it fail to access?  What error 
messages are you getting?

>Should I file a JIRA then?

If you believe it is a bug, please file a JIRA.  I guess it might be a setting 
problem.

Nicholas

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