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August 2015

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Subject:
From:
"Dhananjai M. Rao" <[log in to unmask]>
Reply To:
Research Computing Support <[log in to unmask]>, Dhananjai M. Rao
Date:
Tue, 25 Aug 2015 08:56:54 -0400
Content-Type:
text/plain
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text/plain (66 lines)
Are there multiple jobs writing to the same directory?

On Tue, 2015-08-25 at 08:53 -0400, Karro, John wrote:
> I really don't think so.  Obviously, I could have a bug I'm unaware
> of.  But that output file should be unique to that call to that
> script.  I really don't see how I could have screwed it up.
> 
> ----------------------------------------------------------------------------------------------
> Dr. John Karro, Associate Professor
> Department of Computer Science and Software Engineering
> Affiliate: Department of Microbiology, Department of Statistics
> Office: Benton 205D, Miami University, Oxford, Ohio
> ----------------------------------------------------------------------------------------------
> 
> On Tue, Aug 25, 2015 at 8:49 AM, Dhananjai M. Rao <[log in to unmask]>
> wrote:
>         Is it possible that there is some other job that is writing to
>         the same
>         file? If you are bulk scheduling jobs, is it possible that you
>         are
>         accidentally scheduling 2 jobs that are writing to the same
>         directory?
>         
>         On Tue, 2015-08-25 at 08:44 -0400, Karro, John wrote:
>         > Can anyone explain to me the following OS errors occurring
>         > sporadically on Redhawk, as returned by my Python code:
>         >
>         >
>         > Traceback (most recent call last):
>         >   File "consensus_seq.py", line 84, in <module>
>         >     main(args.seq,args.elements,args.output,args.fa_output)
>         >   File "consensus_seq.py", line 45, in main
>         >     wp = open(output, "w")
>         > OSError: [Errno 116] Stale NFS file handle:
>         > 'SEEDS1/PHRAIDER/ce10.chrV.s2.f3.consensus.txt'
>         >
>         >
>         > I'm running batches of jobs, and this seems to pop up
>         every-once in a
>         > while and kill my pipeline.  The directory does exist.  And
>         if I rerun
>         > the program (many hours later) it works fine.
>         >
>         > Any idea why this might happen?
>         >
>         >      John
>         >
>         >
>         >
>         >
>         ----------------------------------------------------------------------------------------------
>         >
>         >
>         > Dr. John Karro, Associate Professor
>         > Department of Computer Science and Software Engineering
>         > Affiliate: Department of Microbiology, Department of
>         Statistics
>         > Office: Benton 205D, Miami University, Oxford, Ohio
>         >
>         ----------------------------------------------------------------------------------------------
>         
>         
>         
> 
> 

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