[Swift-user] Deep recursion on subroutine "main::stageout" at /home/ketan/work/worker.pl line 1349

[Mihael Hategan]

Good point. It probably should be there.

I first saw it in Globus somewhere. The rationale for it was that there
are applications that, given a stdin, may hang waiting for user input
(which is useless when the app is running on some remote cluster),
whereas a closed stdin might determine them to go ahead and do whatever
it is that they do without user input.

I'm assuming that Globus folks have actually seen this behavior before
putting the respective piece of code in there.

Mihael

On Wed, 2012-05-23 at 09:59 -0400, Ketan Maheshwari wrote:
> Just a note that this behavior (closed stdin) is not seen in the local
> execution provider.
> 
> On Tue, May 22, 2012 at 11:00 PM, Michael Wilde <wilde at mcs.anl.gov>
> wrote:
>         Thanks, Mihael - strace solved the mystery. Turns out that
>         when Swift runs an app, it closes stdin unless you specify
>         stdin= in the app command line body.
>         
>         This confused the MARS app, likely around the logic where it
>         was reading the license file. (It seemed to be checking if
>         stdin was a tty?) So it was failing even before it tried to
>         open the license file.
>         
>         The remedy was to specify stdin="/dev/null" on the app cmd
>         body.
>         
>         - Mike
>         
>         
>         ----- Original Message -----
>         
>         > From: "Mihael Hategan" <hategan at mcs.anl.gov>
>         > To: "Ketan Maheshwari" <ketancmaheshwari at gmail.com>
>         > Cc: "Michael Wilde" <wilde at mcs.anl.gov>, "Swift User"
>         <swift-user at ci.uchicago.edu>
>         
>         > Sent: Tuesday, May 22, 2012 8:37:56 PM
>         > Subject: Re: [Swift-user] Deep recursion on subroutine
>         "main::stageout" at /home/ketan/work/worker.pl line 1349
>         
>         > On Tue, 2012-05-22 at 20:54 -0400, Ketan Maheshwari wrote:
>         > > Mihael,
>         > >
>         > >
>         > > As far as I know there is no environment setup required
>         before
>         > > running
>         > > mars.
>         > >
>         >
>         > There's an easy way to check. Type env after you verified
>         that you
>         > were
>         > able to run the app and paste the output here.
>         >
>         > Also, you can strace the app from the wrapper and then we
>         can see
>         > where
>         > it's looking for that file.
>         >
>         > Mihael
>         
>         
>         --
>         Michael Wilde
>         Computation Institute, University of Chicago
>         Mathematics and Computer Science Division
>         Argonne National Laboratory
>         
>         
> 
> 
> 
> 
> -- 
> Ketan
> 
>