On Tue, Dec 1, 2009 at 18:03, Ralph Castain <rhc@open-mpi.org> wrote:

You may want to check your limits as defined by the shell/system. I can also run this for as long as I'm willing to let it run, so something else appears to be going on.

Is that with 1.3.3? I found that with 1.3.4 I can run the example much longer until I hit this error message:

[master] (31996) forking processes
[mujo:14273] opal_os_dirpath_create: Error: Unable to create the sub-directory (/tmp/.private/nbock/openmpi-sessions-nbock@mujo_0/13386/31998) of (/tmp/.private/nbock/openmpi-sessions-nbock@mujo_0/13386/31998/0), mkdir failed [1]
[mujo:14273] [[13386,31998],0] ORTE_ERROR_LOG: Error in file util/session_dir.c at line 101
[mujo:14273] [[13386,31998],0] ORTE_ERROR_LOG: Error in file util/session_dir.c at line 425
[mujo:14273] [[13386,31998],0] ORTE_ERROR_LOG: Error in file base/ess_base_std_app.c at line 132
--------------------------------------------------------------------------
It looks like orte_init failed for some reason; your parallel process is
likely to abort. There are many reasons that a parallel process can
fail during orte_init; some of which are due to configuration or
environment problems. This failure appears to be an internal failure;
here's some additional information (which may only be relevant to an
Open MPI developer):

orte_session_dir failed
--> Returned value Error (-1) instead of ORTE_SUCCESS

On Dec 1, 2009, at 4:38 PM, Nicolas Bock wrote:

On Tue, Dec 1, 2009 at 16:28, Abhishek Kulkarni <abbyzcool@gmail.com> wrote:

On Tue, Dec 1, 2009 at 6:15 PM, Nicolas Bock <nicolasbock@gmail.com> wrote:
> After reading Anthony's question again, I am not sure now that we are having
> the same problem, but we might. In any case, the attached example programs
> trigger the issue of running out of pipes. I don't see how orted could, even
> if it was reused. There is only a very limited number of processes running
> at any given time. Once slave terminates, how would it still have open
> pipes? Shouldn't the total number of open files, or pipes, be very limited
> in this situation? And yet, after maybe 20 or so iterations in master.c,
> orted complains about running out of pipes.
>
> nick
>

What version of OMPI are you trying it with? I can easily run it up to more
than 200 iterations.

openmpi-1.3.3

Also, how many nodes are you running this on?

This is on one node with 4 cores. I am using

mpirun -np 1

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