[mpich-discuss] weird behavior with mpiexe (3.0.4)

[Edscott Wilson]

2013/5/29 Jeff Hammond <jhammond at alcf.anl.gov>

>
> >
> >
> > Wouldn't a message such as "`pwd` directory does not exist on node
> velascoj"
> > be more illustrative?
>
> Yes.  However, the set of improper uses of MPI that could generate
> helpful error messages is uncountable.  Do you not think it is a good
> use of finite developer effort to implement an infinitesimal fraction
> of  such warnings?  There has to be a minimum requirement placed upon
> the user.  I personally think that it should include running in a
> directory that actually exists.
>

Certainly! But then again, some developer must have thought it a good idea,
since under different circumstances, I get:

/bin/bash -c  mpiexec -n 1 -hosts tauro,velascoj gmandel
[proxy:0:0 at tauro] launch_procs (./pm/pmiserv/pmip_cb.c:648): unable to
change wdir to /tmp/edscott/mnt/tauro-home/GIT/gmandel (No such file or
directory)
[proxy:0:0 at tauro] HYD_pmcd_pmip_control_cmd_cb
(./pm/pmiserv/pmip_cb.c:893): launch_procs returned error
[proxy:0:0 at tauro] HYDT_dmxu_poll_wait_for_event
(./tools/demux/demux_poll.c:77): callback returned error status
[proxy:0:0 at tauro] main (./pm/pmiserv/pmip.c:206): demux engine error
waiting for event
[mpiexec at velascoj] control_cb (./pm/pmiserv/pmiserv_cb.c:202): assert
(!closed) failed
[mpiexec at velascoj] HYDT_dmxu_poll_wait_for_event
(./tools/demux/demux_poll.c:77): callback returned error status
[mpiexec at velascoj] HYD_pmci_wait_for_completion
(./pm/pmiserv/pmiserv_pmci.c:197): error waiting for event
[mpiexec at velascoj] main (./ui/mpich/mpiexec.c:331): process manager error
waiting for completion

Which is inconsistent with the previous behavior. Anyways, its no big deal.

BTW, would you happen to know why a process which is started with
MPI_Comm_spawn will go into what seems like an active wait after
MPI_Comm_disconnect and MPI_Finalize has been called? These spawned
processed will hog up CPU until the parent process exits. Curious enough,
this behavior is not mirrored in openmpi.

Edscott



-------------------------------
Dr. Edscott Wilson Garcia
Applied Mathematics and Computing
Mexican Petroleum Institute
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