Just to be clear: you are starting the single process using “srun -n 1 ./app”, and the app calls MPI_Comm_spawn?
I’m not sure that’s really supported…I think there might be something in Slurm behind that call, but I have no idea if it really works. > On Sep 20, 2015, at 12:57 PM, Lev Givon <l...@columbia.edu> wrote: > > While debugging a problem that is causing emission of a non-fatal OpenMPI > error > message to stderr, the error message is followed by a line similar to the > following (I have help message aggregation turned on): > > [myhost:10008] 17 more processes have sent help message some_file.txt / blah > blah failed > > The job that I am running is started as a single process (via SLURM using PMI) > that spawns 2 processes via MPI_Spawn; the number of processes reported in the > above line, however, is much larger than 2. Why would the number of processes > reporting an error be so big? When I examine the MPI processes in real time > as they > run (e.g., via top), there never appear to be that many processes running. > > I'm using OpenMPI 1.10.0 built on Ubuntu 14.04.3; as indicated by ompi_info, I > don't have multiple MPI threads enabled: > > posix (MPI_THREAD_MULTIPLE: no, OPAL support: yes, OMPI progress: no, ORTE > progress: yes, Event lib: yes) > -- > Lev Givon > Bionet Group | Neurokernel Project > http://www.columbia.edu/~lev/ > http://lebedov.github.io/ > http://neurokernel.github.io/ > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2015/09/27634.php
