It looks like v3.0 is clean - probably best to update when it is released. We know there are issues with dynamics in the 2.x series, and put a special effort to eliminate them in 3.x.
> On Apr 28, 2017, at 8:48 AM, Austin Herrema <aherr...@iastate.edu> wrote: > > OMPI version 2.1.0. Should have clarified that initially, sorry. Running on > Ubuntu 12.04.5. > > On Fri, Apr 28, 2017 at 10:29 AM, r...@open-mpi.org > <mailto:r...@open-mpi.org> <r...@open-mpi.org <mailto:r...@open-mpi.org>> > wrote: > What version of OMPI are you using? > >> On Apr 28, 2017, at 8:26 AM, Austin Herrema <aherr...@iastate.edu >> <mailto:aherr...@iastate.edu>> wrote: >> >> Hello all, >> >> I am using mpi4py in an optimization code that iteratively spawns an MPI >> analysis code (fortran-based) via "MPI.COMM_SELF.Spawn" (I gather that this >> is not an ideal use for comm spawn but I don't have too many other options >> at this juncture). I am calling "child_comm.Disconnect()" on the parent side >> and "call MPI_COMM_DISCONNECT(parent, ier)" on the child side. >> >> After a dozen or so iterations, it would appear I am running up against the >> system limit for number of open pipes: >> >> [affogato:05553] [[63653,0],0] ORTE_ERROR_LOG: The system limit on number of >> pipes a process can open was reached in file odls_default_module.c at line >> 689 >> [affogato:05553] [[63653,0],0] usock_peer_send_blocking: send() to socket >> 998 failed: Broken pipe (32) >> [affogato:05553] [[63653,0],0] ORTE_ERROR_LOG: Unreachable in file >> oob_usock_connection.c at line 316 >> >> From this Stackoverflow post >> <http://stackoverflow.com/questions/20698712/mpi4py-close-mpi-spawn> I have >> surmised that the opened pipes remain open on mpiexec despite no longer >> being used. I know I can increase system limits, but this will only get me >> so far as I intend to perform hundreds if not thousands of iterations. Is >> there a way to dynamically close the unused pipes on either the python or >> fortran side? Also, I've seen the "mca parameter" mentioned in regards to >> this topic. I don't fully understand what that is, but will setting it have >> an effect on this issue? >> >> Thank you, >> Austin >> >> -- >> Austin Herrema >> PhD Student | Graduate Research Assistant | Iowa State University >> Wind Energy Science, Engineering, and Policy | Mechanical Engineering >> _______________________________________________ >> users mailing list >> users@lists.open-mpi.org <mailto:users@lists.open-mpi.org> >> https://rfd.newmexicoconsortium.org/mailman/listinfo/users >> <https://rfd.newmexicoconsortium.org/mailman/listinfo/users> > > _______________________________________________ > users mailing list > users@lists.open-mpi.org <mailto:users@lists.open-mpi.org> > https://rfd.newmexicoconsortium.org/mailman/listinfo/users > <https://rfd.newmexicoconsortium.org/mailman/listinfo/users> > > > > -- > Austin Herrema > PhD Student | Graduate Research Assistant | Iowa State University > Wind Energy Science, Engineering, and Policy | Mechanical Engineering > _______________________________________________ > users mailing list > users@lists.open-mpi.org > https://rfd.newmexicoconsortium.org/mailman/listinfo/users
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