Re: [OMPI users] MPI_Comm_spawn leads to pipe leak and other errors

2019-03-16 Thread Ralph H Castain
FWIW: I just ran a cycle of 10,000 spawns on my Mac without a problem using OMPI master, so I believe this has been resolved. I don’t know if/when the required updates might come into the various release branches. Ralph > On Mar 16, 2019, at 1:13 PM, Thomas Pak wrote: > > Dear Jeff, > > I d

Re: [OMPI users] MPI_Comm_spawn leads to pipe leak and other errors

2019-03-16 Thread Thomas Pak
Dear Jeff, I did find a way to circumvent this issue for my specific application by spawning less frequently. However, I wanted to at least bring attention to this issue for the OpenMPI community, as it can be reproduced with an alarmingly simple program. Perhaps the user's mailing list is not

Re: [OMPI users] MPI_Comm_spawn leads to pipe leak and other errors

2019-03-16 Thread Jeff Hammond
Is there perhaps a different way to solve your problem that doesn’t spawn so much as to hit this issue? I’m not denying there’s an issue here, but in a world of finite human effort and fallible software, sometimes it’s easiest to just avoid the bugs altogether. Jeff On Sat, Mar 16, 2019 at 12:11

Re: [OMPI users] MPI_Comm_spawn leads to pipe leak and other errors

2019-03-16 Thread Thomas Pak
Dear all, Does anyone have any clue on what the problem could be here? This seems to be a persistent problem present in all currently supported OpenMPI releases and indicates that there is a fundamental flaw in how OpenMPI handles dynamic process creation. Best wishes, Thomas Pak From: "