Guillaume -- There is an MPI Standard document that you can obtain from mpi-forum.org. Open MPI v4.x adheres to MPI version 3.1 (the latest version of the MPI standard is v4.0, but that is unrelated to Open MPI's version number).
Frankly, Open MPI's support of the dynamic API functionality (connect/accept/etc.) has always been a bit shaky; they have been tested to work in very, very specific conditions, and not made super robust to work in many different / generalized cases. Is there a chance you can orient your app to not use the MPI dynamic APIs? -- Jeff Squyres jsquy...@cisco.com ________________________________________ From: users <users-boun...@lists.open-mpi.org> on behalf of Gilles Gouaillardet via users <users@lists.open-mpi.org> Sent: Friday, June 24, 2022 5:56 AM To: Open MPI Users Cc: Gilles Gouaillardet Subject: Re: [OMPI users] Intercommunicator issue (any standard about communicator?) Guillaume, what do you mean by (the intercommunicators are all negative"? Cheers, Gilles On Fri, Jun 24, 2022 at 4:23 PM Guillaume De Nayer via users <users@lists.open-mpi.org<mailto:users@lists.open-mpi.org>> wrote: Hi, I am new on this list. Let me introduce myself shortly: I am a researcher in fluid mechanics. In this context I am using softwares related on MPI. I am facing a problem: - 3 programs forms a computational framework. Soft1 is a coupling program, i.e., it opens an MPI port at the beginning. Soft2 and Soft3 are clients, which connect to the coupling program using MPI_Comm_connect. - After the start and the connections of Soft2 and Soft3 with Soft1, it hangs. I started to debug this issue and as usual I found another issue (or perhaps it is not an issue): - The intercommunicators I get between Soft1-Soft2 and Soft1-Soft3 are all negative (running on CentOS 7 with infiniband Mellanox OFED driver). - Is there some standard about communicator? I don't find anything about this topic. - What is a valid communicator, intercommunicator? thx a lot Regards Guillaume
