Add "--mca pml cm" to your cmd line
On Jul 31, 2020, at 9:54 PM, Supun Kamburugamuve via users <users@lists.open-mpi.org <mailto:users@lists.open-mpi.org> > wrote: Hi all, I'm trying to setup OpenMPI on a cluster with the Omni-Path network. When I try the following command it gives an error. mpirun -n 2 --hostfile nodes --mca mtl psm2 ./osu_bw # OSU MPI Bandwidth Test v5.6.3 # Size Bandwidth (MB/s) -------------------------------------------------------------------------- WARNING: Open MPI failed to TCP connect to a peer MPI process. This should not happen. Your Open MPI job may now hang or fail. Local host: t-001 PID: 63725 Message: connect() to IP:1024 failed Error: Operation now in progress (115) -------------------------------------------------------------------------- I don't want it to use the network it tries to connect to. Any pointers to solve this? Best, -- Supun Kamburugamuve, PhD Digital Science Center, Indiana University Member, Apache Software Foundation; http://www.apache.org <http://www.apache.org/> E-mail: supun@apache.o <mailto:supu...@gmail.com> rg; Mobile: +1 812 219 2563
