hydra: ssh is used as a launcher on a single node

[orcunyildiz]

I'm running mpich on a single node on the LCRC Swing cluster, but the launcher still picks up the ssh instead of fork. Please ignore the OpenSSL error, which is due to mismatch in OpenSSL versions between my Spack environment and Swing.

oyildiz@gpu6: $ mpiexec -n 12 ./lmp -in ./in.relax
OpenSSL version mismatch. Built against 30000020, you have 30100030
[mpiexec@gpu6] ui_cmd_cb (mpiexec/pmiserv_pmci.c:51): Launch proxy failed.
[mpiexec@gpu6] HYDT_dmxu_poll_wait_for_event (lib/tools/demux/demux_poll.c:76): callback returned error status
[mpiexec@gpu6] HYD_pmci_wait_for_completion (mpiexec/pmiserv_pmci.c:181): error waiting for event
[mpiexec@gpu6] main (mpiexec/mpiexec.c:252): process manager error waiting for completion

Here is the launcher details from the verbose mode output:

[mpiexec@gpu6] Launch arguments: /bin/ssh -x gpu6.lcrc.anl.gov "/lcrc/project/PEDAL/oyildiz/software/spack/var/spack/environments/accelerate-spack-env-mpi-cuda/.spack-env/view/bin/hydra_pmi_proxy" --control-port gpu6:44647 --debug --rmk pbs --launcher ssh --demux poll --pgid 0 --retries 10 --usize -2 --pmi-port 0 --gpus-per-proc -2 --gpu-subdevs-per-proc -2 --proxy-id 0