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Back to Troubleshooting Guide
MPI: ssh: connect to host <hname> port 22: No route to host
Diagnosis
There is a problem in the establishing of an ssh connection to one of the hosts where the MPI job must run.
Note that the approved technique for submitting MPI jobs is via the mpi-start utility. If you use this approach, mpi-start should detect the best way of running MPI jobs at the site. Please consult the MPI user guide for details. Older documentation may still be found here and here.