ssh: Could not resolve hostname test-mpi-trainjob-ppqcj-launcher-0-0.test-mpi-trainjob-ppqcj: Name or service not known
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ORTE was unable to reliably start one or more daemons.
This usually is caused by:

* not finding the required libraries and/or binaries on
  one or more nodes. Please check your PATH and LD_LIBRARY_PATH
  settings, or configure OMPI with --enable-orterun-prefix-by-default

* lack of authority to execute on one or more specified nodes.
  Please verify your allocation and authorities.

* the inability to write startup files into /tmp (--tmpdir/orte_tmpdir_base).
  Please check with your sys admin to determine the correct location to use.

*  compilation of the orted with dynamic libraries when static are required
  (e.g., on Cray). Please check your configure cmd line and consider using
  one of the contrib/platform definitions for your system type.

* an inability to create a connection back to mpirun due to a
  lack of common network interfaces and/or no route found between
  them. Please check network connectivity (including firewalls
  and network routing requirements).
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ORTE does not know how to route a message to the specified daemon
located on the indicated node:

  my node:   test-mpi-trainjob-ppqcj-launcher-0-0
  target node:  test-mpi-trainjob-ppqcj-node-0-0.test-mpi-trainjob-ppqcj

This is usually an internal programming error that should be
reported to the developers. In the meantime, a workaround may
be to set the MCA param routed=direct on the command line or
in your environment. We apologize for the problem.
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