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Subject: [OMPI users] FRQ: Warn if components specified but missing
From: Bernhard Hermann (hermann_at_[hidden])
Date: 2008-08-04 09:23:36


We would like to request a warning/error message to be printed whenever
a component (like "openib") is specified, but not actually loaded.

Our case: Running a job via "tcp" over IB went OK, trying to use
"openib" failed. It turned out that while compiling the "openib" module
wasn't made (missing path), so OpenMPI croaked when trying to access it.

This was the error that was of little help to us in tracing the problem:
Process 0.1.7 is unable to reach 0.1.0 for MPI communication.
If you specified the use of a BTL component, you may have
forgotten a component (such as "self") in the list of
usable components.
It looks like MPI_INIT failed for some reason; your parallel process is
likely to abort. There are many reasons that a parallel process can
fail during MPI_INIT; some of which are due to configuration or environment
problems. This failure appears to be an internal failure; here's some
additional information (which may only be relevant to an Open MPI

  PML add procs failed
  --> Returned "Unreachable" (-12) instead of "Success" (0)
*** An error occurred in MPI_Init
*** before MPI was initialized
*** MPI_ERRORS_ARE_FATAL (goodbye)

Unfortunately we can't provide a patch and would be glad if someone
could implement and include this.

Thanks for your attention,
best regards,
Bernhard HERMANN informationstechnologie GmbH.

Mariahilfer Str. 61/1/10
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