[Pkg-openmpi-maintainers] Ugly error messages when using openmpi

Manuel Prinz debian at pinguinkiste.de
Thu Nov 8 12:10:11 UTC 2007


Hi Ondrej!

Am Donnerstag, den 08.11.2007, 12:38 +0100 schrieb Ondrej Certik:
> [fuji:06162] mca: base: component_find: unable to open osc pt2pt: file
> not found (ignored)
> libibverbs: Fatal: couldn't read uverbs ABI version.
> --------------------------------------------------------------------------
> [0,0,0]: OpenIB on host fuji was unable to find any HCAs.
> Another transport will be used instead, although this may result in
> lower performance.
> --------------------------------------------------------------------------
> [...]
> I am currently investigating, if the problem is in petsc,
> python-petsc4py or openmpi, but I suspect openmpi. Did you ever see
> these errors before? What to do about it?

These are OpenMPI "problems". OpenMPI uses InfiniBand (libibverbs) as
transport, if it's not available, it issues this warning and falls back
to TCP. We know about this and had a discussion about it which you can
find in http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=439730.

The current solution is to disable InfiniBand as documented in
README.Debian.

I'm sorry that the current solution is quite confusing for people new to
OpenMPI. But we decided to leave it this way since disabling it by
default would "break" InfiniBand, while having the message does not
affect the functionality of the package at all.

> When those issues are resolved, the new package will be uploaded in unstable.

Your packages are probably fine.

Best regards
Manuel
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