On Aug 18, 2009, at 8:39 AM, Federico Golfrè Andreasi wrote:
> I think I've solved my problem:
> in the previous code the arguments of the MPI_Comm_spawn_multiple
> where filled only by the "root" process not by all the process in
> the group. Now all the ranks have all that information and the spawn
> is done correctly.
> But I read on http://www.mpi-forum.org/docs/mpi21-report/node203.htm
> that those information are significant only at root.
You are exactly right -- this is a legitimate bug! I've fixed our
development trunk in https://svn.open-mpi.org/trac/ompi/timeline and
have filed a CMR to get this fix into 1.3.4.
Thanks for the report!