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Subject: Re: [OMPI users] mpi_comm_spawn have problems with group communicators
From: Milan Hodoscek (milan_at_[hidden])
Date: 2010-10-04 12:36:56

>>>>> "Ralph" == Ralph Castain <rhc_at_[hidden]> writes:

    Ralph> I'm not sure why the group communicator would make a
    Ralph> difference - the code area in question knows nothing about
    Ralph> the mpi aspects of the job. It looks like you are hitting a
    Ralph> race condition that causes a particular internal recv to
    Ralph> not exist when we subsequently try to cancel it, which
    Ralph> generates that error message. How did you configure OMPI?

Thank you for the reply!

Must be some race problem, but I have no control of it, or do I?

These are the configure options that gentoo compiles openmpi-1.4.2 with:

./configure --prefix=/usr --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu --mandir=/usr/share/man --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc --localstatedir=/var/lib --libdir=/usr/lib64 --sysconfdir=/etc/openmpi --without-xgrid --enable-pretty-print-stacktrace --enable-orterun-prefix-by-default --without-slurm --enable-contrib-no-build=vt --enable-mpi-cxx --disable-io-romio --disable-heterogeneous --without-tm --enable-ipv6