Patrick, Does “no network is available” means the lo interface (localhost 127.0.0.1) is not even available ?
Cheers, Gilles On Monday, January 28, 2019, Patrick Bégou < patrick.be...@legi.grenoble-inp.fr> wrote: > Hi, > > I fall in a strange problem with OpenMPI 3.1 installed on a CentOS7 > laptop. If no network is available I cannot launch a local mpi job on the > laptop: > > bash-4.2$ mpirun -np 4 hostname > -------------------------------------------------------------------------- > No network interfaces were found for out-of-band communications. We require > at least one available network for out-of-band messaging. > -------------------------------------------------------------------------- > > OpenMPI is built localy with > > Open MPI: 3.1.3rc1 > Open MPI repo revision: v3.1.2-78-gc8e9819 > Configure command line: '--prefix=/opt/GCC73/openmpi31x' > '--enable-mpirun-prefix-by-default' > '--disable-dlopen' '--enable-mca-no-build=openib' > '--without-verbs' '--enable-mpi-cxx' > '--without-slurm' '--enable-mpi-thread-multiple' > > I've tested some btl setup found with google but none solve the problem. > bash-4.2$ mpirun -np 4 -mca btl ^tcp hostname > > or > > bash-4.2$ mpirun -np 4 -mca btl vader,self hostname > > Sarting a wifi connection (when it is available): > > bash-4.2$ mpirun -np 4 hostname > localhost.localdomain > localhost.localdomain > localhost.localdomain > localhost.localdomain > > Any suggestion is welcome > > Patrick >
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