Patrick, you will likely also need to apply the same hack to opal_net_get_hostname() in opal/util/net.c
Cheers, Gilles On Thu, Jun 16, 2022 at 7:30 PM Gilles Gouaillardet < gilles.gouaillar...@gmail.com> wrote: > Patrick, > > I am not sure Open MPI can do that out of the box. > > Maybe hacking pmix_net_get_hostname() in > opal/mca/pmix/pmix3x/pmix/src/util/net.c > > can do the trick. > > > Cheers, > > Gilles > > On Thu, Jun 16, 2022 at 4:24 PM Patrick Begou via users < > users@lists.open-mpi.org> wrote: > >> Hi all, >> >> we are facing a serious problem with OpenMPI (4.0.2) that we have >> deployed on a cluster. We do not manage this large cluster and the names >> of the nodes do not agree with Internet standards for protocols: they >> contain a "_" (underscore) character. >> >> So OpenMPI complains about this and do not run. >> >> I've tried to use IP instead of host names in the host file without any >> success. >> >> Is there a known workaround for this as requesting the administrators to >> change the nodes names on this large cluster may be difficult. >> >> Thanks >> >> Patrick >> >> >>
