There is a known bug in the 1.8.1 release whereby daemons failing to start on a remote node will cause a silent failure. This has been fixed for the upcoming 1.8.2 release, but you might want to use one of the nightly 1.8.2 snapshots in the interim.
Most likely causes: * not finding the required libraries on the remote node because the default PATH and LD_LIBRARY_PATH aren't setup correctly * firewall preventing TCP connections between the machines Ralph On May 9, 2014, at 5:30 AM, Wijnberg, Tom <t...@metrohm-applikon.com> wrote: > Hi, > > I have encountered a problem with openmpi I can't seem to be able to > diagnose or find precedence in in the mailing-list. I have two pc's with > a fresh install of Arch linux and openmpi 1.8.1. One is a dedicated PC > and the other is a virtualbox installation. The virtualbox install is > the master and I'm able to use mpirun without a problem (compiled a > small program that prints to stdout). In and output are as follows: > >> $ mpirun -n 4 -hostfile mpiHosts myprogram >> hello MPI user: from process = 1 on machine=vArch, of NCPU=4 processes >> hello MPI user: from process = 0 on machine=vArch, of NCPU=4 processes >> hello MPI user: from process = 2 on machine=vArch, of NCPU=4 processes >> hello MPI user: from process = 3 on machine=vArch, of NCPU=4 > processes > > Running programs on a single machine is not a problem. Also I'm able to > log into both machines using ssh without the need for a password so > communication between the machines should be oke. However when I add the > second host to the hostfile the I get no more feedback. What I mean with > this is that I get the following. > >> $ echo "10.5.10.224 slots=4" >> mpiHosts $ mpirun -n 8 -hostfile >> $ mpirun -n 4 -hostfile mpiHosts myprogram >> > > No output is returned. I'm not sure if this is intended behavior but it > seems incorrect to me. Can anyone provide me with some insight as to why > I'm observing this en how I can diagnose the problem. > > Regards, > TWij > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
