Did you configure OMPI with --enable-debug? You should do this so that more diagnostic output is available.
You can also add the following to your cmd line to get more info: --debug --debug-daemons --leave-session-attached Something is likely blocking proper launch of the daemons and processes so you aren't getting to the btl's at all. On Mar 19, 2010, at 9:42 AM, uriz.49...@e.unavarra.es wrote: > The processes are running on the remote nodes but they don't give the > response to the origin node. I don't know why. > With the option --mca btl_base_verbose 30, I have the same problems and it > doesn't show any message. > > Thanks > >> On Wed, Mar 17, 2010 at 1:41 PM, Jeff Squyres <jsquy...@cisco.com> wrote: >>> On Mar 17, 2010, at 4:39 AM, <uriz.49...@e.unavarra.es> wrote: >>> >>>> Hi everyone I'm a new Open MPI user and I have just installed Open MPI >>>> in >>>> a 6 nodes cluster with Scientific Linux. When I execute it in local it >>>> works perfectly, but when I try to execute it on the remote nodes with >>>> the >>>> --host option it hangs and gives no message. I think that the problem >>>> could be with the shared libraries but i'm not sure. In my opinion the >>>> problem is not ssh because i can access to the nodes with no password >>> >>> You might want to check that Open MPI processes are actually running on >>> the remote nodes -- check with ps if you see any "orted" or other >>> MPI-related processes (e.g., your processes). >>> >>> Do you have any TCP firewall software running between the nodes? If so, >>> you'll need to disable it (at least for Open MPI jobs). >> >> I also recommend running mpirun with the option --mca btl_base_verbose >> 30 to troubleshoot tcp issues. >> >> In some environments, you need to explicitly tell mpirun what network >> interfaces it can use to reach the hosts. Read the following FAQ >> section for more information: >> >> http://www.open-mpi.org/faq/?category=tcp >> >> Item 7 of the FAQ might be of special interest. >> >> Regards, >> >> _______________________________________________ >> users mailing list >> us...@open-mpi.org >> http://www.open-mpi.org/mailman/listinfo.cgi/users >> > > > _______________________________________________ > users mailing list > us...@open-mpi.org > http://www.open-mpi.org/mailman/listinfo.cgi/users
