Which OMPI version?
On Apr 22, 2010, at 12:04 PM, Jon Hitchcock wrote:
> If a user connects to a cluster using SSH, starts an MPI program which
> contains an infinite loop, and then breaks the SSH connection, the processes
> running the MPI program continue to run on the compute nodes and they have to
> be killed manually.
>
> To investigate this, I found that if the user types Control-C (or sends
> SIGINT to mpirun), mpirun says "killing job...", and on each compute node the
> orted process and the process running the MPI program are killed.
>
> However if SIGHUP is sent to mpirun, it says "Hangup" and exits, and on each
> compute node the orted process is killed but the process running the MPI
> program continues to run.
>
> This is with Rocks 5.3 and Open MPI. There is no batch scheduler. The MPI
> program is just:
>
> #include "mpi.h"
> main(int argc, char **argv) {
> MPI_Init(&argc, &argv);
> while (1) ;
> MPI_Finalize();
> }
>
> I have two questions. Is this the behaviour I should expect? Is there an
> easy way to kill the processes?
>
> Thanks, Jon Hitchcock
>
>
>
>
>
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