[petsc-users] Problem with mpi

[Matthew Knepley]

You have an invalid communicator. I suspect you are overwriting memory
somewhere, since it works in one place but has corruption in another. For
this kind of error, the best thing to do is use valgrind to find it.

   Matt

On Fri, Oct 29, 2010 at 10:16 AM, TAY Wee Beng <zonexo at gmail.com> wrote:

> Hi,
>
> I have a mpi code which works fine in my previous clusters.
>
> However, there's mpi problem when I use it in the new clusters, which use
> openmpi. I wonder if there's a relation.
>
> The error is:
>
> [n12-70:14429] *** An error occurred in MPI_comm_size
> [n12-70:14429] *** on communicator MPI_COMM_WORLD
> [n12-70:14429] *** MPI_ERR_COMM: invalid communicator
> [n12-70:14429] *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
> 2.48user 0.45system 0:03.99elapsed 73%CPU (0avgtext+0avgdata
> 2871936maxresident)k
> 0inputs+0outputs (0major+185587minor)pagefaults 0swaps
> --------------------------------------------------------------------------
> mpiexec has exited due to process rank 3 with PID 14425 on
> node n12-70 exiting without calling "finalize". This may
> have caused other processes in the application to be
> terminated by signals sent by mpiexec (as reported here).
> --------------------------------------------------------------------------
> [n12-70:14421] 3 more processes have sent help message help-mpi-errors.txt
> / mpi_errors_are_fatal
> [n12-70:14421] Set MCA parameter "orte_base_help_aggregate" to 0 to see all
> help / error messages
>
> I am not sure what other information you will need. I will provide more
> information if required. I tried running on 1, 4 and 8 processors but all
> can't work.
>
> --
> Yours sincerely,
>
> TAY Wee Beng
>
>


-- 
What most experimenters take for granted before they begin their experiments
is infinitely more interesting than any results to which their experiments
lead.
-- Norbert Wiener
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