[netCDF #UPZ-187627]: netcdf-4.1.3: BUG: Invalid usage of MPI_Comm_f2c in nc_create_par

Hi Nicolai,

> linking against openmpi-1.4.3, the parallel testsuite fails with this:
> --------------------------------------------------------------------------
> [tornado1:31832] *** An error occurred in MPI_Comm_dup
> [tornado1:31832] *** on communicator MPI_COMM_WORLD
> [tornado1:31832] *** MPI_ERR_COMM: invalid communicator
> [tornado1:31832] *** MPI_ERRORS_ARE_FATAL (your MPI job will now abort)
> --------------------------------------------------------------------------
> mpiexec has exited due to process rank 0 with PID 31832 on
> node tornado1 exiting without calling "finalize". This may
> have caused other processes in the application to be
> terminated by signals sent by mpiexec (as reported here).
> --------------------------------------------------------------------------
> 
> See attached testcase.
> 
> The reason is that you're calling MPI_Comm_f2c on C MPI communicators in
> nc_create_par. MPI_Comm_f2c has a meaning only on Fortran MPI
> communicators.
> 
> Fix is attached. Testsuite and testcase complete with this fix applied.

Thanks very much for diagnosing the problem and providing a fix!  We will 
include your
fix in the next release, after evaluating it.

--Russ

Russ Rew                                         UCAR Unidata Program
address@hidden                      http://www.unidata.ucar.edu



Ticket Details
===================
Ticket ID: UPZ-187627
Department: Support netCDF
Priority: Urgent
Status: Closed