[mpich-discuss] MPI_Comm_Connect bug?

[Darius Buntinas]

What version of MPICH2 are you using?  What command-line parameters did you use for mpiexec?

Normally if one process exits without calling MPI_Finalize, the process manager will abort all processes.  There is an option for (the Hydra version of) mpiexec that disables this behavior.

If you want all processes to abort, you should call MPI_Abort(MPI_COMM_WORLD, errorcode) to abort all processes.

-d

On Oct 14, 2010, at 1:11 PM, Biddiscombe, John A. wrote:

> To try to catch a problem that occurs when MPI_Comm_connect fails, I wrapped the call with an error handler with the aim of gracefully exiting.
> 
> rank 0, detects an error, aborts and displays the message. But other ranks hang waiting for something to happen. I think that when rank 0 aborts, it should first signal the other ranks to also abort. 
> 
> Am I doing it wrong, or is this a bug?
> 
> thanks. snippet below
> 
> JB
> 
>  MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_RETURN);
>  int error_code = MPI_Comm_connect(this->DsmMasterHostName, MPI_INFO_NULL, 0, this->Comm, &this->InterComm);
>  if (error_code== MPI_SUCCESS) {
>    H5FDdsmDebug("Id = " << this->Id << " MPI_Comm_connect returned SUCCESS");
>    isConnected = H5FD_DSM_SUCCESS;
>  } else {
>   char error_string[1024];
>   int length_of_error_string;
>   MPI_Error_string(error_code, error_string, &length_of_error_string);
>   H5FDdsmError("\nMPI_Comm_connect failed with error : \n" << error_string << "\n\n");
>  }
>  // reset to MPI_ERRORS_ARE_FATAL for normal debug purposes
>  MPI_Errhandler_set(MPI_COMM_WORLD, MPI_ERRORS_ARE_FATAL);
> 
> 
> -- 
> John Biddiscombe,                            email:biddisco @ cscs.ch
> http://www.cscs.ch/
> CSCS, Swiss National Supercomputing Centre  | Tel:  +41 (91) 610.82.07
> Via Cantonale, 6928 Manno, Switzerland      | Fax:  +41 (91) 610.82.82
> 
> 
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