Hi Mathieu, I created an MPI Forum ticket for this: https://svn.mpi-forum.org/trac/mpi-forum-web/ticket/365 In terms of what is guaranteed by the standard, the behavior is undefined. In terms of that MPICH will do, I am not sure, although my guess is that current MPICH will be unable to continue working after such a failure. You may need to do some testing or read the code to find out. Cheers, ~Jim. On 3/4/13 7:56 AM, Matthieu Dorier wrote:
Hi,
I'm connecting two MPI applications A and B using MPI_Comm_accept in A and MPI_Comm_connect in B. I would like to know a bit more about the behavior in case one application stops (say B): will a communication attempt (e.g. MPI_Send) from a process from A to a process from B crash? return an error? block? Is there a way for application A to notice that B has stopped in order to avoid communicating with it?
Thanks.
PS: by the way for whom is involved in the MPI forum, an MPI_Comm_iaccept in the MPI3 standard would have been useful. Something to keep in mind for the next version maybe ;)
Matthieu Dorier PhD student at ENS Cachan Brittany and IRISA http://people.irisa.fr/Matthieu.Dorier
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