Hi , I have two MPI processes (server and client) launched independently by two different mpiexec command. (mpich-3.0.4, sock-device) 1> mpiexec -disable-auto-cleanup -n 1 ./server 2> mpiexec -disable-auto-cleanup -n 1 ./client The server opens a port and does MPI_Comm_accept. The client gets the port information and does MPI_Comm_connect and hence we get a new intercommunicator. I don't do MPI_Comm_merge. I have installed my own signal handler for SIGUSR1 before even I call MPI_Init ( I guess, this will automatically chain the signal handler).

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signal (SIGUSR1, mysignalhandler);

Now suppose, the 'client' process gets killed ( I forcefully kill the process by signal 9), I thought I would get SIGUSR1 in the process 'server'. However, I don't get any signal in 'server' process. Am I doing something wrong? I have noticed that if I start 4 client processes with single mpiexec command, and one client gets killed, rest of the 3 clients receive SIGUSR1. Does this mean, SIGUSR1 is not forwarded across processes connected using inter-communicator? Thanks, Hirak _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss