Hi mpich team, I am using MPICH 3.0.4 sock with dynamic connection (accept/connect). I am facing issues with the following scenario, when there is a race condition in MPI_Comm_connect. Here is the case 1> Server opens a port, writes the port info in a file, calls MPI_Comm_accept 2> Client1 & Client2 reads the port information from file and each client calls MPI_Comm_connect 3> Server accepts one client, disconnects, closes the port, exit 4> One of the client successfully connects, disconnects, exit 5> The other client hangs in MPI_Comm_connect If you do the following steps, you can reproduce the issue 1> Please set compiler and installation path of MPICH in makefile 2> make : compiles 3> make run_bad I have noticed that in case client calls MPI_Comm_connect after the port is closed, the connect calls successfully terminates with error (make run_good). Please let me know whether it is a bug or not. Please also let me know if the connect call can be configured with a timeout or not. Thanks, Hirak _______________________________________________ discuss mailing list [email protected] To manage subscription options or unsubscribe: https://lists.mpich.org/mailman/listinfo/discuss