Hello,

I have been having some problems with connect and disconnect between two processes. The processes seem to be indefinitely blocking at Connect/Accept stage or at Disconnect stage. For example

Process A
{
    MPI_Open_port(...);
    MPI_Publish_name(...);
    MPI_Comm_accept(... &b_comm);  // -----> (1)
    // Do something1
    MPI_Comm_disconnect(&b_comm);  // ------> (2)
    // Do something2

}

Process B
{
    MPI_Lookup_name(...);
    MPI_Comm_connect(... &a_comm); // -----> (1)
    // Do something1
    MPI_Comm_disconnect(&a_comm); // ------> (2)
    // Do something2
}

In the above scenario, in a perfect case where A reaches (1) without any problems, *sometimes* B blocks at its (1) indefinitely. All arguments passed to both the functions are perfect.
Again, *sometimes* one of them block infinitely at (2) while the other goes on to do the something2. This could only be a problem at the application level only if the one that blocks indefinitely is always the same but it is not so. Sometimes A blocks and B is busy doing something2 or A is busy doing its something2 while B blocks. Perhaps there is any work around for this already?

Thanks,
Suraj