[MPICH] No route to host problem

[Patrick E. Kane]

Below is more info on the "No route to host" problem.
I did an "strace" of the python process as it gave this error msg:

   0: aborting job:
   0: Fatal error in MPI_Bcast: Other MPI error, error stack:
   0: MPI_Bcast(827): MPI_Bcast(buf=0xbffff88c, count=1, MPI_INT, root=0, 

Here an interesting part of the Linux system call trace log:
 ...
 connect(7, {sa_family=AF_INET, sin_port=htons(32805),
         sin_addr=inet_addr("192.168.9.3")}, 
         16) = -1 EINPROGRESS (Operation now in progress)
 poll([{fd=4, events=POLLIN}, {fd=7, events=POLLOUT, 
      revents=POLLERR|POLLHUP}], 2, -1) = 1
 getpeername(7, 0xbffff480, 
             [16])  = -1 ENOTCONN (Transport endpoint is not connected)
 getsockopt(7, SOL_SOCKET, SO_ERROR, [113], [4]) = 0
 write(2, "aborting job:\nFatal error in MPI_Bcast: Other MPI error"...