[OMPI users] mpirun Only Works When Second Ethernet Interface Disabled

Ok, I'm totally flummoxed here. I'm an ISV delivering a C program that can use MPI for it's inter-node communications. It has been deployed on a number (dozens) of small clusters and has been working pretty over the last few months. That is, until someone tried to change the static IP address

[OMPI users] Proper use of sigaction in Open MPI?

Hello, all - I have an OpenMPI application that generates a file while it runs. No big deal. However, I'd like to delete the partial file if the job is aborted via a user signal. In a non-MPI application, I'd use sigaction to intercept the SIGTERM and delete the open files there. I'd then