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From: Bill Johnstone (beejstone3_at_[hidden])
Date: 2007-07-17 13:12:42

Hello all.

I could really use help trying to figure out why mpirun is hanging as
detailed in my previous message yesterday, 16 July. Since there's been
no response, please allow me to give a short summary.

-Open MPI 1.2.3 on GNU/Linux, 2.6.21 kernel, gcc 4.1.2, bash 3.2.15 is
default shell
-Open MPI installed to /usr/local, which is in non-interactive session
-Systems are AMD64, using ethernet as interconnect, on private IP

mpirun hangs whenever I invoke any process running on a remote node.
It runs a job fine if I invoke it so that it only runs on the local
node. Ctrl+C never successfully cancels an mpirun job -- I have to use
kill -9.

I'm asking for help trying to figure what steps have been taken by
mpirun, and how I can figure out where things are getting stuck /
crashing. What could be happening on the remote nodes? What debugging
steps can I take?

Without MPI running, the cluster is of no use, so I would really
appreciate some help here.

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