Problems with mpiexec comm=mpich-p4 and PBSPro

[Chris Sauerwald]

Hello all,

I am trying to run the following simple script from an interactive qsub 
session (qsub -I -l nodes=2:ppn=2).

#!/bin/sh
/scratch/ecnode04/mpich-test/hello

the 'hello' command is the test program that comes with mpiexec, when try 
to launch the job with the following line:
mpiexec -n 4 -v test.sh (default comm mode is mpich-p4)

I get the following results:
node  0: name = ******04, cpu = 0
node  1: name = ******03, cpu = 0
node  2: name = ******04, cpu = 1
node  3: name = ******03, cpu = 1
wait_one_task_start: evt = 2, task 0 host ******04
read_p4_master_port: waiting for port from master
hello from 0/1 name ******04 with 0 args:

This program will sit until I break it with ^C.

I am mostly curious about what read_p4_master_port is referring to when it 
says 'master'.
I'm assuming I'm not launching a daemon somewhere but I can't find any 
documentation that describes this error or that tells of a daemon that 
must be run for mpiexec to work with MPICH.  

Does anyone have any suggestions?
I'm running MPICH 1.2.4, mpiexec-0.71 and PBSPro 5.2.2b

Thanks in advance,
Chris