Thanks for the response !

If I substitute the output from `hostname` (Chucks-iMac.local) I get the same behavior, but using `hostname -s` (Chucks-iMac) all is well.
So, to summarize:

mpirun -host localhost -np 1 java -version
mpirun -host `hostname` -np 1 java -version

mpirun -host `hostname -s` -np 1 java -version

At least I have a fix for now !

Best regards,
Chuck Mosher

From: Ralph Castain <rhc@open-mpi.org>
To: Chuck Mosher <chuckmosher@yahoo.com>; Open MPI Users <users@open-mpi.org>
Sent: Thursday, January 3, 2013 9:02 AM
Subject: Re: [OMPI users] mpirun - All Nodes Filled

Hmmm...I would say there is a bug in 1.7 then! It isn't recognizing the word "localhost" as being your local host. I'll take a look at it.


On Jan 3, 2013, at 6:53 AM, Chuck Mosher <chuckmosher@yahoo.com> wrote:

Simple question for today !

I am working on converting a public domain code suite (http://www.JavaSeis.org) to use openmpi rather than mpiJava.
So far, all has gone well, other than the usual issues with getting all the paths and variables straightened out.
For automation purposes, I would like to be able to specify everything from the command line, rather than using files.

Why does this command work:

chuck-> /usr/local/bin/mpirun -np 1 /usr/bin/java -version
java version "1.6.0_37"
Java(TM) SE Runtime Environment (build 1.6.0_37-b06-434-10M3909)
Java HotSpot(TM) 64-Bit Server VM (build 20.12-b01-434, mixed mode)

But this one does not:

chuck-> /usr/local/bin/mpirun -np 1  -host localhost /usr/bin/java -version
All nodes which are allocated for this job are already filled.

Nor does this one:

chuck-> cat hostfile
localhost slots=2

chuck->/usr/local/bin/mpirun -np 1 -hostfile hostfile /usr/bin/java -cp . -version
All nodes which are allocated for this job are already filled.

For reference:

chuck-> /usr/local/bin/mpirun -version
mpirun (Open MPI) 1.7rc5

Report bugs to http://www.open-mpi.org/community/help/

chuck-> uname -a
Darwin iMac.local 10.8.0 Darwin Kernel Version 10.8.0: Tue Jun  7 16:32:41 PDT 2011; root:xnu-1504.15.3~1/RELEASE_X86_64 x86_64

My build was done with "configure --enable-mpi-java --prefix=/usr/local".

Thanks for any insight !

Chuck Mosher

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