The hostfile was changed around. As we tried to pull nodes out that we thought might have been bad. But none were over subscribed if that's what you mean.

Warner Yuen

Scientific Computing Consultant

Apple Computer

On Jul 11, 2007, at 9:00 AM, wrote:

Message: 3

Date: Wed, 11 Jul 2007 11:27:47 -0400

From: George Bosilca <>

Subject: Re: [OMPI users] OMPI users] openmpi fails on mx endpoint


To: Open MPI Users <>

Message-ID: <>

Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed

What's in the hostmx10g file ? How many hosts ?


On Jul 11, 2007, at 1:34 AM, Warner Yuen wrote:

I've also had someone run into the endpoint busy problem. I never  

figured it out, I just increased the default endpoints on MX-10G  

from 8 to 16 endpoints to make the problem go away. Here's the  

actual command and error before setting the endpoints to 16. The  

version is MX-1.2.1with OMPI 1.2.3:

node1:~/taepic tae$ mpirun --hostfile hostmx10g -byslot -mca btl  

self,sm,mx -np 12 test_beam_injection test_beam_injection.inp -npx  

12 > out12

[node2:00834] mca_btl_mx_init: mx_open_endpoint() failed with  




Process 0.1.3 is unable to reach 0.1.7 for MPI communication.

If you specified the use of a BTL component, you may have

forgotten a component (such as "self") in the list of

usable components.