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Subject: Re: [OMPI users] Test Program works on 1, 2 or 3 nodes. Hangs on 4 or more nodes.
From: Prentice Bisbal (prentice_at_[hidden])
Date: 2010-09-21 16:50:59

Ashley Pittman wrote:
> This smacks of a firewall issue, I thought you'd said you weren't using one but now I read back your emails I can't see anywhere where you say that. Are you running a flrewall or any iptables rules on any of the nodes? It looks to me like you may have some setup from on the worker nodes.
> Ashley.

I agree with Ashley. To make sure it's not an IP tables or SELinux
problem on one of the nodes, run these two commands on all teh nodes and
then try again:

service iptables stop
setenforce 0