[mvapich-discuss] Re: Problems with hostname resolution and MPI_INIT() (Mike Heinz)

[Terrence.LIAO at total.com]

Mike,

We have the same problem before (posted in mvapich-discuss Digest, Vol 37, 
Issue 1) and just like you, I dug into the mvapich code and modified the 
get_host_id().  System admin told me, it is a normal practice to put 
hostname to 127.0.0.1 entry just like yours. Of course this the culprit. 
Later on, to resolve a sendmail conflict, system admin removed the 
hostname from the 127.0.0.1 entry and created the real IP to hostname 
entry on /etc/hosts. Of course, with this, no more mvapich code change for 
me.  May be the solution to this is let mvapich install guide to advise or 
recommend to create entry for hostname in /etc/hosts, and to warn the 
potential problem if added it into 127.0.0.1. (May be this is already been 
done and, well, I have to admit that I did not read the entire install 
guide. )

Thank you very much.

-- Terrence
--------------------------------------------------------
Terrence Liao, Ph.D.
Research Computer Scientist
TOTAL E&P RESEARCH & TECHNOLOGY USA, LLC
1201 Louisiana, Suite 1800, Houston, TX 77002 
Tel: 713.647.3498  Fax: 713.647.3638
Email: terrence.liao at total.com
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