From owner-chemistry -8 at 8- ccl.net Tue Nov 18 10:46:01 2008
From: "Jozsef Csontos jcsontos.lists .. gmail.com" <owner-chemistry###server.ccl.net>
To: CCL
Subject: CCL: mpirun failure
Message-Id: <-38117-081118104055-16768-2Qergr/O4i9bYJNCuk4H3w###server.ccl.net>
X-Original-From: Jozsef Csontos <jcsontos.lists-x-gmail.com>
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Date: Tue, 18 Nov 2008 16:40:20 +0100
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Sent to CCL by: Jozsef Csontos [jcsontos.lists]![gmail.com]
Hi John,

I believe that you use ssh for communication and you don't have
passwordless connection from your node (CPU0) to your node (CPU1) in
your smp machine. Below I pasted one of my earlier reply to a similar
problem.
> You should work on this issue. (for example: generate a public key with
> "ssh-keygen -t rsa" on the master node then put the content of the
> generated file into the authorized_keys file on the working nodes "cat
> ~/.ssh/id_rsa.pub | ssh hostname_of_your_working_node "cat- >>
> ~/.ssh/authorized_keys") However, this procedure strongly depends on
> your cluster configuration.
>
> I hope it helps,
>
> Jozsef
In your case the above means that,

A, ssh-keygen -t rsa (just press enter 3 times)
B, cp .ssh/id_rsa.pub .ssh/authorized_keys
C, try it (ssh localhost - first time you got a keyring question than
you're done)

Or you can try to google,
http://www.google.com/search?hl=en&q=passwordless+ssh&btnG=Google+Search&aq=1&oq=passwordl

Good luck,

Jozsef

John McKelvey jmmckel^^gmail.com wrote:
> Folks,
>
> This pgm fpi [included in the mpich-1.2.7p1 tarball, computes pi] runs
> fine on 1 processor on SMP box but for 2 processors I get the below,
> knowing that 127.0.0.1 <http://127.0.0.1> means "looping back".  Any
> hints how to make this work most appreciated with mpich-1.2.7p1 [I
> have to use this version of mpich.]
>
> Many thanks!
>
> John McKelvey
>
> $mpirun -np 2 fpi
> connect to address 127.0.0.1 <http://127.0.0.1>: Connection refused
> Trying krb4 rsh...
> connect to address 127.0.0.1 <http://127.0.0.1>: Connection refused
> trying normal rsh (/usr/bin/rsh)
> localhost.localdomain: Connection refused
>
> p0_4885:  p4_error: Child process exited while making connection to
> remote process on localhost.localdomain: 0
> Interrupt
> p0_4885: (33.019531) net_send: could not write to fd=4, errno = 32
>
>
>
>