[Spread-users] Re: Problem with communicating between 2 computers
Rodrick Brown
rodrick.brown at gmail.com
Thu Jun 12 13:57:21 EDT 2008
Are you sure your system is listening to multicast on the correct
interface(s) ?
Here in my configuration I have two spread daemons running on my server
farm.on two seperate spread segments
The following output should be the same across all your nodes in the spread
group.
$ cat /etc/sysconfig/network-scripts/route-eth1
224.0.0.0/4 dev eth1
[svcstg at nycplx01b logs]$ netstat -g
IPv6/IPv4 Group Memberships
Interface RefCnt Group
--------------- ------ ---------------------
lo 1 all-systems.mcast.net
eth0 1 all-systems.mcast.net
eth1 2 224.0.0.32
eth1 2 224.0.0.31
eth1 1 all-systems.mcast.net
eth2 1 all-systems.mcast.net
lo 1 ff02::1
eth0 1 ff02::1:ff67:fa10
eth0 1 ff02::1
eth1 1 ff02::1:ff67:fa12
eth1 1 ff02::1
eth2 1 ff02::1:ff6a:e5aa
eth2 1 ff02::1
On Thu, Jun 12, 2008 at 12:58 PM, ADAM PETER BEARDSLEY <abeardsley at wisc.edu>
wrote:
> Thanks for the suggestion
> Unfortunately, when I shut down the firewalls, I saw no changes in spread.
> I tried restarting the daemons so it would reconfigure, but I got the same
> messages, and still no inter-computer communication.
> Anyone have any more ideas?
>
> Thanks
> -Adam
>
> ---------- Forwarded message ----------
> From: 李响 <lixiang02 at mails.tsinghua.edu.cn>
> To: abeardsley at wisc.edu
> Date: Thu, 12 Jun 2008 10:02:38 +0800
> Subject: to :Problem with communicating between 2 computers
> hi Adam,
> please try to shut down the firewall on each computer.
> I met the same problem when I tried to comunicate 2 machines with
> spread(spuser) the day before yesterday.
> I shut down the firewalls this morning(HongKong time, haha), problem
> solved!
> I subscribed to user-list for 3 days and I received this letter(see
> ----Forwarded message----below) this morning. I reply directly to you as
> soon as possible, wish this letter can help you.
> I am new to spread, too.
> I use OS: redhat enterprise linux AS 4.
> cmd: #service iptables stop
>
> best wishes
>
> LI Xiang
>
>
> ---------- Forwarded message ----------
> From: spread-users-request at lists.spread.org <
> spread-users-request at lists.spread.org>
> Date: 2008-6-12 0:00
> Subject: Spread-users Digest, Vol 42, Issue 9
> To: spread-users at lists.spread.org
>
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> 1. Problem with communicating between 2 computers
> (ADAM PETER BEARDSLEY)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 10 Jun 2008 12:47:46 -0500
> From: ADAM PETER BEARDSLEY <abeardsley at wisc.edu>
> Subject: [Spread-users] Problem with communicating between 2 computers
> To: spread-users at lists.spread.org
> Message-ID: <f83ac561f61.484e77f2 at wiscmail.wisc.edu>
> Content-Type: text/plain; charset=us-ascii
>
> Hello
> I'm new to spread, and I'm doing some experimenting to get a couple
> computers to talk to each other.
> I can run the daemon just fine on each machine separately, and have
> different processes send and receive messages between each other (using
> spuser, as well as a simple program I wrote to get used to the C API).
> The problem occurs when I try to get the daemons to recognize each other.
> Here is what my config file looks like (identical on both machines):
>
> Spread_Segment 128.104.165.255:4803 {
> machine1 128.104.165.48
> machine2 128.104.165.47
> }
>
> Both daemons load successfully, but I get the following message on
> machine1:
>
> Configuration at machine1 is:
> Num Segments 1
> 1 128.104.165.255 4803
> machine1 128.104.165.48
>
> and a similar message on machine2 with the corresponding IP.
> Then when I run spuser, the machines don't seem to recognize that the other
> exists.
> Any ideas would be greatly appreciated.
>
> Thanks in advance!
>
> -Adam
>
>
>
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> End of Spread-users Digest, Vol 42, Issue 9
> *******************************************
>
>
>
> --
> Best Wishes!
>
> LI Xiang
> ______________
>
> Institute of System Engineering
> Department of Automation, Tsinghua University
> Room 513, 24#
> Beijing 100084, P. R. China
> Tel: +86-10-51774513
> Email: lixiang02 at mails.tsinghua.edu.cn
>
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--
[ Rodrick R. Brown ]
http://www.rodrickbrown.com http://www.linkedin.com/in/rodrickbrown
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