Re: [Sqlgrey-users] Load balancing question, part 2

[Karl O. P. <ko...@me...>]

On 04/26/2010 05:36:15 PM, Gary Smith wrote:
> > You could try talking with the load balancing folk.
> > 
> 
> I'm working with them on this as well.  As for right now, sqlgrey is
> the only service that I am having problems with.  I had issues with
> mysql as well, but fixing the arp issue seemed to resolve it for that
> server.  It did not however resolve it for sqlgrey.  I'm pretty sure
> that it has something to do with the return close from postfix to the
> load balancer.  I don't think that the close is actually making it
> back.  At the same time, postfix enters a FIN_WAIT for a minute or 
> so,
> then it falls off.
> 
> Anyway, I will also check with the postfix group as well as there
> could be something in the closure logic for policy maps that's only
> brought forward during this type of scenario.

If postfix is in FIN_WAIT then it thinks the tcp connection is
closed.  IIRC FIN_WAIT is a TCP delay that avoids accidentally
injecting old packets that are still on the wire into
a new TCP session. (See the TCP RFC.)




Karl <ko...@me...>
Free Software:  "You don't pay back, you pay forward."
                 -- Robert A. Heinlein