LVS
lvs-users
Google
 
Web LinuxVirtualServer.org

Re: Large HTTP GET/POST timeout

To: Casey Zacek <cz@xxxxxxxxxxxx>
Subject: Re: Large HTTP GET/POST timeout
Cc: lvs-users@xxxxxxxxxxxxxxxxxxxxxx
From: Julian Anastasov <ja@xxxxxx>
Date: Thu, 27 May 2004 10:33:44 +0300 (EEST)
        Hello,

On Wed, 26 May 2004, Casey Zacek wrote:

> "For very few users, when they post long posts (anything over a few
> lines) and hit submit, the browser appears to hang and finally it
> times out. Similar effects if they try and update their profiles. I
> even experienced this on my home computer. I use a proxy server
> sometimes and it showed the request being transmitted from my computer
> but ultimately no response was received from the site. Now, in most
> instances of this, we have found that the affected users are on
> broadband using a router of some type. I myself use a cable modem
> connected through a Linksys Router. When I experienced the issue, I
> was able to post from work, but not from home. I fiddled with my
> setup, thinking it was cookies or caching of some type and ultimately
> performed a firmware upgrade on my router. Suddenly the problem went
> away."
>
> At the time, I was running kernel 2.4.25 (IPVS 1.0.10), but since
> upgraded to 2.4.26 (IPVS 1.0.11), then 2.6.6 (IPVS 1.2.0).  I have
> asked the customer to retest it, but he'll have to talk to some of his
> users, from the sound of things, since he upgraded his router
> firmware.  I'd love to chalk it up to "client router problems," but
> that probably won't be good enough for this customer.  It worked using
> a Riverstone smartswitch router running what equates to LVS-NAT, but
> it does not work with this LVS-Tun setup.
>
> With all three versions, I get a lot of these messages:
>
> IPVS: ip_vs_tunnel_xmit(): frag needed

        This message means that the IPVS box decides to generate
ICMP errors to request reducing the packet size. May be these
ICMP messages are filtered somewhere and do not reach the client.

Regards

--
Julian Anastasov <ja@xxxxxx>
<Prev in Thread] Current Thread [Next in Thread>