Look at the logs in the netscaler for service or vserver down, it seems to me that the vserver you're pointing the varnish to, is going up and down and that's why the 503 response from the netscaler.<br><br>Regards, Pablo<br>
<br><br><div class="gmail_quote">On Thu, Jan 15, 2009 at 5:08 AM, Naama Bamberger <span dir="ltr"><<a href="mailto:naama@answers.com">naama@answers.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
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<p>We're using Varnish 2.0.1 on our site, with Citrix Netscaler
between Varnish and our Apache Web machines.</p>
<p>We're getting hundreds of sporadic 503 errors an hour.</p>
<p>When I let Varnish round-robin between our web machines,
bypassing the load balancer, the problem disappears.</p>
<p>(We don't want to use this as a permanent solution, though,
for failover and maintenability reasons).</p>
<p> </p>
<p>Are there any known issues regarding Varnish and Citrix
Netscaler?</p>
<p> </p>
<p>Thanks,</p>
<p>Naama</p>
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