This would be a curative fix. This bug is now fixed, but as I don't always have control over backend applications, I'd like a preventive fix to avoid varnish to crash if it happens again in the future, since when it happens on a single URL, all the service is down.
(I actually would like to avoid varnish to crash in any case ;-) ) I think varnish stability should not depends on backend content, and it would be good to control maximum response body size... I insist on the fact that backend sends chunked responses. It would be easy to limit size based on content-length header, but I don't have this header in chunked mode... Gauthier -----Message d'origine----- De : Baptiste [mailto:[email protected]] Envoyé : vendredi 21 septembre 2012 14:17 À : Delacroix, Gauthier Cc : Nick Tailor; [email protected] Objet : Re: OOM caused by infinite loop in response Hi, Can't you simply tells Varnish to return a void response when users hit this URL? Hopefully you know in advance which URLs are buggy.... cheers On Thu, Sep 20, 2012 at 1:52 PM, Delacroix, Gauthier <[email protected]> wrote: > It's coming from the backend. > > > > Varnish cannot cache the response since it never ends. > > > > De : Nick Tailor [mailto:[email protected]] Envoyé : jeudi 20 > septembre 2012 12:35 À : Delacroix, Gauthier Objet : Re: OOM caused by > infinite loop in response > > > > If it's coming from the cache set the ttl higher for objects cached so > it serves cached content that you know is working until u fix the > issue > > Sent from my iPhone > > > On Sep 20, 2012, at 2:40 AM, "Delacroix, Gauthier" > <[email protected]> wrote: > > Hi, > > > > I have a varnish instance going out of memory because of an infinite > loop in a chunked backend response. > > > > The app is sending the same string over and over, resulting in more > than 4GB to varnish in 10 minutes.until it crashes. > > > > The dev team is fixing the bug in the backend app but I'd like to > avoid varnish crashes for this kind of problem. > > > > I have seen the "http_resp_size" option in the doc but it seems to > only handle headers size and I haven't seen anything about response body > limit. > > > > Is there a way to drop connection when response body exceeds a maximum > size ? > > > > Thanks ! > > > > Gauthier > > _______________________________________________ > varnish-misc mailing list > [email protected] > https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc > > > -- > Ce message a ete verifie par MailScanner. > > > _______________________________________________ > varnish-misc mailing list > [email protected] > https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc -- Ce message a ete verifie par MailScanner. _______________________________________________ varnish-misc mailing list [email protected] https://www.varnish-cache.org/lists/mailman/listinfo/varnish-misc
