On Tue, Aug 25, 2009 at 7:20 PM, Igor Chudov<ichu...@gmail.com> wrote: > My new perlbal.conf is included: > > REATE POOL dynamic > pool dynamic add 127.0.0.1:10080 > > CREATE SERVICE balancer > SET listen = 0.0.0.0:80 > SET role = reverse_proxy > SET pool = dynamic > SET persist_client = on > SET persist_backend = off > SET verify_backend = on
With verify_backend = on, perlbal makes an OPTIONS request to the mod_perl server. That request usually returns an empty 200, which in other scenarios could be viewed as a blank page. How perlbal would send that back to the client is something I don't know. But I would consider disabling that option as it doubles the number of total requests to the backend mod_perl server. That's just my opinion though, changing that failure could cause other failure modes to surface. If you want to use that option, you should write a mod_perl handler that answers to a verify_backend url (see the perlbal docs) and returns a few characters of text back to perlbal. If you see those characters in your blank screens - that's the problem. Although I'm skeptical that is what is happening.
