Hi Jan, I was working on the same issue... and was going to implement 2) :)
On Mon, Aug 24, 2015 at 4:47 PM, Jan Kaluža <jkal...@redhat.com> wrote: > > Now, the root of the error is that the scoreboard size is static (set to > proxy_lb_workers + PROXY_DYNAMIC_BALANCER_LIMIT), but it is not incremented > when ProxyPass with balancer is used in the virtualhost. This leads to lack > of space in scoreboard when Balancers are used in multiple virtualhosts. I came to the same conclusion. > > I think there are two possible fixes: > > 1) Do not use server->server_hostname when computing hash which is used to > determine right scoreboard field. I think this would fix this bug, but I'm > not sure what would happen in situations when you define 2 balancers with > the same name in different virtualhosts... They should be different balancers... > > On the other-side, when there is global Proxy balancer, it make sense to use > the same worker->s for all the ProxyPass in virtualhosts. This would break compatibility. > > 2) Increment proxy_lb_workers according to number of workers in balancer > when using "ProxyPass /foobar/ Balancer://foobar/" in the VirtualHost. The > scoreboard would have right size and ap_proxy_set_scoreboard_lb would not > fail then. I think we can do this quite easily in merge_proxy_config(), by incrementing proxy_lb_workers for each base->balancers->workers. I did not test it yet though. Regards, Yann.
