Comment 3 for bug 1939678

Hello Paride, thank you for your reply. I'am not sure that your minimal configuration reproduce the hole issue. I reproduce your config with 18.04/bionic and 20.04/focal. What i can say is yes with focal i saw also the error

[...]
[Wed Aug 18 08:22:14.241792 2021] [authz_core:debug] [pid 4199:tid 140445086639872] mod_authz_core.c(817): [client 10.0.2.2:2171] AH01626: authorization result of Require all granted: granted
[Wed Aug 18 08:22:14.241843 2021] [authz_core:debug] [pid 4199:tid 140445086639872] mod_authz_core.c(817): [client 10.0.2.2:2171] AH01626: authorization result of <RequireAny>: granted
[Wed Aug 18 08:22:14.241863 2021] [proxy_balancer:error] [pid 4199:tid 140445086639872] [client 10.0.2.2:2171] AH10187: ignoring params in balancer-manager cross-site access
[Wed Aug 18 08:22:14.241873 2021] [proxy_balancer:debug] [pid 4199:tid 140445086639872] mod_proxy_balancer.c(1451): [client 10.0.2.2:2171] AH01204: genning page
[Wed Aug 18 08:22:14.242740 2021] [deflate:debug] [pid 4199:tid 140445086639872] mod_deflate.c(854): [client 10.0.2.2:2171] AH01384: Zlib: Compressed 994 to 466 : URL /balancer-manager[...]

and with bionic your minimal config the error is not comming up.

[...]
[Wed Aug 18 10:21:10.436566 2021] [authz_core:debug] [pid 2527:tid 139950091626240] mod_authz_core.c(809): [client 10.0.2.2:2161] AH01626: authorization result of Require all granted: granted
[Wed Aug 18 10:21:10.436751 2021] [authz_core:debug] [pid 2527:tid 139950091626240] mod_authz_core.c(809): [client 10.0.2.2:2161] AH01626: authorization result of <RequireAny>: granted
[Wed Aug 18 10:21:10.436795 2021] [proxy_balancer:debug] [pid 2527:tid 139950091626240] mod_proxy_balancer.c(1319): [client 10.0.2.2:2161] AH01204: genning page
[Wed Aug 18 10:21:10.437269 2021] [deflate:debug] [pid 2527:tid 139950091626240] mod_deflate.c(854): [client 10.0.2.2:2161] AH01384: Zlib: Compressed 994 to 465 : URL /balancer-manager
[...]

But with your minimal config the LB Manager is not "functional" it appear no

LoadBalancer Status for ...

or

Edit worker settings for ...

So you can do nothing with the LB Manager.

If i go ahead an create the "second part /etc/apache2/sites-available/proxytest.conf" the problem is when you are on the same box without the proxy in front. You saw that the error cames one time after the first contact. But the LB Manager is fully functional and produces no further error entrys. If you go ahead and use a proxy in front than the LB Manager is not Working and every single klick create a log error.

If you are able to fix focal with your minmal configuration and the error disapear like in bionic mybe this will also fix the hole issue with the proxy in front of it.

If i can do anything more let me know that.

thx horst