I am trying to load balance between two Apache http webservers. I created a load balancer using mod_proxy_balance from Apache.
When I run my client (which generates ~100s of threads every second and tries to browse through the website), after a few seconds I start getting 502 and 503 error response codes for few threads. There are few other threads that function properly.
I feel the loadbalancer might be overloaded but im not exactly sure. Can someone please let me know how to proceed in solving this issue? Thanks!
My proxy balancer setup:
<IfModule mod_proxy_balancer.c> <Proxy balancer://hgcc13.org> BalancerMember http://hgccvm90.org/ loadfactor=1 BalancerMember http://hgccvm92.org/ loadfactor=1 </Proxy> <Location /> ProxyPass balancer://hgcc13.org/ </Location> </IfModule>
When I saw the error_log in the proxy , First I find
" connection time out to the backend servers" , then i see
" ap_proxy_connect_backend disabling worker" , and then
" All workers are in error state",
The above 3 messages are repeated for a short amount of time. Then I find only
"do_ypcall: clnt_call: RPC: Unable to send; errno = Operation not permitted ".
I ran the experiment only for 5 minutes