Apache Version 2.4.34 (Win64) Apache Tomcat 6.0.44 Windows Server 2016 Standard Version 1607
After a certain period (1-2 hours). Application Performance becomes extremely poor and some time leads to Maintenance (Service Temporarily Unavailable) page.
In Tomcat logs i cannot find any problem. In Apache logs:
[Mon Apr 15 08:41:49.585041 2019] [proxy_ajp:error] [pid 3880:tid 1044] (OS 10060)A connection attempt failed because the connected party did not properly respond after a period of time, or established connection failed because connected host has failed to respond. : AH01030: ajp_ilink_receive() can't receive header [Mon Apr 15 08:41:49.585041 2019] [proxy_ajp:error] [pid 3880:tid 1044] [client 184.108.40.206:50880] AH00992: ajp_read_header: ajp_ilink_receive failed, referrer ...
Apart from the above given logs. Logs are full with following entries
[Mon Apr 15 08:41:20.131907 2019] [proxy_balancer:error] [pid 3880:tid 1092] [client 220.127.116.11:54316] AH01167: balancer://ajaxbalancer: All workers are in error state for route (ajaxB), referer: https://url here
Database has been ruled out as a problem since there are no locks and query execution time is also normal and db Server is in optimal health.
There are 2 Servers running in Cluster Environment using Load balancer.
Tomcat configuration on both the servers is same:
<Connector port="8109" protocol="AJP/1.3" redirectPort="8443" maxConnections="-1" connectionTimeout="300000" keepAliveTimeout="300000" />
ProxyErrorOverride Off ProxyTimeout 120 Timeout 120 ProxyPass /static_html ! <Proxy balancer://ajaxbalancer/> BalancerMember ajp://127.0.0.1:8109/app route=Srv1 loadfactor=10 ttl=90 BalancerMember ajp://127.0.0.1:8109/app route=Srv1 loadfactor=10 ttl=90 ProxySet stickysession=JSESSIONID|jsessionid scolonpathdelim=On nofailover=On #ProxySet lbmethod=bybusyness ProxySet lbmethod=byrequests </Proxy> <Location "/swingApp/"> ProxyPass balancer://ajaxbalancer/ ProxyPassReverse balancer://ajaxbalancer/ ProxyPreserveHost On SetEnv keepalive=on </Location>
I request you to help me the topic. If any further information is required please let me know.