After upgrading from Apache 2.2.6 to Apache 2.2.9, when gracefully shutting down one of our Embedded Tomcats on our application server, we notice a temporary outage (503) from our proxy balancer before the Hot Standby (status=+H) takes over. Layout: - Application proxy server (Apache 2.2.9) - Proxies requests via mod_proxy/mod_proxy_balancer/mod_proxy_ajp to application server - Application server (Java) - Runs master Java application server with Embedded Tomcat (Tomcat/5.5.17) on port 8009 - Runs slave Java application server with Embedded Tomcat (Tomcat/5.5.17) on port 8008 When the application proxy server was Apache 2.2.6, we were able to gracefully shutdown the master Tomcat server (calling embedded.stop()), and the Hot Standby (status=+H) BalancerMember would immediately start serving requests. After the upgrade to 2.2.9, we see "HTTP/1.1 503 This application is not currently available" while the active BalancerMember is shutting down before the Hot Standby takes over (~ 1 second). These errors appear in both the Tomcat access log and the Apache access log. I have recompiled and tested Apache versions 2.2.6, 2.2.8, 2.2.9 and 2.2.11 to verify that this problem exists at some point after version 2.2.6. I still had the problem when switching the BalancerMember protocol from ajp:// to http://, so I think this rules out AJP-specific issues. I was unable to reproduce the problem using Apache servers as the BalancerMembers, so I'm speculating this has something to do with the interaction with Tomcat. Please let me know what other information would be helpful in resolving this issue. Proxy conf: ================================= ProxyPassMatch /(.+/)?application.server$ balancer://production_server <Proxy balancer://production_server/> BalancerMember ajp://server.domain.tld:8009/ lbset=1 retry=10 loadfactor=100 BalancerMember ajp://server.domain.tld:8008/ lbset=2 retry=10 status=+H ProxySet lbmethod=bytraffic </Proxy> ================================= Thanks, Michael --------------------------------------------------------------------- The official User-To-User support forum of the Apache HTTP Server Project. See <URL:http://httpd.apache.org/userslist.html> for more info. To unsubscribe, e-mail: users-unsubscribe@xxxxxxxxxxxxxxxx " from the digest: users-digest-unsubscribe@xxxxxxxxxxxxxxxx For additional commands, e-mail: users-help@xxxxxxxxxxxxxxxx
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