On 26.12.2013 20:15, vicky007aggar...@yahoo.co.in wrote: > Hi guys, > > Can you plz help me in understand that under what circumstances i should use > ping_mode attribute in worker.properties. > > Actually i dont understand that how it will make the applications more > reliable because as per my understanding if apache-tomcat connection results > in failure then mod_jk will fallback & try connecting with another tomcat > jvm. when this is happening automatically then what is the point of > configuring ping_mode ???? > > Please enlighten me
AJP ping/pong is a fast way of detecting low level connection problems and also some higher level problems. Reliable detection of problems must come before any retry or failover decision mod_jk can do. AJP ping/pong is especially interesting when a firewall sits between the web server and Tomcat. Depending on your connection_pool_timeout and firewall configuration, TCP idle connection drop could happen there which often results in problems if there is no good connection checking enabled - like AJP ping/pong. There are other - more rare cases - where AJP ping/pong is of help. I generally use it as a basic mechanism to make the web server to Tomcat integration more robust. For more details see http://tomcat.apache.org/connectors-doc/generic_howto/timeouts.html Regards, Rainer --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
