Hi, /Tomcat 7.0.10, OSX 10.6.5, jk 1.2.31, and httpd 2.2.17/
Without any explicit parameters in server.xml, just by setting the jvmRoute attribute in the Engine element and enabling Clustering, session failover worked if I shut down one or the other tomcat instance or the one httpd that was not the reverse proxy. However when I just stopped the example webapp in one tomcat, the session did not failover and I received a 404 http error instead of the expected session page from the other tomcat. Based upon the instructions found in the book: http://proquest.safaribooksonline.com/9780596101060/tomcat_6_clustering_implementation?sessionid=&reader=html&imagepage= explicitely: <nyissz> You'll also need to add distributed="true" to the webapp's <Context> element. If there is no <Context> element declared for it anywhere, you will need to create one. You can create one by making a newCATALINA_HOME/conf/[EngineName]/[HostName]/examples.xml context XML fragment file or by adding one to server.xml. <nyassz> my thought was that the ReplicatedContect was not initiated. Well, I already learned that I should not add any context into server.xml and there is nothing in the bml0066:local administrator$ ls -l tomcat1/conf/Catalina/localhost/ bml0066:local administrator$ directory, so I created a META-INF directory inside the examples directory and placed a context.xml there with the following content: bml0066:local administrator$ cat tomcat1/webapps/examples/META-INF/context.xml <?xml version="1.0" encoding="UTF-8"?> <Context className="org.apache.catalina.ha.context.ReplicatedContext" distributed="true" > </Context> I did it on both tomcats and bounced them. Now when I look the log, I see the following warning just after restart: INFO: Deploying web application directory examples Apr 11, 2011 12:00:28 PM org.apache.catalina.startup.SetContextPropertiesRule begin WARNING: [SetContextPropertiesRule]{Context} Setting property 'distributed' to 'true' did not find a matching property. Apr 11, 2011 12:00:28 PM org.apache.catalina.tribes.tipis.AbstractReplicatedMap init INFO: Initializing AbstractReplicatedMap with context name:/examples Apr 11, 2011 12:00:28 PM org.apache.catalina.core.ApplicationContext log INFO: ContextListener: contextInitialized() Apr 11, 2011 12:00:28 PM org.apache.catalina.core.ApplicationContext log INFO: SessionListener: contextInitialized() So the first question is, should I use the distributed="true" property here ? Is the book right ? I think it is from 2007. I already have the <distributable/> tag in the webapp's web.xml. The second question is what to do to avoid the 404 message and fail the session over instead of it, when I just stop the webapp on the tomcat instance? By default I am using sticky sessions. <nyissz> bml0066:local administrator$ cat apache2/conf/workers.properties worker.list = lb,jkstatus worker.lb.type=lb worker.lb.balance_workers=tomcat1,tomcat3 #,tomcat2,tomcat4 worker.lb.sticky_session = True worker.lb.sticky_session_force = False worker.jkstatus.type=status worker.tomcat1.type = ajp13 worker.tomcat1.host = bml0066.yalepath.org worker.tomcat1.port = 8109 worker.tomcat1.lbfactor = 1 worker.tomcat1.redirect=tomcat3 #worker.tomcat2.type = ajp13 #worker.tomcat2.host = bml0066.yalepath.org #worker.tomcat2.port = 8209 #worker.tomcat2.lbfactor = 1 #worker.tomcat2.redirect=tomcat4 worker.tomcat3.type = ajp13 worker.tomcat3.host = bml0065.yalepath.org worker.tomcat3.port = 8309 worker.tomcat3.lbfactor = 1 worker.tomcat3.redirect=tomcat1 #worker.tomcat4.type = ajp13 #worker.tomcat4.host = bml0065.yalepath.org #worker.tomcat4.port = 8409 #worker.tomcat4.lbfactor = 1 #worker.tomcat4.redirect=tomcat2 <nyassz> Thanks ahead, János
