Use these troubleshooting tips when testing cache clustering.
In Linux/Unix environments, you can use netstat -ln to check that the correct ports have been opened by the server on the correct network adapters. You can use telnet <hostname><port> to check if each open port can be reached by each cluster member.
If your cluster members are using NAT and IPv4 addresses, you might need to force the server to listen on IP V4 addresses rather than IP V6. To do this, add:
-Djava.net.preferIPv4Stack=true
to the startup options of Content Services JVM. In a standard Linux/Unix installation, this would require editing of the JAVA_OPTS variable in the following script:
tomcat/scripts/ctl.sh
On a standard Windows installation, this would require adding the parameter just before ;-Dalfresco.home in:
tomcat/bin/service.bat
and then running the scripts:
tomcat/scripts/serviceinstall.bat REMOVE tomcat/scripts/serviceinstall.bat INSTALL
to re-register the service with the new option.
See Clustering for more information on the process of initiating clustering and the options available for configuring clustering.