- On Linux and Unix environments, you can use netstat -ln to check that the correct ports have been opened by the Alfresco 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,
-Djava.net.preferIPv4Stack=trueto the startup options of Alfresco’s JVM. In a standard Linux/Unix installation, this would require editing of the JAVA_OPTS variable in the script, as follow:
tomcat/scripts/ctl.shOn a standard Windows installation, this would require adding the parameter just before ;-Dalfresco.home in:
tomcat/bin/service.batand then running the scripts:
tomcat/scripts/serviceinstall.bat REMOVE tomcat/scripts/serviceinstall.bat INSTALL
to re-register the Alfresco service with the new option.
For more information on the process of initiating clustering and the options available for configuring Alfresco clustering, see Setting up clustering.