Taming Tomcat

Clustering: Quick HOWTO

• All your session attributes must implement java.io.Serializable
• Uncomment the Cluster element in server.xml
• Uncomment the Valve(ReplicationValve) element in server.xml
• If your Tomcat instances are running on the same machine, make sure the tcpListenPort attribute is unique for each instance.
  • Better still, don't run them on the same machine
• Make sure the web.xml for each application has the <distributable/> element
  • and each application actually is distributable!

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