jessionid and server.id

An interesting detail: if you’re dealing with ColdFusion clustering on J2EE servers, the file connector.properties in the …\servers\cfusion\SERVER-INF folder containts a property called server.id. This property stores the four first characters of the automatically created JESSIONID values for ColdFusions session handling.

For example if the server.id is set to abcd, all your JESSIONIDs on that machine will look like abcd…. It seems that it is possible to change that setting with a value you’d like to use there, but I’m not totally sure. I played with that setting a bit today in a small cluster and there didn’t seem to be any issues with it for now.