it helps a bit (the CCE happens when replaying transaction modifications on remote instances during a commit) but the logs aren't very detailed. Between the <DEBUG> <14:26:47,422> <Adding Method MethodName: _put; MethodIdInteger: 3; Args: (GlobalTransaction:<10.23.65.38:1214>:72, | /MyApp/Portfolios/Portfolio_cache, item, {BIG_TOSTRING} | and | <ERROR> <14:26:59,971> <method invocation failed> <App.TxInterceptor> | (stack trace) | lines I would have expected many more lines of logging - especially if you use TRACE level logging. I see that you are using WebLogic logging and it could be that this isn't logging everything. Could I ask you to add log4j.jar to your application, as well as a log4j.xml file in your classpath so that this is also logged using log4j? See the JBoss Cache distribution for a sample log4j.xml file. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4101310#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...