Many frameworks and libraries like Spring or EJB are introducing hundreds of synthetic method invocations (AOP, dynamic proxies, CGLIB-generated classes, etc.) They are irrelevant for most of the time and only cluttering the stack traces printed by Logback.

It would be nice to have possibility to filter (possibly by providing a set of patterns in logback.xml) each stack trace line and skip selected ones. Similar feature is implemented in some IDEs, see: http://blogs.jetbrains.com/idea/2010/07/console-folding-customization.