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The problem where commons-logging would fail to initialise due to being unable to cast a Log class loaded from a component into a Log class loaded from the container is a separate issue and is not addressed here. And again avoiding abuse of the container model by keeping component libs inside the component will mean this problem never occurs.

Comment's by Ceki Gulcu

Simon, I've enjoyed reading your article. Cognizant of the memory leak problem you mention, the version of log4j which is currently CVS HEAD, does "not" include a context selector based on class loaders. The only selector which is included is based on JNDI. Unless I am missing something, ContextJNDISelector does not cause memory leaks. Previous versions of log4j (e.g. 1.2) did not ship with any selectors.