If you enable the default request logger (in 1.4-*), it throws a NullPointerException.
The problem comes from this commit from Johan: http://fisheye6.atlassian.com/browse/wicket/trunk/wicket/src/main/java/org/apache/wicket/protocol/http/RequestLogger.java?r1=646020&r2=646810 The field "active" was changed from an int to an AtomicInteger. Just changing that line to instantiate a new AtomicInteger should fix it. -- Jeremy Thomerson http://www.wickettraining.com