Deploying the unmodified Example Project to an externam TomCat 6.0 server gives the following exception after some time:

feb 24, 2012 3:24:05 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive ComputerBuilder.war
log4j:WARN No appenders could be found for logger (org.hibernate.annotations.com
mon.Version).
log4j:WARN Please initialize the log4j system properly.
number of entities: 9
Fri Feb 24 15:27:20 CET 2012: Optimizing search index started.
Fri Feb 24 15:27:20 CET 2012: Optimizing search index finished succesfully.
Exception in thread "Timer-0" java.lang.NullPointerException
		at com.mchange.v2.log.log4j.Log4jMLog$Log4jMLogger.isLoggable(Log4jMLog.
java:255)
		at com.mchange.v2.resourcepool.BasicResourcePool$CullTask.run(BasicResou
rcePool.java:1934)
		at java.util.TimerThread.mainLoop(Timer.java:555)
		at java.util.TimerThread.run(Timer.java:505)

However, the webapplication continues to function.

Submitted by D. Pelsmaeker on 24 February 2012 at 15:30