I have CentOS6.4 with tomcat 6.0.24 and jdk1.7.21. I've successfully launched Guvnor 5.5.0-Final, created some facts, rules and knowledgebase. Generated WAR file for knowledgebase as described here http://docs.jboss.org/drools/release/5.5.0.Final/drools-guvnor-docs/html/... When deploying this file on tomcat I have the following in tomcat logs: Oct 24, 2013 3:26:58 PM org.apache.catalina.startup.HostConfig deployWAR INFO: Deploying web application archive drools-service.war log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. Oct 24, 2013 3:28:00 PM org.apache.catalina.core.StandardContext start SEVERE: Error listenerStart Oct 24, 2013 3:28:00 PM org.apache.catalina.core.StandardContext start SEVERE: Context [/drools-service] startup failed due to previous errors Oct 24, 2013 3:28:00 PM org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap SEVERE: A web application created a ThreadLocal with key of type [org.springframework.core.NamedThreadLocal] (value [XML bean definition resources currently being loaded]) and a value of type [null] (value [null]) but failed to remove it when the web application was stopped. To prevent a memory leak, the ThreadLocal has been forcibly removed. What could be the reason of this? -- View this message in context: http://drools.46999.n3.nabble.com/Error-deploying-knowledge-base-war-on-t... Sent from the Drools: User forum mailing list archive at Nabble.com.