I am running into some issues with trying to load libs from my application instead of what comes with JBoss. I am trying to make use of the latest and greatest SLF4J in my application and in doing so I am getting the following messages: SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [vfszip:/C:/devtools/workspace/g2/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_5.1_Runtime_Server1302541739184/deploy/ecotrakEar.ear/ecotrak.war/WEB-INF/lib/slf4j-log4j12-1.6.1.jar/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [vfszip:/C:/devtools/jboss-5.1.0.GA/common/lib/slf4j-jboss-logging.jar/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. In my application I have the following jars located in my WAR lib directory: jul-to-slf4j-1.6.1.jar slf4j-api-1.6.1.jar slf4j-log4j12-1.6.1.jar My project is deployed as an EAR with a WAR. All libraries reside in the WAR. Based on some research it has been suggested that for JBoss 5.1 that a jboss-classloading.xml file be created. I have created one for my EAR: <classloading xmlns="urn:jboss:classloading:1.0" name="ecotrak.ear" domain="ecotrak.ear" export-all="NON_EMPTY" import-all="true" parent-first="false"> </classloading> This identifies that the EAR file is to be loaded first. I have also created one for my WAR: <classloading xmlns="urn:jboss:classloading:1.0" name="ecotrak.war" domain="ecotrak.war" parent-domain="ecotrak.ear" top-level-classloader="true" export-all="NON_EMPTY" import-all="true" parent-first="true"> </classloading> With this configuration I am getting the following error in the startup logs: 11:18:07,949 ERROR [[/ecotrak]] Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener java.lang.NoSuchMethodError: org.slf4j.spi.LocationAwareLogger.log(Lorg/slf4j/Marker;Ljava/lang/String;ILjava/lang/String;[Ljava/lang/Object;Ljava/lang/ThrowableV at org.apache.commons.logging.impl.SLF4JLocationAwareLog.trace(SLF4JLocationAwareLog.java:107) What is the correct way in order to have jars from my project be loaded before JBoss's? Continue reading...