Michael Whitman [http://community.jboss.org/people/gregarine] created the discussion "JBoss 5.1 AS - java.lang.NoClassDefFoundError: org/jdom/Parent" To view the discussion, visit: http://community.jboss.org/message/634873#634873 -------------------------------------------------------------- I am deploying a war on JBoss 5.1 AS.  This war has run fine on JBoss 4 and on Tomcat 5.5. error is org.jdom.JDOMException: java.lang.NoClassDefFoundError: org/jdom/Parent: org/jdom/Parent I realize from googling that it could be classloader issue.  The jdom.jar is in WEB-INF/lib. The only other apps running in this instance are apps that come with package. my jboss-web.xml <?xml version="1.0"?> <!DOCTYPE jboss-web PUBLIC "-//JBoss//DTD Web Application 2.3V2//EN" " http://www.jboss.org/j2ee/dtd/jboss-web_3_2.dtd http://www.jboss.org/j2ee/dtd/jboss-web_3_2.dtd"> <jboss-web> <class-loading java2ClassLoadingCompliance="false"> <loader-repository> LitigatorDataLoader:loader=LitigatorDataLoader.war <loader-repository-config>java2ParentDelegation=false</loader-repository-config> </loader-repository> </class-loading> </jboss-web> my jboss-classloading.xml <classloading xmlns="urn:jboss:classloading:1.0"       name="LitigatorDataLoader.war"       domain="LitigatorDataLoader_domain">      parent-domain="Ignored"      export-all="NON_EMPTY"       import-all="true">   </classloading> Any ideas as to what is wrong? Thanks, Mike -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/634873#634873] Start a new discussion in Beginner's Corner at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]