Hi, I've read the article http://www.jboss.org/community/docs/DOC-9288 about java2ParentDelegation to controll the class loader and "force" it to use the libraries from the application libs instead of the jboss libs. I've inserted the | <?xml version="1.0"?> | <!DOCTYPE jboss-app PUBLIC "-//JBoss//DTD J2EE Application 1.4//EN" "http://www.jboss.org/j2ee/dtd/jboss-app_4_0.dtd"> | <jboss-app> | <loader-repository> | Bemar:service=CronService | <loader-repository-config> | java2ParentDelegation=false | </loader-repository-config> | </loader-repository> | | <module> | <service>Cron.sar</service> | </module> | <module> | <service>Cron.jar</service> | </module> | </jboss-app> | into my jboss-app.xml but jboss is using already the library from the jboss lib. I've constructed the following test case: In the constructor of my main class (MainClass.java) I will call: | logger.info(new TestLoad().getTestLoadString()); | getTestLoadString() is a method of class TestLoad in an external jar "ClassLoadTest.jar". I have two versions of it: | TestLoad_1.0.java | public class TestLoad { | | public TestLoad() { | } | | public String getTestLoadString(){ | return "1.0"; | } | } | TestLoad_2.0.java | public class TestLoad { | | public TestLoad() { | } | | public String getTestLoadString(){ | return "2.0"; | } | } | The 1.0 version is compiled directly into the ear file. The 2.0 version lies in the ...\server\default\lib directory. But in every case the 2.0 version is taken. JBoss does not matter about the settings of the loader-repository. Do I have do adjust further settings to prevent the parent lib loading? Thx for your help Greetings Ben View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4200511#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...