[jboss-user] [Javassist user questions] - Javassist class loader vs. Apache Commons logging

Hi all, I want to instrument an application that uses the Apache Commons logging component. I use the Javassist class loader and have added my own translator. However, the logging library seems to rely on the class loader hierarchy; the application crashes with the attached exception. Do you have any experience combining Javassist and the Apache Commons logging component? Regards, Michael anonymous wrote : | org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy. You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed. (Caused by org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy. You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.) (Caused by org.apache.commons.logging.LogConfigurationException: org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy. You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed. (Caused by org.apache.commons.logging.LogConfigurationException: Invalid class loader hierarchy. You have more than one version of 'org.apache.commons.logging.Log' visible, which is not allowed.)) | at org.apache.commons.logging.impl.LogFactoryImpl.newInstance(LogFactoryImpl.java:543) | at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:235) | at org.apache.commons.logging.impl.LogFactoryImpl.getInstance(LogFactoryImpl.java:209) | at org.apache.commons.logging.LogFactory.getLog(LogFactory.java:351) | at org.java.plugin.ObjectFactory.newInstance(ObjectFactory.java:80) | at org.java.plugin.ObjectFactory.newInstance(ObjectFactory.java:51) | at net.sf.jabref.plugin.PluginCore.initialize(PluginCore.java:72) | at net.sf.jabref.plugin.PluginCore.getManager(PluginCore.java:180) | at net.sf.jabref.imports.ImportFormatReader.resetImportFormats(ImportFormatReader.java:74) | at net.sf.jabref.JabRef.(JabRef.java:103) | at net.sf.jabref.JabRef.main(JabRef.java:79) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at net.sf.jabref.JabRefMain.main(Unknown Source) | at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) | at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) | at java.lang.reflect.Method.invoke(Method.java:597) | at javassist.Loader.run(Loader.java:290) | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4191744#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...