What makes me wonder if VFSTopLevelClassLoaderSystemDeployer is called is because it declares that it needs a ClassLoaderFactory as input. anonymous wrote : | [DeployersImpl] Added deployer protomcf.test.deployer.TestClassloaderDeployer@1b688c0 for stage ClassLoader | org.jboss.web.tomcat.service.deployers.WarClassLoaderDeployer(a)80bc28{inputs=[org.jboss.metadata.web.jboss.JBossWebMetaData, org.jboss.deployers.structure.spi.ClassLoaderFactory] outputs=[]} | protomcf.test.deployer.TestClassloaderDeployer@1b688c0{inputs=[] outputs=[]} | org.jboss.deployers.vfs.plugins.classloader.VFSTopLevelClassLoaderSystemDeployer(a)6c5356{inputs=[org.jboss.deployers.structure.spi.ClassLoaderFactory] outputs=[]} | And when my classloader is called, just before VFSTopLevelClassLoaderSystemDeployer would be called, it shows me that no ClassLoaderFactory attachment is available... anonymous wrote : | [TestClassloaderDeployer] ClassLoaderFactory not present... | [TestClassloaderDeployer] ClassLoader not present... | [BaseClassLoader] Created BaseClassLoader@f157b0{vfsfile:/C:/jboss5-beta4/jboss-5.0.0.Beta4/server/default/deploy/apptest.jar} with policy VFSClassLoaderPolicy@b3f6c2{domain=null roots=[JarEntryHandler(a)17656871[path=apptest.jar/WEB-INF/classes context=file:/C:/jboss5-beta4/jboss-5.0.0.Beta4/server/default/deploy/ real=jar:file:/C:/jboss5-beta4/jboss-5.0.0.Beta4/server/default/deploy/apptest.jar!/WEB-INF/classes/], MemoryContextHandler@3643618[path=classes context=vfsmemory://5c4o1e5d-bqyidg-fcm2qgcx-1-fcm46gz5-1m real=vfsmemory://5c4o1e5d-bqyidg-fcm2qgcx-1-fcm46gz5-1m/classes]] delegates=[] exported=[testapp]NON_EMPTY} | 2008-02-13 16:45:25,760 DEBUG [org.jboss.classloader.spi.base.BaseClassLoaderDomain] ClassLoaderDomain@1c09624{} registerClassLoader BaseClassLoader@f157b0{VFSClassLoaderPolicy@b3f6c2{domain=null roots=[JarEntryHandler(a)17656871[path=apptest.jar/WEB-INF/classes context=file:/C:/jboss5-beta4/jboss-5.0.0.Beta4/server/default/deploy/ real=jar:file:/C:/jboss5-beta4/jboss-5.0.0.Beta4/server/default/deploy/apptest.jar!/WEB-INF/classes/], MemoryContextHandler@3643618[path=classes context=vfsmemory://5c4o1e5d-bqyidg-fcm2qgcx-1-fcm46gz5-1m real=vfsmemory://5c4o1e5d-bqyidg-fcm2qgcx-1-fcm46gz5-1m/classes]] delegates=[] exported=[testapp]NON_EMPTY}} | I am going to hack VFSTopLevelClassLoaderSystemDeployer to try and understand what's happening but admittedly I am little puzzled... ;-) View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4129222#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...