jboss-4.0.3SP1 LinkageError loader constraint violation

java.lang.LinkageError: loader constraint violation: loader (instance of org/jboss/web/tomcat/tc5/WebAppClassLoader) previously initiated loading for a different type with name "xyz/xyz/xyz/xyz/GateAuthorisationManagerRemote" at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:621) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:124) at org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1815) at org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:869) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1322) at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1201) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320) at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:2427) at java.lang.Class.getDeclaredMethod(Class.java:1935) at java.io.ObjectStreamClass.getPrivateMethod(ObjectStreamClass.java:1382) at java.io.ObjectStreamClass.access$1700(ObjectStreamClass.java:52) at java.io.ObjectStreamClass$2.run(ObjectStreamClass.java:438) at java.security.AccessController.doPrivileged(Native Method) at java.io.ObjectStreamClass.(ObjectStreamClass.java:413) at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:310) at java.io.ObjectSt开发者_高级运维reamClass.initProxy(ObjectStreamClass.java:507) at java.io.ObjectInputStream.readProxyDesc(ObjectInputStream.java:1539) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1493) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1732) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1329) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:351) at java.rmi.MarshalledObject.get(MarshalledObject.java:142) at org.jnp.interfaces.MarshalledValuePair.get(MarshalledValuePair.java:72) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:652) at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:587) at javax.naming.InitialContext.lookup(InitialContext.java:392) at yes.util.Lookup.multiSiteLookup(Lookup.java:264) at yes.util.Lookup.getEJB(Lookup.java:313) at yes.util.Lookup.getEJB(Lookup.java:342) at .... .. ..

I was googling a lot and didn't found any anwer that could solve my problem. I checked that the class WebAppClassLoader is in two jars: catalina.jar and tomcat55-service.jar. I think that it's the problem, but i cannot remove any of this jars because app won't start at all. In WEB-INF/lib i don't have any jars. Can anybody help me please ?

This Exception generally caught whenever we are using EJB,

The Solution of the above problem is that this particular (GateAuthorisationManagerRemote) class remove from multiple jar and war . class file exist in multiple jar or war file, so we have to remove multiple existence of this classes and only keep one existence of this class .