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java.lang.NoClassDefFoundError: net.jini.loader.pref.PreferredClassProvider at java.rmi.server.RMIClassLoader.initializeProvider(RMIClassLoader.java:687) at java.rmi.server.RMIClassLoader.access$000(RMIClassLoader.java:110) at java.rmi.server.RMIClassLoader$1.run(RMIClassLoader.java:120) at java.rmi.server.RMIClassLoader$1.run(RMIClassLoader.java:119) at java.security.AccessController.doPrivileged(Native Method) at java.rmi.server.RMIClassLoader.<clinit>(RMIClassLoader.java:117) at net.jini.loader.ClassLoading.loadClass(ClassLoading.java:138) at net.jini.io.MarshalInputStream.resolveClass(MarshalInputStream.java:296) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1612) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1517) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1771) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1350) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:370) at net.jini.io.MarshalledInstance.get(MarshalledInstance.java:358) at com.sun.jini.discovery.DiscoveryV1.doUnicastDiscovery(DiscoveryV1.java:397) at net.jini.discovery.LookupDiscovery$13.run(LookupDiscovery.java:3327) at java.security.AccessController.doPrivileged(Native Method) at net.jini.discovery.LookupDiscovery.doUnicastDiscovery(LookupDiscovery.java:3324) at net.jini.discovery.LookupDiscovery.doUnicastDiscovery(LookupDiscovery.java:3355) at net.jini.discovery.LookupDiscovery.access$3900(LookupDiscovery.java:696) at net.jini.discovery.LookupDiscovery$UnicastDiscoveryTask.run(LookupDiscovery.java:1744) at com.sun.jini.thread.TaskManager$TaskThread.run(TaskManager.java:331)