在virtual User Generator里写的rmi脚本运行没有问题，一压就报错

ykjimmy

请高手给我指点以下，谢谢
报错
Error: System.err: java.lang.ExceptionInInitializerError         Error
Error: System.err: Caused by: java.lang.NullPointerException              Error
Error: java.lang.ExceptionInInitializerError
Error:         at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:141)
        at com.dc.eai.entry.rmi.ServiceEntryImpl_Stub.class$(Unknown Source)
        at com.dc.eai.entry.rmi.ServiceEntryImpl_Stub.<clinit>(Unknown Source)
        at sun.misc.Unsafe.ensureClassInitialized(Native Method)
        at sun.reflect.UnsafeFieldAccessorFactory.newFieldAccessor(UnsafeFieldAccessorFactory.java:20)
        at sun.reflect.ReflectionFactory.newFieldAccessor(ReflectionFactory.java:122)
        at java.lang.reflect.Field.acquireFieldAccessor(Field.java:779)
        at java.lang.reflect.Field.getFieldAccessor(Field.java:760)
        at java.lang.reflect.Field.getLong(Field.java:398)
        at java.io.ObjectStreamClass.getDeclaredSUID(ObjectStreamClass.java:1478)
        at java.io.ObjectStreamClass.access$400(ObjectStreamClass.java:47)
        at java.io.ObjectStreamClass$3.run(ObjectStreamClass.java:335)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.io.ObjectStreamClass.<init>(ObjectStreamClass.java:333)
        at java.io.ObjectStreamClass.lookup(ObjectStreamClass.java:253)
        at java.io.ObjectStreamClass.initNonProxy(ObjectStreamClass.java:453)
        at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1521)
        at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1435)
        at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1626)