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org.hibernate.MappingException: Unknown entity: test.TestVO	at org.hibernate.impl.SessionFactoryImpl.getEntityPersister(SessionFactoryImpl.java:513)	at org.hibernate.impl.SessionImpl.getEntityPersister(SessionImpl.java:1321)	at org.hibernate.event.def.DefaultLockEventListener.onLock(DefaultLockEventListener.java:50)	at org.hibernate.impl.SessionImpl.fireLock(SessionImpl.java:608)	at org.hibernate.impl.SessionImpl.lock(SessionImpl.java:600)	at test.ServiceImpl.doSmth(ServiceImpl.java:59)	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:585)	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:287)	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:181)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:148)	at org.springframework.orm.hibernate3.HibernateInterceptor.invoke(HibernateInterceptor.java:97)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:170)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:176)	at $Proxy10.doSmth(Unknown Source)	at test.TestServlet.service(TestServlet.java:38)	at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)