org.hibernate.LazyInitializationException: could not initialize proxy 这是什么错

008-11-7 10:41:56 org.apache.catalina.core.ApplicationDispatcher invoke
严重: Servlet.service() for servlet action threw exception
org.hibernate.LazyInitializationException: could not initialize proxy - the owning Session was closed
at org.hibernate.proxy.AbstractLazyInitializer.initialize(AbstractLazyInitializer.java:60)
at org.hibernate.proxy.AbstractLazyInitializer.getImplementation(AbstractLazyInitializer.java:102)
at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.intercept(CGLIBLazyInitializer.java:160)
at com.syni.im800.model.AuthregVdn$$EnhancerByCGLIB$$f8c5bb63.getMaxAgent(<generated>)
at com.syni.im800.web.action.ForwardAction.accountStatus(ForwardAction.java:2890)
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:597)-----------------
AuthregVdn我这个pojo根本就和其他表没有关联，怎么会出现这个错误，也不需要再hbm设置什么lazy选项啊这是什么错误，我之前升级了hibernate3 从2升的