java.lang.reflect.UndeclaredThrowableException: This exception has no message.

java.sql.SQLException: Statement closed.	at org.apache.tomcat.jdbc.pool.interceptor.StatementDecoratorInterceptor$StatementProxy.invoke(StatementDecoratorInterceptor.java:238)	at com.sun.proxy.$Proxy39.hashCode(Unknown Source)	at java.util.HashMap.hash(HashMap.java:338)	at java.util.HashMap.get(HashMap.java:556)	at org.hibernate.resource.jdbc.internal.ResourceRegistryStandardImpl.release(ResourceRegistryStandardImpl.java:76)	at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.releaseStatements(AbstractBatchImpl.java:157)	at org.hibernate.engine.jdbc.batch.internal.AbstractBatchImpl.release(AbstractBatchImpl.java:195)	at org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl.close(JdbcCoordinatorImpl.java:190)	at org.hibernate.internal.SessionImpl.close(SessionImpl.java:424)	at com.xk72.hibernate.session.internal.AbstractHibernateSessionInvocationHandler.doClose(AbstractHibernateSessionInvocationHandler.java:230)	at com.xk72.hibernate.session.internal.AbstractHibernateSessionInvocationHandler.actuallyClose(AbstractHibernateSessionInvocationHandler.java:218)	at com.xk72.hibernate.session.internal.AbstractHibernateSessionInvocationHandler.invoke(AbstractHibernateSessionInvocationHandler.java:72)	at com.sun.proxy.$Proxy66.actuallyClose(Unknown Source)	at com.xk72.hibernate.session.internal.HibernateCurrentSessionProvider.completelyCloseCurrentSession(HibernateCurrentSessionProvider.java:157)	at com.xk72.hibernate.session.internal.StandardHibernateSessionProvider.completelyCloseCurrentSession(StandardHibernateSessionProvider.java:82)	at com.cactuslab.supermodel.utils.HibernateUtil.completelyCloseCurrentSession(HibernateUtil.java:65)	at com.cactuslab.supermodel.web.SupermodelRootActionContext.doRootAction(SupermodelRootActionContext.java:152)	at com.xk72.webparts.actions.ActionFilter.doFilter(ActionFilter.java:143)	at com.xk72.webparts.actions.ActionFilter.doFilter(ActionFilter.java:69)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at com.cactuslab.supermodel.web.SupermodelFilter.doFilter(SupermodelFilter.java:58)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at com.xk72.webparts.csrf.CSRFFilter.doFilter(CSRFFilter.java:93)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at com.xk72.webparts.multipart.MultipartHttpFilter.doFilter(MultipartHttpFilter.java:31)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at com.xk72.webparts.RequestCharacterEncodingFilter.doFilter(RequestCharacterEncodingFilter.java:30)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:505)	at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:436)	at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:190)	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:625)	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:745)