软件运行时错误 Hibernate

在以上错误信息的后面还有一些错误信息，罗列如下：Last packet sent to the server was 16 ms ago.
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2707)
        at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:2618)
        at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1551)
        at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:1665)
        at com.mysql.jdbc.Connection.execSQL(Connection.java:2978)
        at com.mysql.jdbc.Connection.execSQL(Connection.java:2902)
        at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.ja
va:930)
        at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:
1024)
        at net.sf.hibernate.impl.BatcherImpl.getResultSet(BatcherImpl.java:89)
        at net.sf.hibernate.loader.Loader.getResultSet(Loader.java:880)
        at net.sf.hibernate.loader.Loader.doQuery(Loader.java:273)
        at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections
(Loader.java:138)
        at net.sf.hibernate.loader.Loader.doList(Loader.java:1063)
        at net.sf.hibernate.loader.Loader.list(Loader.java:1054)
        at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:854)
        at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1554)
        at net.sf.hibernate.impl.QueryImpl.list(QueryImpl.java:49)
        at net.sf.hibernate.impl.AbstractQueryImpl.uniqueResult(AbstractQueryImp
l.java:550)
        at com.westchina.uhpp.util.ListHandler.uniqueResult(ListHandler.java:36)        at com.westchina.uhpp.util.Security.Login(Security.java:207)
        at com.westchina.uhpp.action.LoginAction.execute(LoginAction.java:28)
        at org.apache.struts.action.RequestProcessor.processActionPerform(Reques
tProcessor.java:484)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.ja
va:274)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:148
2)
        at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)        at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:284)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:204)
        at com.westchina.uhpp.util.PersistenceFilter.doFilter(PersistenceFilter.
java:25)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:233)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:204)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:256)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:151)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:563)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(Standard
ContextValve.java:245)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:199)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:151)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:563)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:195)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:151)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:164)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:149)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:563)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:156)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:151)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:563)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:972)        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:20
9)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:670)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:517)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java
:575)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:666)
        at java.lang.Thread.run(Thread.java:595)
** END NESTED EXCEPTION **
        at com.mysql.jdbc.Connection.checkClosed(Connection.java:1831)
        at com.mysql.jdbc.Connection.prepareStatement(Connection.java:4219)
        at com.mysql.jdbc.Connection.prepareStatement(Connection.java:4185)
        at net.sf.hibernate.impl.BatcherImpl.getPreparedStatement(BatcherImpl.ja
va:263)
        at net.sf.hibernate.impl.BatcherImpl.getPreparedStatement(BatcherImpl.ja
va:236)
        at net.sf.hibernate.impl.BatcherImpl.prepareQueryStatement(BatcherImpl.j
ava:67)
        at net.sf.hibernate.loader.Loader.prepareQueryStatement(Loader.java:784)        at net.sf.hibernate.loader.Loader.doQuery(Loader.java:269)
        at net.sf.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections
(Loader.java:138)
        at net.sf.hibernate.loader.Loader.doList(Loader.java:1063)
        at net.sf.hibernate.loader.Loader.list(Loader.java:1054)
        at net.sf.hibernate.hql.QueryTranslator.list(QueryTranslator.java:854)
        at net.sf.hibernate.impl.SessionImpl.find(SessionImpl.java:1554)
        ... 38 more