I believe I can fly

最近在用SSH做一個軟件，在測試時，發(fā)現(xiàn)如果多刷新幾次頁面，提示Socket closed錯誤，貌似是連接丟失造成的，但是奇怪的是，過一段時間再刷新時，又正常了，再這樣刷幾次，又出同樣的問題。查了好多資料，實在搞不定了。不知哪位同仁遇到過同樣的問題，控制臺輸入如下：

2009-05-21 23:10:01,734 WARN [org.hibernate.util.JDBCExceptionReporter] - SQL Er
ror: 17002, SQLState: null
2009-05-21 23:10:01,734 ERROR [org.hibernate.util.JDBCExceptionReporter] - Io 異
常: Socket closed
2009-05-21 23:10:01,734 WARN [org.hibernate.util.JDBCExceptionReporter] - SQL Er
ror: 17002, SQLState: null
2009-05-21 23:10:01,734 ERROR [org.hibernate.util.JDBCExceptionReporter] - Io 異
常: Socket closed
org.hibernate.exception.GenericJDBCException: could not execute query
        at org.hibernate.exception.ErrorCodeConverter.handledNonSpecificExceptio
n(ErrorCodeConverter.java:92)
        at org.hibernate.exception.ErrorCodeConverter.convert(ErrorCodeConverter
.java:80)
        at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelp
er.java:43)
        at org.hibernate.loader.Loader.doList(Loader.java:1596)
        at org.hibernate.loader.Loader.list(Loader.java:1577)
        at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:395)
        at org.hibernate.hql.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.ja
va:271)
        at org.hibernate.impl.SessionImpl.list(SessionImpl.java:844)
        at org.hibernate.impl.QueryImpl.list(QueryImpl.java:74)
        at com.tkp.crm.dao.impl.ICustomerDAOImpl.queryAll(ICustomerDAOImpl.java:
22)
        at com.tkp.crm.struts.action.CustomerAction.listAll(CustomerAction.java:
59)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.
java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAcces
sorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:585)
        at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchActio
n.java:270)
        at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:
187)
        at org.apache.struts.action.RequestProcessor.processActionPerform(Reques
tProcessor.java:431)
        at org.apache.struts.action.RequestProcessor.process(RequestProcessor.ja
va:236)
        at org.apache.struts.action.ActionServlet.process(ActionServlet.java:119
6)
        at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:237)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:157)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDisp
atcher.java:704)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(Applica
tionDispatcher.java:474)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationD
ispatcher.java:409)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDis
patcher.java:312)
        at org.apache.jasper.runtime.PageContextImpl.doForward(PageContextImpl.j
ava:670)
        at org.apache.jasper.runtime.PageContextImpl.forward(PageContextImpl.jav
a:637)
        at org.apache.jsp.index_jsp._jspService(index_jsp.java:72)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper
.java:324)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:2
92)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:237)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:157)
        at org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.do
FilterInternal(OpenSessionInViewFilter.java:198)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerR
equestFilter.java:75)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:186)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:157)
        at com.tkp.crm.filter.EncodingFilter.doFilter(EncodingFilter.java:22)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Appl
icationFilterChain.java:186)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationF
ilterChain.java:157)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperV
alve.java:214)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
        at org.apache.catalina.core.StandardContextValve.invokeInternal(Standard
ContextValve.java:198)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextV
alve.java:152)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.j
ava:137)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.j
ava:118)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:102)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineVal
ve.java:109)
        at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValv
eContext.java:104)
        at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.jav
a:520)
        at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)

        at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:16
0)
        at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java
:799)
        at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.proce
ssConnection(Http11Protocol.java:705)
        at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java
:577)
        at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadP
ool.java:683)
        at java.lang.Thread.run(Thread.java:595)
Caused by: java.sql.SQLException: Io 異常: Socket closed
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:134)
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:179)
        at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:333)
        at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:389)
        at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:413)
        at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedState
ment.java:119)
        at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedState
ment.java:92)
        at oracle.jdbc.driver.OracleConnection.privatePrepareStatement(OracleCon
nection.java:950)
        at oracle.jdbc.driver.OracleConnection.prepareStatement(OracleConnection
.java:802)
        at org.apache.commons.dbcp.DelegatingConnection.prepareStatement(Delegat
ingConnection.java:248)
        at org.apache.commons.dbcp.PoolingDataSource$PoolGuardConnectionWrapper.
prepareStatement(PoolingDataSource.java:302)
        at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatch
er.java:396)
        at org.hibernate.jdbc.AbstractBatcher.getPreparedStatement(AbstractBatch
er.java:334)
        at org.hibernate.jdbc.AbstractBatcher.prepareQueryStatement(AbstractBatc
her.java:88)
        at org.hibernate.loader.Loader.prepareQueryStatement(Loader.java:1162)
        at org.hibernate.loader.Loader.doQuery(Loader.java:390)
        at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Lo
ader.java:218)
        at org.hibernate.loader.Loader.doList(Loader.java:1593)
         65 more
2009-05-21 23:10:05,015 WARN [org.hibernate.jdbc.ConnectionManager] - unclosed c
onnection, forgot to call close() on your session?