[Wicket-user] java.io.NotSerializableException: org.apache.tomcat.dbcp.dbcp.Poo lingDataSource$PoolGuardConnectionWrapper

[Mohan . P]

Hi,    I am new for Wicket framework. I am developing a web application using Wicket. My problem is when I fetch the data from data base by using data source in Tomcat5.x, I got all data from data base. after that the display page its throwing an exception.   Please reply to me. Wicket Message: Internal error cloning object. Make sure all dependent objects implement Serializable. Class: com.tsystems.bamview.web.report.CallsTotal Root cause: java.io.NotSerializableException: org.apache.tomcat.dbcp.dbcp.PoolingDataSource$PoolGuardConnectionWrapper      at java.io.ObjectOutputStream.writeObject0(Unknown Source)      at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)      at java.io.ObjectOutputStream.writeSerialData(Unknown Source)      at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)      at java.io.ObjectOutputStream.writeObject0(Unknown Source)      at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)      at java.io.ObjectOutputStream.writeSerialData(Unknown Source)      at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)      at java.io.ObjectOutputStream.writeObject0(Unknown Source)      at java.io.ObjectOutputStream.writeObject(Unknown Source)      at wicket.protocol.http.HttpSessionStore.setAttribute(HttpSessionStore.java:56)      at wicket.Session.setAttribute(Session.java:914)      at wicket.PageMap.put(PageMap.java:519)      at wicket.Session.touch(Session.java:720)      at wicket.Page.renderPage(Page.java:422)      at wicket.request.target.component.BookmarkablePageRequestTarget.respond(BookmarkablePageRequestTarget.java:224)      at wicket.request.compound.DefaultResponseStrategy.respond(DefaultResponseStrategy.java:49)      at wicket.request.compound.AbstractCompoundRequestCycleProcessor.respond(AbstractCompoundRequestCycleProcessor.java:66)      at wicket.RequestCycle.doProcessEventsAndRespond(RequestCycle.java:852)      at wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:879)      at wicket.RequestCycle.step(RequestCycle.java:960)      at wicket.RequestCycle.steps(RequestCycle.java:1034)      at wicket.RequestCycle.request(RequestCycle.java:453)      at wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:215)      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(ApplicationFilterChain.java:252)      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)      at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)      at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)      at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)      at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)      at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)      at java.lang.Thread.run(Unknown Source) Complete stack: wicket.WicketRuntimeException: Internal error cloning object. Make sure all dependent objects implement Serializable. Class: com.tsystems.bamview.web.report.CallsTotal      at wicket.protocol.http.HttpSessionStore.setAttribute(HttpSessionStore.java:62)      at wicket.Session.setAttribute(Session.java:914)      at wicket.PageMap.put(PageMap.java:519)      at wicket.Session.touch(Session.java:720)      at wicket.Page.renderPage(Page.java:422)      at wicket.request.target.component.BookmarkablePageRequestTarget.respond(BookmarkablePageRequestTarget.java:224)      at wicket.request.compound.DefaultResponseStrategy.respond(DefaultResponseStrategy.java:49)      at wicket.request.compound.AbstractCompoundRequestCycleProcessor.respond(AbstractCompoundRequestCycleProcessor.java:66)      at wicket.RequestCycle.doProcessEventsAndRespond(RequestCycle.java:852)      at wicket.RequestCycle.processEventsAndRespond(RequestCycle.java:879)      at wicket.RequestCycle.step(RequestCycle.java:960)      at wicket.RequestCycle.steps(RequestCycle.java:1034)      at wicket.RequestCycle.request(RequestCycle.java:453)      at wicket.protocol.http.WicketServlet.doGet(WicketServlet.java:215)       Thanks and Regards  Mohan P