Problems with Back button on sample detail page (In portlet)

**garpinc2** · Apr 12th, 2005, 08:38 PM

If I search for a person and then select the detail for a person the Back button does nothing. I am running sample portlet. Does anyone have any ideas?

**klr8** · Apr 13th, 2005, 06:04 AM

Mmm, what Portlet container are you using? Also, turn on "INFO" level logging, that should provide some usefull insight.

Erwin

**garpinc2** · Apr 13th, 2005, 07:49 AM

I am using jetspeed2

The following stack trace occurs when back button is pressed

Code:

ERROR --- FrameworkPortlet.serviceWrapper&#40;399&#41; | Could not complete request
java.lang.ClassCastException
	at org.springframework.web.flow.execution.portlet.PortletRequestEvent.<init>&#40;PortletRequestEvent.java&#58;70&#41;
	at org.springframework.web.flow.execution.portlet.PortletRequestEvent.<init>&#40;PortletRequestEvent.java&#58;47&#41;
	at org.springframework.web.flow.execution.portlet.PortletFlowExecutionManager.createEvent&#40;PortletFlowExecutionManager.java&#58;111&#41;
	at org.springframework.web.flow.execution.portlet.PortletFlowExecutionManager.handle&#40;PortletFlowExecutionManager.java&#58;88&#41;
	at org.springframework.web.flow.portlet.PortletFlowController.handleRequestInternal&#40;PortletFlowController.java&#58;119&#41;
	at org.springframework.web.portlet.support.AbstractController.handleRequest&#40;AbstractController.java&#58;156&#41;
	at org.springframework.web.portlet.DispatcherPortlet.doActionService&#40;DispatcherPortlet.java&#58;338&#41;
	at org.springframework.web.portlet.FrameworkPortlet.serviceWrapper&#40;FrameworkPortlet.java&#58;374&#41;
	at org.springframework.web.portlet.FrameworkPortlet.processAction&#40;FrameworkPortlet.java&#58;358&#41;
	at org.apache.jetspeed.factory.JetspeedPortletInstance.processAction&#40;JetspeedPortletInstance.java&#58;90&#41;
	at org.apache.jetspeed.container.JetspeedContainerServlet.doGet&#40;JetspeedContainerServlet.java&#58;215&#41;
	at org.apache.jetspeed.container.JetspeedContainerServlet.doPost&#40;JetspeedContainerServlet.java&#58;289&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;709&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;802&#41;
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter&#40;ApplicationFilterChain.java&#58;252&#41;
	at org.apache.catalina.core.ApplicationFilterChain.doFilter&#40;ApplicationFilterChain.java&#58;173&#41;
	at org.apache.catalina.core.ApplicationDispatcher.invoke&#40;ApplicationDispatcher.java&#58;672&#41;
	at org.apache.catalina.core.ApplicationDispatcher.doInclude&#40;ApplicationDispatcher.java&#58;574&#41;
	at org.apache.catalina.core.ApplicationDispatcher.include&#40;ApplicationDispatcher.java&#58;499&#41;
	at org.apache.jetspeed.container.invoker.ServletPortletInvoker.invoke&#40;ServletPortletInvoker.java&#58;212&#41;
	at org.apache.jetspeed.container.invoker.ServletPortletInvoker.action&#40;ServletPortletInvoker.java&#58;133&#41;
	at sun.reflect.NativeMethodAccessorImpl.invoke0&#40;Native Method&#41;
	at sun.reflect.NativeMethodAccessorImpl.invoke&#40;NativeMethodAccessorImpl.java&#58;39&#41;
	at sun.reflect.DelegatingMethodAccessorImpl.invoke&#40;DelegatingMethodAccessorImpl.java&#58;25&#41;
	at java.lang.reflect.Method.invoke&#40;Method.java&#58;324&#41;
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection&#40;AopUtils.java&#58;284&#41;
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke&#40;JdkDynamicAopProxy.java&#58;163&#41;
	at $Proxy9.action&#40;Unknown Source&#41;
	at org.apache.pluto.PortletContainerImpl.processPortletAction&#40;PortletContainerImpl.java&#58;150&#41;
	at org.apache.jetspeed.container.JetspeedPortletContainerWrapper.processPortletAction&#40;JetspeedPortletContainerWrapper.java&#58;100&#41;
	at org.apache.jetspeed.pipeline.valve.impl.ActionValveImpl.invoke&#40;ActionValveImpl.java&#58;75&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.container.ContainerValve.invoke&#40;ContainerValve.java&#58;76&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.profiler.impl.ProfilerValveImpl.invoke&#40;ProfilerValveImpl.java&#58;133&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.security.impl.PasswordCredentialValveImpl.invoke&#40;PasswordCredentialValveImpl.java&#58;139&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.security.impl.AbstractSecurityValve$1.run&#40;AbstractSecurityValve.java&#58;117&#41;
	at java.security.AccessController.doPrivileged&#40;Native Method&#41;
	at javax.security.auth.Subject.doAsPrivileged&#40;Subject.java&#58;437&#41;
	at org.apache.jetspeed.security.impl.AbstractSecurityValve.invoke&#40;AbstractSecurityValve.java&#58;111&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.container.url.impl.PortalURLValveImpl.invoke&#40;PortalURLValveImpl.java&#58;55&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.capabilities.impl.CapabilityValveImpl.invoke&#40;CapabilityValveImpl.java&#58;127&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.localization.impl.LocalizationValveImpl.invoke&#40;LocalizationValveImpl.java&#58;124&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invoke&#40;JetspeedPipeline.java&#58;185&#41;
	at org.apache.jetspeed.engine.AbstractEngine.service&#40;AbstractEngine.java&#58;264&#41;
	at org.apache.jetspeed.engine.JetspeedServlet.doGet&#40;JetspeedServlet.java&#58;225&#41;
	at org.apache.jetspeed.engine.JetspeedServlet.doPost&#40;JetspeedServlet.java&#58;252&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;709&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;802&#41;
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter&#40;ApplicationFilterChain.java&#58;252&#41;
	at org.apache.catalina.core.ApplicationFilterChain.doFilter&#40;ApplicationFilterChain.java&#58;173&#41;
	at org.apache.catalina.core.StandardWrapperValve.invoke&#40;StandardWrapperValve.java&#58;213&#41;
	at org.apache.catalina.core.StandardContextValve.invoke&#40;StandardContextValve.java&#58;178&#41;
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke&#40;AuthenticatorBase.java&#58;407&#41;
	at org.apache.catalina.core.StandardHostValve.invoke&#40;StandardHostValve.java&#58;126&#41;
	at org.apache.catalina.valves.ErrorReportValve.invoke&#40;ErrorReportValve.java&#58;105&#41;
	at org.apache.catalina.core.StandardEngineValve.invoke&#40;StandardEngineValve.java&#58;107&#41;
	at org.apache.catalina.connector.CoyoteAdapter.service&#40;CoyoteAdapter.java&#58;148&#41;
	at org.apache.coyote.http11.Http11Processor.process&#40;Http11Processor.java&#58;825&#41;
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection&#40;Http11Protocol.java&#58;743&#41;
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket&#40;PoolTcpEndpoint.java&#58;527&#41;
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt&#40;LeaderFollowerWorkerThread.java&#58;80&#41;
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run&#40;ThreadPool.java&#58;684&#41;
	at java.lang.Thread.run&#40;Thread.java&#58;534&#41;
ERROR --- ApplicationContext.log&#40;662&#41; | JetspeedContainerServlet&#58; Error rendering portlet "null"&#58; java.lang.ClassCastException
java.lang.ClassCastException
	at org.springframework.web.flow.execution.portlet.PortletRequestEvent.<init>&#40;PortletRequestEvent.java&#58;70&#41;
	at org.springframework.web.flow.execution.portlet.PortletRequestEvent.<init>&#40;PortletRequestEvent.java&#58;47&#41;
	at org.springframework.web.flow.execution.portlet.PortletFlowExecutionManager.createEvent&#40;PortletFlowExecutionManager.java&#58;111&#41;
	at org.springframework.web.flow.execution.portlet.PortletFlowExecutionManager.handle&#40;PortletFlowExecutionManager.java&#58;88&#41;
	at org.springframework.web.flow.portlet.PortletFlowController.handleRequestInternal&#40;PortletFlowController.java&#58;119&#41;
	at org.springframework.web.portlet.support.AbstractController.handleRequest&#40;AbstractController.java&#58;156&#41;
	at org.springframework.web.portlet.DispatcherPortlet.doActionService&#40;DispatcherPortlet.java&#58;338&#41;
	at org.springframework.web.portlet.FrameworkPortlet.serviceWrapper&#40;FrameworkPortlet.java&#58;374&#41;
	at org.springframework.web.portlet.FrameworkPortlet.processAction&#40;FrameworkPortlet.java&#58;358&#41;
	at org.apache.jetspeed.factory.JetspeedPortletInstance.processAction&#40;JetspeedPortletInstance.java&#58;90&#41;
	at org.apache.jetspeed.container.JetspeedContainerServlet.doGet&#40;JetspeedContainerServlet.java&#58;215&#41;
	at org.apache.jetspeed.container.JetspeedContainerServlet.doPost&#40;JetspeedContainerServlet.java&#58;289&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;709&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;802&#41;
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter&#40;ApplicationFilterChain.java&#58;252&#41;
	at org.apache.catalina.core.ApplicationFilterChain.doFilter&#40;ApplicationFilterChain.java&#58;173&#41;
	at org.apache.catalina.core.ApplicationDispatcher.invoke&#40;ApplicationDispatcher.java&#58;672&#41;
	at org.apache.catalina.core.ApplicationDispatcher.doInclude&#40;ApplicationDispatcher.java&#58;574&#41;
	at org.apache.catalina.core.ApplicationDispatcher.include&#40;ApplicationDispatcher.java&#58;499&#41;
	at org.apache.jetspeed.container.invoker.ServletPortletInvoker.invoke&#40;ServletPortletInvoker.java&#58;212&#41;
	at org.apache.jetspeed.container.invoker.ServletPortletInvoker.action&#40;ServletPortletInvoker.java&#58;133&#41;
	at sun.reflect.NativeMethodAccessorImpl.invoke0&#40;Native Method&#41;
	at sun.reflect.NativeMethodAccessorImpl.invoke&#40;NativeMethodAccessorImpl.java&#58;39&#41;
	at sun.reflect.DelegatingMethodAccessorImpl.invoke&#40;DelegatingMethodAccessorImpl.java&#58;25&#41;
	at java.lang.reflect.Method.invoke&#40;Method.java&#58;324&#41;
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection&#40;AopUtils.java&#58;284&#41;
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke&#40;JdkDynamicAopProxy.java&#58;163&#41;
	at $Proxy9.action&#40;Unknown Source&#41;
	at org.apache.pluto.PortletContainerImpl.processPortletAction&#40;PortletContainerImpl.java&#58;150&#41;
	at org.apache.jetspeed.container.JetspeedPortletContainerWrapper.processPortletAction&#40;JetspeedPortletContainerWrapper.java&#58;100&#41;
	at org.apache.jetspeed.pipeline.valve.impl.ActionValveImpl.invoke&#40;ActionValveImpl.java&#58;75&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.container.ContainerValve.invoke&#40;ContainerValve.java&#58;76&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.profiler.impl.ProfilerValveImpl.invoke&#40;ProfilerValveImpl.java&#58;133&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.security.impl.PasswordCredentialValveImpl.invoke&#40;PasswordCredentialValveImpl.java&#58;139&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.security.impl.AbstractSecurityValve$1.run&#40;AbstractSecurityValve.java&#58;117&#41;
	at java.security.AccessController.doPrivileged&#40;Native Method&#41;
	at javax.security.auth.Subject.doAsPrivileged&#40;Subject.java&#58;437&#41;
	at org.apache.jetspeed.security.impl.AbstractSecurityValve.invoke&#40;AbstractSecurityValve.java&#58;111&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.container.url.impl.PortalURLValveImpl.invoke&#40;PortalURLValveImpl.java&#58;55&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.capabilities.impl.CapabilityValveImpl.invoke&#40;CapabilityValveImpl.java&#58;127&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.localization.impl.LocalizationValveImpl.invoke&#40;LocalizationValveImpl.java&#58;124&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invoke&#40;JetspeedPipeline.java&#58;185&#41;
	at org.apache.jetspeed.engine.AbstractEngine.service&#40;AbstractEngine.java&#58;264&#41;
	at org.apache.jetspeed.engine.JetspeedServlet.doGet&#40;JetspeedServlet.java&#58;225&#41;
	at org.apache.jetspeed.engine.JetspeedServlet.doPost&#40;JetspeedServlet.java&#58;252&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;709&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;802&#41;
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter&#40;ApplicationFilterChain.java&#58;252&#41;
	at org.apache.catalina.core.ApplicationFilterChain.doFilter&#40;ApplicationFilterChain.java&#58;173&#41;
	at org.apache.catalina.core.StandardWrapperValve.invoke&#40;StandardWrapperValve.java&#58;213&#41;
	at org.apache.catalina.core.StandardContextValve.invoke&#40;StandardContextValve.java&#58;178&#41;
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke&#40;AuthenticatorBase.java&#58;407&#41;
	at org.apache.catalina.core.StandardHostValve.invoke&#40;StandardHostValve.java&#58;126&#41;
	at org.apache.catalina.valves.ErrorReportValve.invoke&#40;ErrorReportValve.java&#58;105&#41;
	at org.apache.catalina.core.StandardEngineValve.invoke&#40;StandardEngineValve.java&#58;107&#41;
	at org.apache.catalina.connector.CoyoteAdapter.service&#40;CoyoteAdapter.java&#58;148&#41;
	at org.apache.coyote.http11.Http11Processor.process&#40;Http11Processor.java&#58;825&#41;
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection&#40;Http11Protocol.java&#58;743&#41;
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket&#40;PoolTcpEndpoint.java&#58;527&#41;
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt&#40;LeaderFollowerWorkerThread.java&#58;80&#41;
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run&#40;ThreadPool.java&#58;684&#41;
	at java.lang.Thread.run&#40;Thread.java&#58;534&#41;
java.lang.ClassCastException
	at org.springframework.web.flow.execution.portlet.PortletRequestEvent.<init>&#40;PortletRequestEvent.java&#58;70&#41;
	at org.springframework.web.flow.execution.portlet.PortletRequestEvent.<init>&#40;PortletRequestEvent.java&#58;47&#41;
	at org.springframework.web.flow.execution.portlet.PortletFlowExecutionManager.createEvent&#40;PortletFlowExecutionManager.java&#58;111&#41;
	at org.springframework.web.flow.execution.portlet.PortletFlowExecutionManager.handle&#40;PortletFlowExecutionManager.java&#58;88&#41;
	at org.springframework.web.flow.portlet.PortletFlowController.handleRequestInternal&#40;PortletFlowController.java&#58;119&#41;
	at org.springframework.web.portlet.support.AbstractController.handleRequest&#40;AbstractController.java&#58;156&#41;
	at org.springframework.web.portlet.DispatcherPortlet.doActionService&#40;DispatcherPortlet.java&#58;338&#41;
	at org.springframework.web.portlet.FrameworkPortlet.serviceWrapper&#40;FrameworkPortlet.java&#58;374&#41;
	at org.springframework.web.portlet.FrameworkPortlet.processAction&#40;FrameworkPortlet.java&#58;358&#41;
	at org.apache.jetspeed.factory.JetspeedPortletInstance.processAction&#40;JetspeedPortletInstance.java&#58;90&#41;
	at org.apache.jetspeed.container.JetspeedContainerServlet.doGet&#40;JetspeedContainerServlet.java&#58;215&#41;
	at org.apache.jetspeed.container.JetspeedContainerServlet.doPost&#40;JetspeedContainerServlet.java&#58;289&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;709&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;802&#41;
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter&#40;ApplicationFilterChain.java&#58;252&#41;
	at org.apache.catalina.core.ApplicationFilterChain.doFilter&#40;ApplicationFilterChain.java&#58;173&#41;
	at org.apache.catalina.core.ApplicationDispatcher.invoke&#40;ApplicationDispatcher.java&#58;672&#41;
	at org.apache.catalina.core.ApplicationDispatcher.doInclude&#40;ApplicationDispatcher.java&#58;574&#41;
	at org.apache.catalina.core.ApplicationDispatcher.include&#40;ApplicationDispatcher.java&#58;499&#41;
	at org.apache.jetspeed.container.invoker.ServletPortletInvoker.invoke&#40;ServletPortletInvoker.java&#58;212&#41;
	at org.apache.jetspeed.container.invoker.ServletPortletInvoker.action&#40;ServletPortletInvoker.java&#58;133&#41;
	at sun.reflect.NativeMethodAccessorImpl.invoke0&#40;Native Method&#41;
	at sun.reflect.NativeMethodAccessorImpl.invoke&#40;NativeMethodAccessorImpl.java&#58;39&#41;
	at sun.reflect.DelegatingMethodAccessorImpl.invoke&#40;DelegatingMethodAccessorImpl.java&#58;25&#41;
	at java.lang.reflect.Method.invoke&#40;Method.java&#58;324&#41;
	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection&#40;AopUtils.java&#58;284&#41;
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke&#40;JdkDynamicAopProxy.java&#58;163&#41;
	at $Proxy9.action&#40;Unknown Source&#41;
	at org.apache.pluto.PortletContainerImpl.processPortletAction&#40;PortletContainerImpl.java&#58;150&#41;
	at org.apache.jetspeed.container.JetspeedPortletContainerWrapper.processPortletAction&#40;JetspeedPortletContainerWrapper.java&#58;100&#41;
	at org.apache.jetspeed.pipeline.valve.impl.ActionValveImpl.invoke&#40;ActionValveImpl.java&#58;75&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.container.ContainerValve.invoke&#40;ContainerValve.java&#58;76&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.profiler.impl.ProfilerValveImpl.invoke&#40;ProfilerValveImpl.java&#58;133&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.security.impl.PasswordCredentialValveImpl.invoke&#40;PasswordCredentialValveImpl.java&#58;139&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.security.impl.AbstractSecurityValve$1.run&#40;AbstractSecurityValve.java&#58;117&#41;
	at java.security.AccessController.doPrivileged&#40;Native Method&#41;
	at javax.security.auth.Subject.doAsPrivileged&#40;Subject.java&#58;437&#41;
	at org.apache.jetspeed.security.impl.AbstractSecurityValve.invoke&#40;AbstractSecurityValve.java&#58;111&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.container.url.impl.PortalURLValveImpl.invoke&#40;PortalURLValveImpl.java&#58;55&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.capabilities.impl.CapabilityValveImpl.invoke&#40;CapabilityValveImpl.java&#58;127&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.localization.impl.LocalizationValveImpl.invoke&#40;LocalizationValveImpl.java&#58;124&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invokeNext&#40;JetspeedPipeline.java&#58;203&#41;
	at org.apache.jetspeed.pipeline.JetspeedPipeline.invoke&#40;JetspeedPipeline.java&#58;185&#41;
	at org.apache.jetspeed.engine.AbstractEngine.service&#40;AbstractEngine.java&#58;264&#41;
	at org.apache.jetspeed.engine.JetspeedServlet.doGet&#40;JetspeedServlet.java&#58;225&#41;
	at org.apache.jetspeed.engine.JetspeedServlet.doPost&#40;JetspeedServlet.java&#58;252&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;709&#41;
	at javax.servlet.http.HttpServlet.service&#40;HttpServlet.java&#58;802&#41;
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter&#40;ApplicationFilterChain.java&#58;252&#41;
	at org.apache.catalina.core.ApplicationFilterChain.doFilter&#40;ApplicationFilterChain.java&#58;173&#41;
	at org.apache.catalina.core.StandardWrapperValve.invoke&#40;StandardWrapperValve.java&#58;213&#41;
	at org.apache.catalina.core.StandardContextValve.invoke&#40;StandardContextValve.java&#58;178&#41;
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke&#40;AuthenticatorBase.java&#58;407&#41;
	at org.apache.catalina.core.StandardHostValve.invoke&#40;StandardHostValve.java&#58;126&#41;
	at org.apache.catalina.valves.ErrorReportValve.invoke&#40;ErrorReportValve.java&#58;105&#41;
	at org.apache.catalina.core.StandardEngineValve.invoke&#40;StandardEngineValve.java&#58;107&#41;
	at org.apache.catalina.connector.CoyoteAdapter.service&#40;CoyoteAdapter.java&#58;148&#41;
	at org.apache.coyote.http11.Http11Processor.process&#40;Http11Processor.java&#58;825&#41;
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection&#40;Http11Protocol.java&#58;743&#41;
	at org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket&#40;PoolTcpEndpoint.java&#58;527&#41;
	at org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt&#40;LeaderFollowerWorkerThread.java&#58;80&#41;
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run&#40;ThreadPool.java&#58;684&#41;
	at java.lang.Thread.run&#40;Thread.java&#58;534&#41;

**garpinc2** · Apr 13th, 2005, 08:09 AM

looks to me that

searchForParameter(eventIdParameterName, parameterValueDelimiter)

returns String[] = {"back","select"}

but code is:

// TODO multipart portlet request support -- not yet supported by Spring Portlet MVC
String eventId = (String)searchForParameter(eventIdParameterName, parameterValueDelimiter);

What's the problem here?

Is that what the comment means?

**klr8** · Apr 13th, 2005, 02:40 PM

The comment does not relate to this, it regards file upload, which does not happen in the PhoneBook sample.
You are right that the result of searchForParameter() is apparently not a String. Did you verify that it was a String[] with "back" and "select" in it?

I checked the /WEB-INF/jsp/portlet/person.Detail.view.jsp, and as far as I can see the value of _eventId should be either "back" or "select", but not both.

Maybe this is a bug in Jetspeed2?

Could you try to verify what is returned by the searchForParameter() call?

Erwin

**garpinc2** · Apr 13th, 2005, 02:56 PM

I did verify {"back","select"}. If it's a bug in jetspeed how can I confim. I can work with you over IM to put the relavent breakpoints in the debugger. Let me know and we can arrange it.

**klr8** · Apr 13th, 2005, 03:01 PM

Well, the code is working nicely in Liferay.
Also, we're submitting the form

Code:

<FORM method="post" name="backForm" action="<portlet&#58;actionURL />">
    <INPUT type="hidden" name="_flowId" value="person.Detail" />
    <INPUT type="hidden" name="_flowExecutionId" value="<%=request.getAttribute&#40;"flowExecutionId"&#41; %>" />
    <INPUT type="hidden" name="_eventId" value="back" />
</FORM>

So as far as I can see there is no way a second value can get into the _eventId, right?!?!

I'd say: put a breakpoint in the constructor of the PortletRequestEvent, and trace trough it to see where this second value is coming from. Maybe the PortletUtils.getParametersStartingWith() has a bug?

Erwin

**garpinc2** · Apr 13th, 2005, 03:10 PM

the parameters are encoded when the link is encoded so yes there is a way for the parameter to get into the request. i.e: in jetspeed the url generated is:

<FORM method="post" name="backForm" action="http://localhost:8080/jetspeed/portal/_ns:YmRwLTIxfGMwfGQw/">

The ns contains the some stuff about state and parameters so that's how stuff could get into the next request.

I have found:

PortletUtils.getParametersStartingWith(request, null)

has a _eventId with a String[] = {"back","select"}

In PortletUtils

String[] values = request.getParameterValues(paramName);

returns the 2 values

so that's where it is coming from. Any ideas?

**klr8** · Apr 13th, 2005, 03:28 PM

Since PortletUtils.getParametersStartingWith() just uses the PortletRequest to get to the parameters, it seems like a Jetspeed2 bug, since they are the one implementing the PortletRequest interface.

I suggest you post the issue to the Jetspeed user/developer list.

Erwin

**garpinc2** · Apr 13th, 2005, 03:46 PM

Doesn't that seem too fundemental to be a jetspeed bug. At some point encoding of the form url occured. Was that jetspeed as well. Is the problem that somewhere select should have been removed from the request attributes and not reach the render. Maybe the change J. Enrique made to carry the attribute from action to render broke it or something.

If you don't think that is that case what do you think would be the best way to present the issue on jetspeed forum?

Thread: Problems with Back button on sample detail page (In portlet)

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Problems with Back button on sample detail page (In portlet)

Here is stack trace

Analysis of classcast

I did verify

actually

Doesn't that seem too fundemental to be a jetspeed bug

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