Hard to say. JIRA will help me look at it closer when I have more time.
On 1/30/07, Robert J. Walker <[EMAIL PROTECTED]> wrote:
I've run into an interesting issue with a page that worked in Tapestry 3.1 that
now has a problem in Tapestry 4.1. The first time I arrive at a page via a
DirectLink that has a contrib:Table on it, it works fine, but if I click the
back button and then link to the page again, it complains of a
NullPointerException while trying to read the OGNL expression
tableColumnIterator on line 51 of TableColumns.jwc. Interestingly, this
*doesn't* happen if you turn off page caching.
java.lang.NullPointerException
Stack Trace:
*
org.apache.tapestry.contrib.table.components.AbstractTableViewComponent.getTableModelSource(AbstractTableViewComponent.java:35)
*
org.apache.tapestry.contrib.table.components.TableColumns.getTableColumnIterator(TableColumns.java:95)
* sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
*
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
*
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
* java.lang.reflect.Method.invoke(Method.java:585)
* ognl.OgnlRuntime.invokeMethod(OgnlRuntime.java:491)
* ognl.OgnlRuntime.getMethodValue(OgnlRuntime.java:904)
*
ognl.ObjectPropertyAccessor.getPossibleProperty(ObjectPropertyAccessor.java:54)
* ognl.ObjectPropertyAccessor.getProperty(ObjectPropertyAccessor.java:122)
* ognl.OgnlRuntime.getProperty(OgnlRuntime.java:1616)
* ognl.ASTProperty.getValueBody(ASTProperty.java:96)
* ognl.SimpleNode.evaluateGetValueBody(SimpleNode.java:170)
* ognl.SimpleNode.getValue(SimpleNode.java:210)
* ognl.Ognl.getValue(Ognl.java:333)
* ognl.Ognl.getValue(Ognl.java:310)
*
org.apache.tapestry.services.impl.ExpressionEvaluatorImpl.readCompiled(ExpressionEvaluatorImpl.java:102)
*
$ExpressionEvaluator_1107562b92d.readCompiled($ExpressionEvaluator_1107562b92d.java)
*
org.apache.tapestry.binding.ExpressionBinding.resolveExpression(ExpressionBinding.java:110)
*
org.apache.tapestry.binding.ExpressionBinding.getObject(ExpressionBinding.java:103)
*
org.apache.tapestry.components.ForBean.evaluateSourceIterator(ForBean.java:603)
* org.apache.tapestry.components.ForBean.getData(ForBean.java:252)
* org.apache.tapestry.components.ForBean.renderComponent(ForBean.java:107)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:92)
*
org.apache.tapestry.contrib.table.components.TableColumns.renderComponent(TableColumns.java:145)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
* org.apache.tapestry.components.Any.renderComponent(Any.java:50)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
*
org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:41)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
* org.apache.tapestry.components.Any.renderComponent(Any.java:50)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:92)
*
org.apache.tapestry.contrib.table.components.TableView.renderComponent(TableView.java:524)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:92)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
*
org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:41)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
* org.apache.tapestry.components.Any.renderComponent(Any.java:50)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:92)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
* org.apache.tapestry.components.IfBean.renderComponent(IfBean.java:86)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
* org.apache.tapestry.form.FormSupportImpl.render(FormSupportImpl.java:495)
* org.apache.tapestry.form.Form.renderComponent(Form.java:219)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
*
org.apache.tapestry.components.RenderBody.renderComponent(RenderBody.java:41)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
* org.apache.tapestry.components.Any.renderComponent(Any.java:50)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
* org.apache.tapestry.components.Any.renderComponent(Any.java:50)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
* org.apache.tapestry.html.Body.renderComponent(Body.java:160)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
*
org.apache.tapestry.AbstractComponent.renderBody(AbstractComponent.java:491)
* org.apache.tapestry.html.Shell.renderComponent(Shell.java:123)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:92)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:131)
* org.apache.tapestry.BaseComponent.renderComponent(BaseComponent.java:92)
* org.apache.tapestry.AbstractComponent.render(AbstractComponent.java:674)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.render(DefaultResponseBuilder.java:129)
* org.apache.tapestry.AbstractPage.renderPage(AbstractPage.java:250)
* org.apache.tapestry.engine.RequestCycle.renderPage(RequestCycle.java:338)
*
org.apache.tapestry.services.impl.DefaultResponseBuilder.renderResponse(DefaultResponseBuilder.java:117)
*
org.apache.tapestry.services.impl.ResponseRendererImpl.renderResponse(ResponseRendererImpl.java:33)
*
$ResponseRenderer_1107562b827.renderResponse($ResponseRenderer_1107562b827.java)
* org.apache.tapestry.engine.DirectService.service(DirectService.java:150)
* $IEngineService_1107562b893.service($IEngineService_1107562b893.java)
*
org.apache.tapestry.services.impl.EngineServiceOuterProxy.service(EngineServiceOuterProxy.java:72)
* org.apache.tapestry.engine.AbstractEngine.service(AbstractEngine.java:241)
*
org.apache.tapestry.services.impl.InvokeEngineTerminator.service(InvokeEngineTerminator.java:60)
*
$WebRequestServicer_1107562b86f.service($WebRequestServicer_1107562b86f.java)
*
$WebRequestServicer_1107562b86b.service($WebRequestServicer_1107562b86b.java)
*
org.apache.tapestry.services.impl.WebRequestServicerPipelineBridge.service(WebRequestServicerPipelineBridge.java:56)
*
$ServletRequestServicer_1107562b851.service($ServletRequestServicer_1107562b851.java)
*
org.apache.tapestry.request.DecodedRequestInjector.service(DecodedRequestInjector.java:55)
*
$ServletRequestServicerFilter_1107562b84d.service($ServletRequestServicerFilter_1107562b84d.java)
*
$ServletRequestServicer_1107562b853.service($ServletRequestServicer_1107562b853.java)
*
org.apache.tapestry.multipart.MultipartDecoderFilter.service(MultipartDecoderFilter.java:52)
*
$ServletRequestServicerFilter_1107562b84b.service($ServletRequestServicerFilter_1107562b84b.java)
*
$ServletRequestServicer_1107562b853.service($ServletRequestServicer_1107562b853.java)
*
org.apache.tapestry.services.impl.SetupRequestEncoding.service(SetupRequestEncoding.java:53)
*
$ServletRequestServicerFilter_1107562b84f.service($ServletRequestServicerFilter_1107562b84f.java)
*
$ServletRequestServicer_1107562b853.service($ServletRequestServicer_1107562b853.java)
*
$ServletRequestServicer_1107562b845.service($ServletRequestServicer_1107562b845.java)
*
org.apache.tapestry.ApplicationServlet.doService(ApplicationServlet.java:123)
* org.apache.tapestry.ApplicationServlet.doGet(ApplicationServlet.java:104)
* javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
* javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
*
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
*
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
*
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:174)
*
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:77)
*
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:202)
*
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
*
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:213)
*
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:178)
*
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:126)
*
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:105)
*
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:107)
*
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:148)
* org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:856)
*
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:744)
*
org.apache.tomcat.util.net.PoolTcpEndpoint.processSocket(PoolTcpEndpoint.java:527)
*
org.apache.tomcat.util.net.LeaderFollowerWorkerThread.runIt(LeaderFollowerWorkerThread.java:80)
*
org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
* java.lang.Thread.run(Thread.java:595)
Looking at line 35 of AbstractTableViewComponent seems to indicate that the
request cycle is null, which seems odd to me considering that the RequestCycle
class itself is further up the call stack. Any ideas as to what's going on here?
Robert J. Walker
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--
Jesse Kuhnert
Tapestry/Dojo team member/developer
Open source based consulting work centered around
dojo/tapestry/tacos/hivemind. http://blog.opencomponentry.com
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