Issue with Tomcat 6.0.16 (I think?)
-----------------------------------

                 Key: TAPESTRY-2316
                 URL: https://issues.apache.org/jira/browse/TAPESTRY-2316
             Project: Tapestry
          Issue Type: Bug
    Affects Versions: 5.0.11
         Environment: Tomcat 6.0.16, Java 1.6.0_03, windows vista 64bit.
            Reporter: Ernest Monklitch
             Fix For: 5.0.12


I have no idea what might be causing this, but I have developed a new page that 
obviously does something very wrong. Thats my fault, but T5 just dies like the 
stack trace below shows. No real exception is reported etc. and the error 500 
is displayed.

This code snippet throws the exception. (TapestryModule:535) Thus even if the 
if clause evaluates as true, the next line generates the exception, atleast in 
tomcat version I use.
if (ex.getCause() == null)
                        ex.initCause(requestGlobals.getClassLoaderException());

Perhaps the solution would be to wrap this code with an another trycatch block. 
However if this fails I have no Idea what can be done in that last catch. Nicer 
exception page could be shown atleast.

30.3.2008 19:18:13 org.apache.catalina.core.StandardWrapperValve invoke
SEVERE: Servlet.service() for servlet default threw exception
java.lang.IllegalStateException: Can't overwrite cause
        at java.lang.Throwable.initCause(Throwable.java:320)
        at 
org.apache.tapestry.services.TapestryModule$2.service(TapestryModule.java:535)
        at $RequestHandler_11900797768.service($RequestHandler_11900797768.java)
        at 
org.apache.tapestry.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:79)
        at $RequestHandler_11900797768.service($RequestHandler_11900797768.java)
        at 
org.apache.tapestry.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:93)
        at 
org.apache.tapestry.internal.services.CheckForUpdatesFilter$2.invoke(CheckForUpdatesFilter.java:84)
        at 
org.apache.tapestry.ioc.internal.util.ConcurrentBarrier.withRead(ConcurrentBarrier.java:77)
        at 
org.apache.tapestry.internal.services.CheckForUpdatesFilter.service(CheckForUpdatesFilter.java:106)
        at $RequestHandler_11900797768.service($RequestHandler_11900797768.java)
        at $RequestHandler_1190079775e.service($RequestHandler_1190079775e.java)
        at 
org.apache.tapestry.services.TapestryModule$12.service(TapestryModule.java:924)
        at 
org.apache.tapestry.upload.internal.services.MultipartServletRequestFilter.service(MultipartServletRequestFilter.java:43)
        at 
$HttpServletRequestHandler_1190079775f.service($HttpServletRequestHandler_1190079775f.java)
        at 
org.apache.tapestry.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
        at 
$HttpServletRequestFilter_1190079775d.service($HttpServletRequestFilter_1190079775d.java)
        at 
$HttpServletRequestHandler_1190079775f.service($HttpServletRequestHandler_1190079775f.java)
        at 
$HttpServletRequestHandler_1190079775b.service($HttpServletRequestHandler_1190079775b.java)
        at org.apache.tapestry.TapestryFilter.doFilter(TapestryFilter.java:168)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)
        at 
org.acegisecurity.intercept.web.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:107)
        at 
org.acegisecurity.intercept.web.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:72)
        at 
org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
        at 
org.acegisecurity.ui.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:124)
        at 
org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
        at 
org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
        at 
org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
        at 
org.acegisecurity.ui.logout.LogoutFilter.doFilter(LogoutFilter.java:110)
        at 
org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
        at 
org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
        at 
org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)
        at 
org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)
        at 
org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:183)
        at 
org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:138)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.springframework.orm.hibernate3.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:198)
        at 
org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)
        at 
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
        at 
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
        at 
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
        at 
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:175)
        at 
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
        at 
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
        at 
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
        at 
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
        at 
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:844)
        at 
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
        at 
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
        at java.lang.Thread.run(Thread.java:619)


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