[TAPESTRY-2468] A deadlock related to class loading (and creation) can occur

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 5.0.11
• Fix Version/s: 5.0.14
• Component/s: tapestry-ioc
• Assignee: Howard Lewis Ship
• Reporter: jens breitenstein
• Created: 19/Jun/08 23:38
• Updated: 13/Aug/08 18:34
• Resolved: 20/Jun/08 18:29

Description

Hi All!

We encountered a deadlock situation using T5.0.11 under heavy load. Unfortunately we do not have the detailed knowledge about all T5/javassist-secrets to solve this on our own.
It seems there are two different execution paths resulting in a call to "ClassPool.toClass". In both cases the inner class org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl$PackageAwareLoader is part of the deadlock.
On the one hand we have a call to "findClass(ComponentInstantiatorSourceImpl.java:75)" (please see "catalina-40.txt") on the other hand the toClass2 method tries to access this inner class at the same time. But this is only a guess.

See below both thread dump stacktraces.

Any hint to solve this problem is highly appreciated.

Jens

"catalina-exec-11" Id=67 BLOCKED on org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl$PackageAwareLoader@adedf6 owned by "catalina-exec-40" Id=96
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:675)
at sun.reflect.GeneratedMethodAccessor37.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at javassist.ClassPool.toClass2(ClassPool.java:965)
at javassist.ClassPool.toClass(ClassPool.java:947)
at org.apache.tapestry.ioc.internal.services.CtClassSource.createClass(CtClassSource.java:87)
at org.apache.tapestry.ioc.internal.services.AbstractFab.createClass(AbstractFab.java:106)
at org.apache.tapestry.internal.services.PropertyConduitSourceImpl.build(PropertyConduitSourceImpl.java:185)
at org.apache.tapestry.internal.services.PropertyConduitSourceImpl.create(PropertyConduitSourceImpl.java:120)
at $PropertyConduitSource_11a6cad5e6b.create($PropertyConduitSource_11a6cad5e6b.java)
at org.apache.tapestry.internal.bindings.PropBindingFactory.newBinding(PropBindingFactory.java:48)
at $BindingFactory_11a6cad5e6c.newBinding($BindingFactory_11a6cad5e6c.java)
at $BindingFactory_11a6cad5e63.newBinding($BindingFactory_11a6cad5e63.java)
at org.apache.tapestry.internal.services.BindingSourceImpl.newBinding(BindingSourceImpl.java:79)
at $BindingSource_11a6cad5e55.newBinding($BindingSource_11a6cad5e55.java)
at org.apache.tapestry.internal.services.PageElementFactoryImpl.parseAttributeExpansionExpression(PageElementFactoryImpl.java:127)
at org.apache.tapestry.internal.services.PageElementFactoryImpl.newBinding(PageElementFactoryImpl.java:299)
at $PageElementFactory_11a6cad5e4f.newBinding($PageElementFactory_11a6cad5e4f.java)
at org.apache.tapestry.internal.services.PageLoaderProcessor.findBinding(PageLoaderProcessor.java:264)
at org.apache.tapestry.internal.services.PageLoaderProcessor.bindParametersFromModel(PageLoaderProcessor.java:217)
at org.apache.tapestry.internal.services.PageLoaderProcessor.startComponent(PageLoaderProcessor.java:667)
at org.apache.tapestry.internal.services.PageLoaderProcessor.loadTemplateForComponent(PageLoaderProcessor.java:500)
at org.apache.tapestry.internal.services.PageLoaderProcessor.workComponentQueue(PageLoaderProcessor.java:807)
at org.apache.tapestry.internal.services.PageLoaderProcessor.loadPage(PageLoaderProcessor.java:392)
at org.apache.tapestry.internal.services.PageLoaderImpl.loadPage(PageLoaderImpl.java:59)
at $PageLoader_11a6cad5e4d.loadPage($PageLoader_11a6cad5e4d.java)
at org.apache.tapestry.internal.services.PagePoolCache.checkout(PagePoolCache.java:188)
at org.apache.tapestry.internal.services.PagePoolImpl.checkout(PagePoolImpl.java:107)
at $PagePool_11a6cad5e4c.checkout($PagePool_11a6cad5e4c.java)
at org.apache.tapestry.internal.services.RequestPageCacheImpl.get(RequestPageCacheImpl.java:43)
at $RequestPageCache_11a6cad5e4b.get($RequestPageCache_11a6cad5e4b.java)
at $RequestPageCache_11a6cad5e0d.get($RequestPageCache_11a6cad5e0d.java)
at org.apache.tapestry.internal.services.LinkFactoryImpl.createPageLink(LinkFactoryImpl.java:273)
at $LinkFactory_11a6cad5e47.createPageLink($LinkFactory_11a6cad5e47.java)
at org.apache.tapestry.internal.structure.PageImpl.createPageLink(PageImpl.java:161)
at org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.createPageLink(InternalComponentResourcesImpl.java:129)
at org.apache.tapestry.corelib.components.PageLink.beginRender(PageLink.java:73)
at org.apache.tapestry.corelib.components.PageLink.beginRender(PageLink.java)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl$11$1.run(ComponentPageElementImpl.java:338)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl.invoke(ComponentPageElementImpl.java:874)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl.access$100(ComponentPageElementImpl.java:54)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl$11.render(ComponentPageElementImpl.java:342)
at org.apache.tapestry.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:63)
at org.apache.tapestry.internal.services.PageRenderQueueImpl.render(PageRenderQueueImpl.java:84)
at $PageRenderQueue_11a6cad61e4.render($PageRenderQueue_11a6cad61e4.java)
at $PageRenderQueue_11a6cad61dd.render($PageRenderQueue_11a6cad61dd.java)
at org.apache.tapestry.services.TapestryModule$19.renderMarkup(TapestryModule.java:1293)
at nz.toc.taptoolsapp.services.CustomValidationDecoratorRenderer.renderMarkup(CustomValidationDecoratorRenderer.java:28)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at org.apache.tapestry.services.TapestryModule$23.renderMarkup(TapestryModule.java:1402)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at org.apache.tapestry.services.TapestryModule$22.renderMarkup(TapestryModule.java:1383)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at org.apache.tapestry.services.TapestryModule$21.renderMarkup(TapestryModule.java:1365)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at nz.toc.taptoolsapp.services.AppModule$1.renderMarkup(AppModule.java:79)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at org.apache.tapestry.services.TapestryModule$20.renderMarkup(TapestryModule.java:1347)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at $MarkupRenderer_11a6cad61e2.renderMarkup($MarkupRenderer_11a6cad61e2.java)
at org.apache.tapestry.internal.services.PageMarkupRendererImpl.renderPageMarkup(PageMarkupRendererImpl.java:55)
at $PageMarkupRenderer_11a6cad61e0.renderPageMarkup($PageMarkupRenderer_11a6cad61e0.java)
at org.apache.tapestry.internal.services.PageResponseRendererImpl.renderPageResponse(PageResponseRendererImpl.java:57)
at $PageResponseRenderer_11a6cad5e45.renderPageResponse($PageResponseRenderer_11a6cad5e45.java)
at org.apache.tapestry.internal.services.PageRenderRequestHandlerImpl.handle(PageRenderRequestHandlerImpl.java:59)
at org.apache.tapestry.services.TapestryModule$29.handle(TapestryModule.java:1607)
at $PageRenderRequestHandler_11a6cad5e46.handle($PageRenderRequestHandler_11a6cad5e46.java)
at $PageRenderRequestHandler_11a6cad5e3b.handle($PageRenderRequestHandler_11a6cad5e3b.java)
at org.apache.tapestry.internal.services.PageRenderDispatcher.process(PageRenderDispatcher.java:97)
at org.apache.tapestry.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.java:73)
at $Dispatcher_11a6cad5e42.dispatch($Dispatcher_11a6cad5e42.java)
at $Dispatcher_11a6cad5e33.dispatch($Dispatcher_11a6cad5e33.java)
at org.apache.tapestry.services.TapestryModule$13.service(TapestryModule.java:944)
at de.XYZ.client.services.AppModule$1.service(AppModule.java:92)
at $RequestFilter_11a6cad5e32.service($RequestFilter_11a6cad5e32.java)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at org.apache.tapestry.internal.services.LocalizationFilter.service(LocalizationFilter.java:42)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at org.apache.tapestry.services.TapestryModule$3.service(TapestryModule.java:553)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at org.apache.tapestry.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:79)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at nu.localhost.tapestry.acegi.services.internal.RequestFilterWrapper$1.doFilter(RequestFilterWrapper.java:60)
at nu.localhost.tapestry.acegi.services.internal.AcegiExceptionTranslationFilter.doFilter(AcegiExceptionTranslationFilter.java:67)
at nu.localhost.tapestry.acegi.services.internal.RequestFilterWrapper.service(RequestFilterWrapper.java:54)
at $RequestFilter_11a6cad5e2e.service($RequestFilter_11a6cad5e2e.java)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at org.apache.tapestry.services.TapestryModule$2.service(TapestryModule.java:520)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.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 $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at $RequestHandler_11a6cad5e29.service($RequestHandler_11a6cad5e29.java)
at org.apache.tapestry.services.TapestryModule$12.service(TapestryModule.java:924)
at de.XYZ.client.services.AppModule$3.service(AppModule.java:152)
at $HttpServletRequestFilter_11a6cad5e28.service($HttpServletRequestFilter_11a6cad5e28.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at org.apache.tapestry.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
at $HttpServletRequestFilter_11a6cad5e27.service($HttpServletRequestFilter_11a6cad5e27.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e26.service($HttpServletRequestFilter_11a6cad5e26.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e25.service($HttpServletRequestFilter_11a6cad5e25.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e24.service($HttpServletRequestFilter_11a6cad5e24.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e23.service($HttpServletRequestFilter_11a6cad5e23.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e22.service($HttpServletRequestFilter_11a6cad5e22.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at $HttpServletRequestHandler_11a6cad5e21.service($HttpServletRequestHandler_11a6cad5e21.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.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 com.jamonapi.http.JAMonTomcatValve.invoke(JAMonTomcatValve.java:72)
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$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:354)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:613)

"catalina-exec-40" Id=96 BLOCKED on java.lang.Class@967f35 owned by "catalina-exec-11" Id=67
at javassist.ClassPool.toClass2(ClassPool.java:964)
at javassist.ClassPool.toClass(ClassPool.java:947)
at org.apache.tapestry.ioc.internal.services.CtClassSource.createClass(CtClassSource.java:87)
at org.apache.tapestry.ioc.internal.services.AbstractFab.createClass(AbstractFab.java:106)
at org.apache.tapestry.ioc.internal.ModuleImpl.createProxyInstance(ModuleImpl.java:378)
at org.apache.tapestry.ioc.internal.ModuleImpl.createProxy(ModuleImpl.java:341)
at org.apache.tapestry.ioc.internal.ModuleImpl.create(ModuleImpl.java:233)
at org.apache.tapestry.ioc.internal.ModuleImpl.findOrCreate(ModuleImpl.java:163)
at org.apache.tapestry.ioc.internal.ModuleImpl.getService(ModuleImpl.java:91)
at org.apache.tapestry.ioc.internal.RegistryImpl.getService(RegistryImpl.java:293)
at org.apache.tapestry.ioc.internal.RegistryImpl.getService(RegistryImpl.java:523)
at org.apache.tapestry.ioc.internal.ObjectLocatorImpl.getService(ObjectLocatorImpl.java:45)
at org.apache.tapestry.internal.services.ServiceInjectionProvider.provideInjection(ServiceInjectionProvider.java:40)
at $InjectionProvider_11a6cad5e61.provideInjection($InjectionProvider_11a6cad5e61.java)
at $InjectionProvider_11a6cad5e59.provideInjection($InjectionProvider_11a6cad5e59.java)
at org.apache.tapestry.internal.transform.InjectWorker.transform(InjectWorker.java:57)
at $ComponentClassTransformWorker_11a6cad5e5d.transform($ComponentClassTransformWorker_11a6cad5e5d.java)
at $ComponentClassTransformWorker_11a6cad5e57.transform($ComponentClassTransformWorker_11a6cad5e57.java)
at org.apache.tapestry.internal.services.ComponentClassTransformerImpl.transformComponentClass(ComponentClassTransformerImpl.java:147)
at $ComponentClassTransformer_11a6cad5e1d.transformComponentClass($ComponentClassTransformer_11a6cad5e1d.java)
at org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl.onLoad(ComponentInstantiatorSourceImpl.java:166)
at javassist.Loader.findClass(Loader.java:340)
at org.apache.tapestry.internal.services.ComponentInstantiatorSourceImpl$PackageAwareLoader.findClass(ComponentInstantiatorSourceImpl.java:75)
at javassist.Loader.loadClass(Loader.java:311)
at java.lang.ClassLoader.loadClass(ClassLoader.java:251)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:374)
at de.XYZ.client.components.template.TemplateSessioninfo.getLogoutLink(TemplateSessioninfo.java:25)
at $PropertyConduit_11a6cad60e2.get($PropertyConduit_11a6cad60e2.java)
at org.apache.tapestry.internal.bindings.PropBinding.get(PropBinding.java:53)
at org.apache.tapestry.internal.services.PageElementFactoryImpl$2.provideString(PageElementFactoryImpl.java:136)
at org.apache.tapestry.internal.services.AttributeExpansionBinding.get(AttributeExpansionBinding.java:37)
at org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.readParameter(InternalComponentResourcesImpl.java:233)
at org.apache.tapestry.internal.structure.InternalComponentResourcesImpl.readParameter(InternalComponentResourcesImpl.java:248)
at org.apache.tapestry.corelib.components.PageLink._$read_parameter_page(PageLink.java)
at org.apache.tapestry.corelib.components.PageLink.beginRender(PageLink.java:73)
at org.apache.tapestry.corelib.components.PageLink.beginRender(PageLink.java)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl$11$1.run(ComponentPageElementImpl.java:338)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl.invoke(ComponentPageElementImpl.java:874)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl.access$100(ComponentPageElementImpl.java:54)
at org.apache.tapestry.internal.structure.ComponentPageElementImpl$11.render(ComponentPageElementImpl.java:342)
at org.apache.tapestry.internal.services.RenderQueueImpl.run(RenderQueueImpl.java:63)
at org.apache.tapestry.internal.services.PageRenderQueueImpl.render(PageRenderQueueImpl.java:84)
at $PageRenderQueue_11a6cad61e4.render($PageRenderQueue_11a6cad61e4.java)
at $PageRenderQueue_11a6cad61dd.render($PageRenderQueue_11a6cad61dd.java)
at org.apache.tapestry.services.TapestryModule$19.renderMarkup(TapestryModule.java:1293)
at nz.toc.taptoolsapp.services.CustomValidationDecoratorRenderer.renderMarkup(CustomValidationDecoratorRenderer.java:28)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at org.apache.tapestry.services.TapestryModule$23.renderMarkup(TapestryModule.java:1402)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at org.apache.tapestry.services.TapestryModule$22.renderMarkup(TapestryModule.java:1383)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at org.apache.tapestry.services.TapestryModule$21.renderMarkup(TapestryModule.java:1365)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at nz.toc.taptoolsapp.services.AppModule$1.renderMarkup(AppModule.java:79)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at org.apache.tapestry.services.TapestryModule$20.renderMarkup(TapestryModule.java:1347)
at $MarkupRenderer_11a6cad61e6.renderMarkup($MarkupRenderer_11a6cad61e6.java)
at $MarkupRenderer_11a6cad61e2.renderMarkup($MarkupRenderer_11a6cad61e2.java)
at org.apache.tapestry.internal.services.PageMarkupRendererImpl.renderPageMarkup(PageMarkupRendererImpl.java:55)
at $PageMarkupRenderer_11a6cad61e0.renderPageMarkup($PageMarkupRenderer_11a6cad61e0.java)
at org.apache.tapestry.internal.services.PageResponseRendererImpl.renderPageResponse(PageResponseRendererImpl.java:57)
at $PageResponseRenderer_11a6cad5e45.renderPageResponse($PageResponseRenderer_11a6cad5e45.java)
at org.apache.tapestry.internal.services.PageRenderRequestHandlerImpl.handle(PageRenderRequestHandlerImpl.java:59)
at org.apache.tapestry.services.TapestryModule$29.handle(TapestryModule.java:1607)
at $PageRenderRequestHandler_11a6cad5e46.handle($PageRenderRequestHandler_11a6cad5e46.java)
at $PageRenderRequestHandler_11a6cad5e3b.handle($PageRenderRequestHandler_11a6cad5e3b.java)
at org.apache.tapestry.internal.services.PageRenderDispatcher.process(PageRenderDispatcher.java:97)
at org.apache.tapestry.internal.services.PageRenderDispatcher.dispatch(PageRenderDispatcher.java:73)
at $Dispatcher_11a6cad5e42.dispatch($Dispatcher_11a6cad5e42.java)
at $Dispatcher_11a6cad5e33.dispatch($Dispatcher_11a6cad5e33.java)
at org.apache.tapestry.services.TapestryModule$13.service(TapestryModule.java:944)
at de.XYZ.client.services.AppModule$1.service(AppModule.java:92)
at $RequestFilter_11a6cad5e32.service($RequestFilter_11a6cad5e32.java)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at org.apache.tapestry.internal.services.LocalizationFilter.service(LocalizationFilter.java:42)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at org.apache.tapestry.services.TapestryModule$3.service(TapestryModule.java:553)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at org.apache.tapestry.internal.services.StaticFilesFilter.service(StaticFilesFilter.java:79)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at nu.localhost.tapestry.acegi.services.internal.RequestFilterWrapper$1.doFilter(RequestFilterWrapper.java:60)
at nu.localhost.tapestry.acegi.services.internal.AcegiExceptionTranslationFilter.doFilter(AcegiExceptionTranslationFilter.java:67)
at nu.localhost.tapestry.acegi.services.internal.RequestFilterWrapper.service(RequestFilterWrapper.java:54)
at $RequestFilter_11a6cad5e2e.service($RequestFilter_11a6cad5e2e.java)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at org.apache.tapestry.services.TapestryModule$2.service(TapestryModule.java:520)
at $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.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 $RequestHandler_11a6cad5e34.service($RequestHandler_11a6cad5e34.java)
at $RequestHandler_11a6cad5e29.service($RequestHandler_11a6cad5e29.java)
at org.apache.tapestry.services.TapestryModule$12.service(TapestryModule.java:924)
at de.XYZ.client.services.AppModule$3.service(AppModule.java:152)
at $HttpServletRequestFilter_11a6cad5e28.service($HttpServletRequestFilter_11a6cad5e28.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at org.apache.tapestry.internal.services.IgnoredPathsFilter.service(IgnoredPathsFilter.java:62)
at $HttpServletRequestFilter_11a6cad5e27.service($HttpServletRequestFilter_11a6cad5e27.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e26.service($HttpServletRequestFilter_11a6cad5e26.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.wrapper.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:81)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e25.service($HttpServletRequestFilter_11a6cad5e25.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.ui.rememberme.RememberMeProcessingFilter.doFilter(RememberMeProcessingFilter.java:142)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e24.service($HttpServletRequestFilter_11a6cad5e24.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.ui.AbstractProcessingFilter.doFilter(AbstractProcessingFilter.java:271)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e23.service($HttpServletRequestFilter_11a6cad5e23.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper$1.doFilter(HttpServletRequestFilterWrapper.java:57)
at org.acegisecurity.context.HttpSessionContextIntegrationFilter.doFilter(HttpSessionContextIntegrationFilter.java:249)
at nu.localhost.tapestry.acegi.services.internal.HttpServletRequestFilterWrapper.service(HttpServletRequestFilterWrapper.java:52)
at $HttpServletRequestFilter_11a6cad5e22.service($HttpServletRequestFilter_11a6cad5e22.java)
at $HttpServletRequestHandler_11a6cad5e2a.service($HttpServletRequestHandler_11a6cad5e2a.java)
at $HttpServletRequestHandler_11a6cad5e21.service($HttpServletRequestHandler_11a6cad5e21.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.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 com.jamonapi.http.JAMonTomcatValve.invoke(JAMonTomcatValve.java:72)
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$Http11ConnectionHandler.process(Http11Protocol.java:583)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:354)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:650)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:675)
at java.lang.Thread.run(Thread.java:613)

Howard suggested:
Please add an issue to JIRA. Looks like there's a situation where one thread is transforming classes while another thread is creating PropertyConduit classes. We'll need to create a mutex for this case.

Issue Links

• is blocked by: TAPESTRY-2561 Rapidly refreshing a page, even the same page, can cause a deadlock related to class loading