[COCOON-2277] NPE in DynamicURLStreamHandlerFactory (Cocoon JNET)

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Affects Version/s: 2.3.0
• Component/s: * Cocoon Core, - Servlet service framework
• Urgency: Urgent
• Affects version (Component): Servlet Service Framework - 1.1.0-dev
• Assignee: Reinhard Poetz
• Reporter: Gabriel Gruber
• Created: 03/Feb/10 07:32
• Updated: 03/Jan/11 23:49
• Resolved: 03/Jan/11 23:49

Description

From time to time after more heavy of our cocoon 2.2 based application (which is not yet in production) I am getting this exception from cocoon jnet. after this exception occurs we have to restart the web application as this exception keeps coming and noone can do anything with the webapp....

java.lang.NullPointerException
                java.util.LinkedList.remove(LinkedList.java:646)
                java.util.LinkedList.remove(LinkedList.java:360)
                org.apache.cocoon.jnet.DynamicURLStreamHandlerFactory.pop(DynamicURLStreamHandlerFactory.java:30)
                org.apache.cocoon.jnet.URLHandlerFactoryCollector.popUrlHandlerFactories(URLHandlerFactoryCollector.java:57)
                org.apache.cocoon.jnet.URLHandlerFactoryCollector.installURLHandlers(URLHandlerFactoryCollector.java:39)
                sun.reflect.GeneratedMethodAccessor516.invoke(Unknown Source)
                sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
                java.lang.reflect.Method.invoke(Method.java:585)
                org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:627)
                org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:616)
                org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:64)
                org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
                org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:89)
                org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
                org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
                $Proxy34.service(Unknown Source)
                org.apache.cocoon.servletservice.ServletServiceContext$PathDispatcher.forward(ServletServiceContext.java:481)
                org.apache.cocoon.servletservice.ServletServiceContext$PathDispatcher.forward(ServletServiceContext.java:455)
                org.apache.cocoon.servletservice.spring.ServletFactoryBean$ServiceInterceptor.invoke(ServletFactoryBean.java:245)
                org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)
                org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
                $Proxy94.service(Unknown Source)
                org.apache.cocoon.servletservice.DispatcherServlet.service(DispatcherServlet.java:106)
                javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
                org.apache.cocoon.servlet.multipart.MultipartFilter.doFilter(MultipartFilter.java:131)

*NOTE* that another open source project reported similar problems:
http://jira.dspace.org/jira/browse/DS-253?page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel