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Posted to dev@cocoon.apache.org by "Sands Fish (JIRA)" <ji...@apache.org> on 2010/09/20 20:37:33 UTC
[jira] Commented: (COCOON-2277) NPE in
DynamicURLStreamHandlerFactory (Cocoon JNET)
[ https://issues.apache.org/jira/browse/COCOON-2277?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12912629#action_12912629 ]
Sands Fish commented on COCOON-2277:
------------------------------------
I'm from the "other open source project", and I want to confirm that this bug is biting us very hard. I work on MIT's DSpace repository, and we are seeing regular occurrences of up to 3 or 4 times per day on our production instance.
I was able to reproduce the condition by stressing our server with a large amount of concurrent requests on the same URL. Particularly, on a URL that throws an exception during pipeline processing, though this is correct behavior for our application.
We received the exact same exception as listed above and this is happening on a regular basis due to the amount of traffic from spiders + normal traffic.
Could someone please comment on the status of this fix and the anticipated resolution time? There are some hacks on the JIRA ticket for DSpace listed above.
> NPE in DynamicURLStreamHandlerFactory (Cocoon JNET)
> ---------------------------------------------------
>
> Key: COCOON-2277
> URL: https://issues.apache.org/jira/browse/COCOON-2277
> Project: Cocoon
> Issue Type: Bug
> Components: * Cocoon Core, - Servlet service framework
> Affects Versions: 2.2-dev (Current SVN)
> Reporter: Gabriel Gruber
> Priority: Critical
>
> 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
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