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Austin,
On 3/21/15 6:19 PM, Austin Jones wrote:
> I'm having an issue with Tomcat 8.0.12 when undeploying contexts.
> I have autoDeploy turned off, and am pushing WARs+context.xmls
> through the Tomcat manager's deploy command.
>
> I have several ServletContextListeners that handle proper context
> shutdown. The ones that cause the issue look like this:
>
> @Override public synchronized void contextInitialized(
> ServletContextEvent event ) { if( enabled ) {
> MyClass.initialize(); } }
>
> @Override public synchronized void contextDestroyed(
> ServletContextEvent event ) { MyClass.release(); }
>
> If the 'enabled' flag is not set, and MyClass was not loaded
> anywhere else in the app, the webapp ClassLoader tries to load the
> class while the context is shutting down. It throws this
> exception: java.lang.NoClassDefFoundError: some/package/MyClass at
> some.package.MyListener.contextDestroyed(SingletonCleaner.java:na)
> at
> org.apache.catalina.core.StandardContext.listenerStop(StandardContext.java:4792)
>
>
at
> org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5392)
>
>
at
> org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
>
>
at
> org.apache.catalina.core.StandardContext.reload(StandardContext.java:3768)
>
>
at
> org.apache.catalina.startup.HostConfig.reload(HostConfig.java:1306)
>
>
at
> org.apache.catalina.startup.HostConfig.checkResources(HostConfig.java:1238)
>
>
at
> org.apache.catalina.startup.HostConfig.check(HostConfig.java:1493)
> at sun.reflect.GeneratedMethodAccessor574.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>
>
at java.lang.reflect.Method.invoke(Method.java:483)
> at
> org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
>
>
at
> com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
>
>
- --
> Caused by: java.lang.ClassNotFoundException: some.package.MyClass
> at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1320)
>
>
at
> org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1173)
>
>
... 45 more
>
> I set WebappClassLoader logging levels to FINE, and got this
> output: 21-Mar-2015 14:59:46.493 FINE [localhost-startStop-1]
> org.apache.catalina.loader.WebappClassLoader.loadClass
> loadClass(some.package.MyClass, false) 21-Mar-2015 14:59:46.493
> FINE [localhost-startStop-1]
> org.apache.catalina.loader.WebappClassLoader.findClass
> findClass(some.package.MyClass)
>
> Any ideas why the class loader is throwing the errors?
Could you try again with the latest 8.0.20? There was a change in
8.0.18 that /might/ impact your situation:
https://bz.apache.org/bugzilla/show_bug.cgi?id=57446
- -chris
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