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Austin,
On 3/22/15 10:11 PM, Austin Jones wrote:
> After a bit of debugging, I found the issue. The stack traces
> below are on 8.0.12-src.
>
> The bug occurs at this stack:
>
>> StandardContext.reload() line: 3779
>> HostConfig.reload(HostConfig$DeployedApplication) line: 1306
>> HostConfig.checkResources(HostConfig$DeployedApplication) line:
>> 1238 HostConfig.check(String) line: 1493
>
>
> HostConfig.checkResources(DeployedApplication) runs through the
> branch:
>
>> if (app.hasDescriptor && resource.getName().toLowerCase(
>> Locale.ENGLISH).endsWith(".war")) { ... }
>
>
> It calls ExpandWar.delete( docBaseFile ), which is the unpacked
> webapp directory.
>
> Then, checkResources calls reload(app) - which invokes the context
> listener.
>
> The ClassLoader eventually gets down to this stack:
>
>> DirResourceSet.getResource(String) line: 100
>
> StandardRoot.getResourceInternal(String, boolean) line: 280
>> Cache.getResource(String, boolean) line: 65
>> StandardRoot.getResource(String, boolean, boolean) line: 216
>> StandardRoot.getClassLoaderResource(String) line: 225
>> WebappClassLoader.findResourceInternal(String, String) line:
>> 2556 WebappClassLoader.findClassInternal(String) line: 2410
>> WebappClassLoader.findClass(String) line: 880
>> WebappClassLoader.loadClass(String, boolean) line: 1290
>> WebappClassLoader.loadClass(String) line: 1173
>> TestcaseContextListener.contextDestroyed(ServletContextEvent)
>> line: 23 StandardContext.listenerStop() line: 4792
>> StandardContext.stopInternal() line: 5392
>> StandardContext(LifecycleBase).stop() line: 232
>> StandardContext.reload() line: 3768
>> HostConfig.reload(HostConfig$DeployedApplication) line: 1306
>> HostConfig.checkResources(HostConfig$DeployedApplication) line:
>> 1238 HostConfig.check(String) line: 1493
>
>
> Unfortunately, checkResources just deleted the base directory.
> The ClassLoader is looking for
> /WEB-INF/classes/com/avadyne/ThisClassNotFound.class, but that path
> no longer exists. Most of the functions in the stack return null,
> and findClassInternal(String) throws the ClassNotFoundError at line
> 906.
>
> OK, how should this be fixed? Should the ClassLoader fall back to
> the compressed WAR? Should the DocBase be deleted after the
> context is stopped?
If MyClass had been loaded at initialization time (like your sample
code shows), it should not have needed to be loaded back off the disk
for shutdown.
Is it possible that MyClass is referencing another class
(MyOtherClass) during shutdown that was never referenced during startup?
- -chris
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