https://bz.apache.org/bugzilla/show_bug.cgi?id=58143
Bug ID: 58143
Summary: The WebppClassLoader doesn't call transformers on
cached classes
Product: Tomcat 8
Version: 8.0.24
Hardware: PC
Status: NEW
Severity: normal
Priority: P2
Component: Catalina
Assignee: dev@tomcat.apache.org
Reporter: andrei.iva...@gmail.com
The Spring Framework load time weaving mechanism registers class file
transformers when the web app is deployed:
WebappClassLoader(WebappClassLoaderBase).addTransformer(ClassFileTransformer)
line: 666
TomcatLoadTimeWeaver.addTransformer(ClassFileTransformer) line: 88
DefaultContextLoadTimeWeaver.addTransformer(ClassFileTransformer) line: 143
AspectJWeavingEnabler.enableAspectJWeaving(LoadTimeWeaver, ClassLoader)
line: 83
AspectJWeavingEnabler.postProcessBeanFactory(ConfigurableListableBeanFactory)
line: 71
PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(Collection<BeanFactoryPostProcessor>,
ConfigurableListableBeanFactory) line: 284
PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory,
List<BeanFactoryPostProcessor>) line: 174
XmlWebApplicationContext(AbstractApplicationContext).invokeBeanFactoryPostProcessors(ConfigurableListableBeanFactory)
line: 658
XmlWebApplicationContext(AbstractApplicationContext).refresh() line: 504
ContextLoaderListener(ContextLoader).configureAndRefreshWebApplicationContext(ConfigurableWebApplicationContext,
ServletContext) line: 446
ContextLoaderListener(ContextLoader).initWebApplicationContext(ServletContext)
line: 328
ContextLoaderListener.contextInitialized(ServletContextEvent) line: 107
StandardContext.listenerStart() line: 4729
StandardContext.startInternal() line: 5167
StandardContext(LifecycleBase).start() line: 150
StandardHost(ContainerBase).addChildInternal(Container) line: 725
StandardHost(ContainerBase).addChild(Container) line: 701
StandardHost.addChild(Container) line: 717
HostConfig.deployWAR(ContextName, File) line: 945
HostConfig$DeployWar.run() line: 1768
Executors$RunnableAdapter<T>.call() line: 511
FutureTask<V>.run() line: 266
ThreadPoolExecutor.runWorker(ThreadPoolExecutor$Worker) line: 1142
ThreadPoolExecutor$Worker.run() line: 617
Thread.run() line: 745
After this moment, any classes loaded will be transformed, if necessary.
My problem is that Tomcat loads some classes before these transformers are
registered:
WebappClassLoader(WebappClassLoaderBase).findResourceInternal(String,
String, boolean) line: 2639
WebappClassLoader(WebappClassLoaderBase).findResource(String) line: 936
WebappClassLoader(WebappClassLoaderBase).getResourceAsStream(String) line:
1115
ContextConfig.populateJavaClassCache(String) line: 2165
ContextConfig.populateJavaClassCache(String, JavaClass) line: 2155
ContextConfig.checkHandlesTypes(JavaClass) line: 2060
ContextConfig.processAnnotationsStream(InputStream, WebXml, boolean) line:
2012
ContextConfig.processAnnotationsJar(URL, WebXml, boolean) line: 1961
ContextConfig.processAnnotationsUrl(URL, WebXml, boolean) line: 1936
ContextConfig.processAnnotations(Set<WebXml>, boolean) line: 1897
ContextConfig.webConfig() line: 1149
ContextConfig.configureStart() line: 771
ContextConfig.lifecycleEvent(LifecycleEvent) line: 305
LifecycleSupport.fireLifecycleEvent(String, Object) line: 117
StandardContext(LifecycleBase).fireLifecycleEvent(String, Object) line: 90
StandardContext.startInternal() line: 5066
StandardContext(LifecycleBase).start() line: 150
StandardHost(ContainerBase).addChildInternal(Container) line: 725
StandardHost(ContainerBase).addChild(Container) line: 701
StandardHost.addChild(Container) line: 717
HostConfig.deployWAR(ContextName, File) line: 945
HostConfig$DeployWar.run() line: 1768
Executors$RunnableAdapter<T>.call() line: 511
FutureTask<V>.run() line: 266
ThreadPoolExecutor.runWorker(ThreadPoolExecutor$Worker) line: 1142
ThreadPoolExecutor$Worker.run() line: 617
Thread.run() line: 745
This makes subsequent calls to WebappClassLoaderBase.findResourceInternal to
return cached resources:
ResourceEntry entry = resourceEntries.get(path);
if (entry != null) {
return entry;
}
These cached resources will not go through the transformers, which are called
bellow.
Maybe the resourceEntries cache could be flushed somehow?
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