Best Tomcat maintainers, I would like to report the following warning message.
When redeploy a web application, there will be a warning message like this: *WARNING: An illegal reflective access operation has occurredWARNING: Illegal reflective access by org.apache.catalina.loader.WebappClassLoaderBase to field java.io.ObjectStreamClass$Caches.localDescsWARNING: Please consider reporting this to the maintainers of org.apache.catalina.loader.WebappClassLoaderBaseWARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operationsWARNING: All illegal access operations will be denied in a future release* I have already debugged it and find the message happens only *java 11*. In WebappClassLoaderBase class: clearReferencesObjectStreamClassCaches() -> clearCache(clazz, "localDescs") -> f.setAccessible(true); in java 11, The f (java.lang.reflect.Field) setAccessible overrides its superclass, which contains the following check: if (flag) checkCanSetAccessible(Reflection.getCallerClass()); And this check results the above warning messages. Best regards, Hua
