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From "Christoph Nenning (JIRA)" <>
Subject [jira] [Created] (WW-4266) resource reloading does not work in IBM JVM
Date Mon, 30 Dec 2013 12:52:53 GMT
Christoph Nenning created WW-4266:

             Summary: resource reloading does not work in IBM JVM
                 Key: WW-4266
             Project: Struts 2
          Issue Type: Bug
          Components: Core Actions
    Affects Versions: 2.3.16
         Environment: WAS 8.5 with IBM JVM 6
            Reporter: Christoph Nenning
            Priority: Trivial

When resources reloading is enabled, LocalizedTextUtil uses reflection to clear a private
static map of the ResourceBundle class. The member name of that map is "cacheList".

The IBM JVM has a different impl of ResourceBundle which does not have the "cacheList" member.
That causes a lot of NoSuchFieldExceptions in log and resource reloading does not work.

To fix it the patch catches NoSuchFieldException and uses clearMap() to clear the cache of
that IBM ResourceBundle (which is just called "cache").

- Javadoc indicates that that IBM code is based on the Apache Harmony project
- The type of that cache member is:
WeakHashMap<ClassLoader, Hashtable<String, ResourceBundleSoftRef>>
So one could argue that the patch clears too much, but IMHO that is OK as it is intended for
development mode anyway.

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