[jira] [Created] (LOG4J2-604) Audit use of ClassLoader, Class.forName, etc.

["Matt Sicker (JIRA)" <ji...@apache.org>]

Matt Sicker created LOG4J2-604:
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             Summary: Audit use of ClassLoader, Class.forName, etc.
                 Key: LOG4J2-604
                 URL: https://issues.apache.org/jira/browse/LOG4J2-604
             Project: Log4j 2
          Issue Type: Epic
          Components: API, Core
    Affects Versions: 2.0-rc2
            Reporter: Matt Sicker
            Priority: Blocker


The idiom {{Class.forName}} is almost always a bad idea if it's called without a classloader to go along with it. The only acceptable place to put it is in something like Loader.loadClass as a last resort.

To make sure everything works as expected in non-trivial environments (e.g., multiple LoggerContexts associated to completely different ClassLoaders like in webapps or bundles), all usage of dynamic class loading should be audited for correctness. The appropriate neighbour class can be used for getting a class loader in most cases (i.e., another already loaded class that should be from the same JAR).

I'll try to add some integration tests that create sub-classloaders that isolate contexts from one another to ensure correctness.



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