Hi, Long time developer with log4j (since the 0.9 days), first time poster. An issue that I have stumbled across when using log4j with the 1.3 jdk is that you can't drop log4j.jar into a java extensions directory and then use any custom pattern layouts or custom appenders that are found in the regular class path due to security/classloader-weirdness issues. This means that the log4j.jar must always be included in the main classpath when custom appenders/pattern-layouts are used that also appear in the main classpath. The way that I have seen this handled with other packages (Ognl comes to mind) is to have an interface say ClassResolver that will resolve requests for loading classes. If the class resolver isn't set then the regular forName method is used. This has the benefit of being able to put log4j in the extensions directory and then set a ClassResolver object loaded from the main classpath at startup which can resolve class for name requests for both the main and extensions class loaders.
Any thoughts? Regards, Max ps - The only spot that I have found that would really be effected would be OptionConverter.java