[jdom-interest] jdom.jar and Websphere 6.0

[Sullivan, Sean C - MWT]

I am using JDOM in a J2EE web application.   My server environment is
Websphere 6.0.1 

Here's what I have in my EAR file:
 
        foobar.ear/foobar.war/WEB-INF/lib/jdom.jar 
 
When I tried using the application, I observed a nasty error:
 
     java.lang.NoSuchMethodError: org.jdom.Document.hasRootElement()Z
 
 I discovered that this error was caused by a classloader / library
conflict.
 
IBM Websphere 6.0.1 provides a copy of the JDOM library.  IBM 
distributes version "1.0b7" version of jdom.jar
 
You'll find JDOM here:
 
	$WEBSPHERE_HOME/lib/jdom.jar

By default, Websphere 6.0.1will load JDOM classes from IBM's private
jdom.jar

You can override this behavior by configuring Websphere to use
PARENT_LAST classloading.

-Sean


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