As per my previous post I have installed Railo and Open BlueDragon on Jrun 4 as instances of a multiserver installation that also support cf8 and cf7.
Starting my tests I noted that both Railo and OpenBd in this particular configuration shows issues performing xml parse operations.
I got errors on both servers running code like:
<code class="coldfusion">
var xml = xmlParse(xml);
result = xmlSearch(xml,'/items/');
</code>
Googling around I discovered that Jrun miss some classes/configurations that both Railo and OpenBd native installtion provide.
I added this line in the java.config file as java.args ( I cut it for making it readable but you must add it all in one line with no spaces ).
<code class="coldfusion">
-Djavax.xml.parsers.DocumentBuilderFactory=
com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl
</code>
Restart the server and the xml functionalities will be regulary available.