PROBLEM: When you are trying to use sunRise and your plataform is:

        Cocoon 2.0.3
        Tomcat 2.1.8 or 2.1.9
        Java 1.4 or 1.4.1

You get the following error:

java.lang.NullPointerException

java.lang.NullPointerException at
org.apache.cocoon.sunshine.xml.XMLUtil.getNodesFromPath(XMLUtil.java:869)
at org.apache.cocoon.sunshine.xml.XMLUtil.getNodesFromPath(XMLUtil.java:871)
at org.apache.cocoon.sunshine.xml.XMLUtil.getNodesFromPath(XMLUtil.java:871)
at org.apache.cocoon.sunshine.xml.XMLUtil.getNodeListFromPath(XMLUtil.java:836
at 
org.apache.cocoon.sunshine.context.SimpleSessionContext.getXML(SimpleSession 
Context.java:173)
at org.apache.cocoon.sunshine.sunrise.SunRise.isAuthenticated(SunRise.java:691
....

CAUSE:
You have to configure java to work with this libraries:
        xalan-2.3.1.jar
        xercesImpl-2.0.0.jar
        xml-apis.jar

SOLUTION:
1-Stop Tomcat.
2-Create a directory named "endorsed" at $JAVA_HOME/jre/lib/
3-Copy from Cocoon the following files to the recent created directory:
        xalan-2.3.1.jar
        xercesImpl-2.0.0.jar
        xml-apis.jar
4-Restart Tomcat

THANKS:

Many thanks to Matthew Langham that provide me the link to:

http://marc.theaimsgroup.com/?l=xml-cocoon-users&m=102927633032114&w=2

Antonio Gallardo

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