Hi people,
I'm trying to use the org.apache.bcel.util.JavaWrapper to create a proxy to
use the class loader org.apache.bcel.util.ClassLoader on tomcat version
3.2.1 and am getting an error:
java.lang.reflect.InvocationTargetException: java.lang.LinkageError: loader
constraints violated when linking org/xml/sax/HandlerBase class at
org.apache.tomcat.util.xml.XmlMapper.readXml(XmlMapper.java:325) at
org.apache.tomcat.startup.Tomcat.execute(Tomcat.java:187) at
org.apache.tomcat.startup.Tomcat.main(Tomcat.java:235) at
StartTomcat.main(StartTomcat.java:9) at
java.lang.reflect.Method.invoke(Native Method) at
org.apache.bcel.util.JavaWrapper.runMain(JavaWrapper.java:127) at
org.apache.bcel.util.JavaWrapper.main(JavaWrapper.java:149)
I've traced the exception into the class
org.apache.tomcat.util.xml.XmlMapper.readXml(File xmlFile, Object root)
method. Here's the code snippit of that particular method. Any clue as to
what this error means, why it's happening, and how I can get rid of it so
tomcat will run under the JavaWrapper?
Is this the right group to post to?
Any help will be GREATLY appreciated.
--Abel
public Object readXml(File xmlFile, Object root)
throws Exception
{
if(root != null)
{
Stack st = getObjectStack();
this.root = root;
st.push(root);
}
try
{
SAXParser parser = null;
SAXParserFactory factory = SAXParserFactory.newInstance();
factory.setNamespaceAware(false);
factory.setValidating(validating);
parser = factory.newSAXParser();
// THIS IS THE LINE THAT CAUSES THE EXCEPTION!!!!!!!!!!!!!!!!!!!!!
parser.parse(xmlFile, this);
return root;
}
catch(IOException ioe)
{
ioe.printStackTrace();
String msg = "Can't open config file: " + xmlFile + " due to: "
+ ioe;
throw new Exception(msg);
}
catch(SAXException se)
{
System.out.println("ERROR reading " + xmlFile);
System.out.println("At " + se.getMessage());
System.out.println();
Exception ex1 = se.getException();
if(ex1 != null)
throw ex1;
else
throw se;
}
}
on the offending line (i've added comments above the offending line), i've
traced it into the class loader where it trys to load the class
javax.xml.parsers.SAXParser. Everything goes fine until the last line.
When the method loadClass trys to return class, it throws the exception.
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