Java.lang.NoClassDefFoundError: org/apache/xerces/parsers/SAXParser

Question

We are trying to evaluate Weblogic 6.1 Beta version.
We have tried a setup that is working in WebLogic 6.0 sp1 version,
but the same setup fails in the Beta version.
We get ...
java.lang.NoClassDefFoundError:
org/apache/xerces/parsers/SAXParser
We had not specified any addl. jars in the classpath
in 6.0 sp1 version. But this fails in the Beta version.
Could someone tell if this is a known bug in the Beta release and
suggest a solution or tell if this will be fixed in the actual version
when it is
released in July?
Thanks.
-Arvind

Answer 1

"Jeeva" <[email protected]> wrote in message
news:3b40ecb5$[email protected]..
>
Alternatively u can set the parameters to look at the right parser when uneed
it. This can be done by:
System.setProperty("javax.xml.parsers.SAXParserFactory","org.apache.xerces.jaxp.SAXParserFactoryImpl");
System.setProperty("javax.xml.parsers.DocumentBuilderFactory","org.apache.xerces.jaxp.DocumentBuilderFactoryImpl");
System.setProperty("javax.xml.parsers.SAXParser","org.apache.xerces.jaxp.SAXParserImpl");
This is far from being recommended for the following reason:
The JAXP factories cache the classes used to instantiate the factories,
therefore you cannot changed dynamically these properties at runtime, you
will have absolutely NO guarantee that this will work. If a factory is
instantiated before yours, it will use this one. Additionaly, Weblogic
already defines these properties at startup so that they refer to their own
factories that can look into the XML registry.
Consider these properties as being read-only. Chance are that you will mess
up everything if you modify them.
If you need to define a specific parser (such as crimson), then put crimson
in your system classpath and set the XML registry appropriately.
If you want to take a look at jaxp strategy. Use the JVM
property -Djaxp.debug=true.
As well use -Dweblogic.xml.debug=true for Weblogic XML related info.
Stéphane Bailliez
Software Engineer, Paris - France
iMediation - http://www.imediation.com
Disclaimer: All the opinions expressed above are mine and not those from my
company.