java.lang.ClassNotFoundException: There's no JAXB 2.2 API in the classpath

I have previously developed several web services in Netbeans 6.9 IDE with much ease and flexibility.
But today when i launched Netbeans 6.9 today, it downloaded some updates by itself and all my existing web services were showing build errors.
The following are couple of exceptions that i noted down:
java.lang.ClassNotFoundException: There's no JAXB 2.2 API in the classpath
C:\Projects\proj_name\nbproject\jaxws-build.xml:22: taskdef class com.sun.tools.ws.ant.WsImport cannot be found
taskdef A class needed by class com.sun.tools.ws.ant.WsImport cannot
be found: org/apache/tools/ant/taskdefs/MatchingTask

While i kept on fixing one after another exception, here is the permanent fix that resolved all the issues:
I had several Jars inside this directory: C:\Program Files\Java\jdk1.6.0_24\jre\lib\endorsed
like webservices-api.jar, jaxb-api.jar, jaxws-api.jar, jaxb-xjc.jar, jaxws-tools-2.0.jar, jaxws-tools-2.1.4.jar.
There was an existing issue that was raised here:
http://java.net/jira/browse/JAX_WS-200

The permanent fix is to remove all the jars and just keep the following :
1. jaxws-api.jar
2. jaxb-api.jar

Reason:
The problem is that by putting all the jars in endorsed directory, when
jaxws-tools.jar is loaded Wsimport ant task looks from boot classloader for the
ant class and does not find it.

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