AppEngine Error [ java.lang.NoClassDefFoundError: org/w3c/dom/ElementTraversal ]

[tremendows via StackOverflow]

MAVEN SOLUTION:

Adding this version of the dependency to the pom.xml (if using maven) worked for me:

<dependency>
    <groupId>xml-apis</groupId>
    <artifactId>xml-apis</artifactId>
    <version>1.4.01</version>
</dependency>

SOLUTION FOR EVERYONE ELSE:

If not using maven, you can manually add the xml-apis library, version 1.4.01. You will find the jars inside the xml-commons binary package, and you can download it here: http://xerces.apache.org/mirrors.cgi. Finally compile and execute your java application/project with this version of the library.

Explanation:

The 1.4.01 version of the xml-apis library, includes the required ElementTraversal class. Other versions like 2.0.0, 1.0.0, etc. do not include it, and the application fails while compiling.

Please DO NOT REPLY directly to this email but go to StackOverflow:
http://stackoverflow.com/questions/10234201/appengine-error-java-lang-noclassdeffounderror-org-w3c-dom-elementtraversal/15197808#15197808

[tremendows via StackOverflow]