XML class definition not found.

[whitingjr]

I have had a bug report of a NoClassDefFoundError. When using the 1.4 release.

java.lang.NoClassDefFoundError: org/apache/xerces/dom/DocumentImpl
	java.lang.ClassLoader.defineClass1(Native Method)
	java.lang.ClassLoader.defineClass(ClassLoader.java:763)
	java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
	org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:1634)
	org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:860)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1307)
	org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1189)
	com.sun.org.apache.xerces.internal.utils.ObjectFactory.findProviderClass(ObjectFactory.java:209)
	com.sun.org.apache.xerces.internal.utils.ObjectFactory.findProviderClass(ObjectFactory.java:179)
	com.sun.org.apache.xerces.internal.parsers.AbstractDOMParser.setDocumentClassName(AbstractDOMParser.java:349)
	com.sun.org.apache.xerces.internal.parsers.AbstractDOMParser.reset(AbstractDOMParser.java:427)
	com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:140)
	com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(DOMParser.java:243)
	com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(DocumentBuilderImpl.java:339)
	javax.xml.parsers.DocumentBuilder.parse(DocumentBuilder.java:121)
	org.chiba.xml.xforms.ChibaBean.setXMLContainer(Unknown Source)
	org.chiba.adapter.AbstractChibaAdapter.setXForms(Unknown Source)
	com.sun.faban.harness.webclient.XFormServlet$Adapter.init(XFormServlet.java:398)
	com.sun.faban.harness.webclient.XFormServlet.doGet(XFormServlet.java:222)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	com.sun.faban.harness.engine.InitFilter.doFilter(InitFilter.java:65)

The cause is the class is not available in the same class loader requested now to the class loader when it was earlier loaded. Really the first class loader that loads the class should be the endorsed extensions loader.

[whitingjr]

Also are seen exceptions like this

<record>
  <date>2018-05-24T23:03:21</date>
  <millis>1527195801435</millis>
  <sequence>22</sequence>
  <logger>com.sun.faban.harness.webclient.XFormServlet</logger>
  <level>SEVERE</level>
  <class>com.sun.faban.harness.webclient.XFormServlet</class>
  <method>doGet</method>
  <thread>36</thread>
  <message>Exception processing XForms</message>
  <exception>
    <message>org.chiba.xml.xforms.exception.XFormsException: java.lang.ClassCastException: com.sun.org.apache.xerces.internal.dom.ElementNSImpl cannot be cast to org.apache.xerces.dom.NodeImpl</message>
    <frame>
      <class>org.chiba.xml.xforms.Container</class>
      <method>dispatch</method>
    </frame>
    <frame>
      <class>org.chiba.xml.xforms.Container</class>
      <method>dispatch</method>
    </frame>
    <frame>
      <class>org.chiba.xml.xforms.Container</class>
      <method>initModels</method>
    </frame>
    <frame>
      <class>org.chiba.xml.xforms.Container</class>
      <method>init</method>
    </frame>
    <frame>
      <class>org.chiba.xml.xforms.ChibaBean</class>
      <method>init</method>
    </frame>
    <frame>
      <class>com.sun.faban.harness.webclient.XFormServlet$Adapter</class>
      <method>init</method>
      <line>431</line>
    </frame>
    <frame>
      <class>com.sun.faban.harness.webclient.XFormServlet</class>
      <method>doGet</method>
      <line>230</line>
    </frame>
    <frame>
      <class>javax.servlet.http.HttpServlet</class>
      <method>service</method>
      <line>689</line>
    </frame>
    <frame>
      <class>javax.servlet.http.HttpServlet</class>
      <method>service</method>
      <line>802</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.ApplicationFilterChain</class>
      <method>internalDoFilter</method>
      <line>237</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.ApplicationFilterChain</class>
      <method>doFilter</method>
      <line>157</line>
    </frame>
    <frame>
      <class>com.sun.faban.harness.engine.InitFilter</class>
      <method>doFilter</method>
      <line>65</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.ApplicationFilterChain</class>
      <method>internalDoFilter</method>
      <line>186</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.ApplicationFilterChain</class>
      <method>doFilter</method>
      <line>157</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardWrapperValve</class>
      <method>invoke</method>
      <line>214</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardValveContext</class>
      <method>invokeNext</method>
      <line>104</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardPipeline</class>
      <method>invoke</method>
      <line>520</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardContextValve</class>
      <method>invokeInternal</method>
      <line>198</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardContextValve</class>
      <method>invoke</method>
      <line>152</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardValveContext</class>
      <method>invokeNext</method>
      <line>104</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardPipeline</class>
      <method>invoke</method>
      <line>520</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardHostValve</class>
      <method>invoke</method>
      <line>137</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardValveContext</class>
      <method>invokeNext</method>
      <line>104</line>
    </frame>
    <frame>
      <class>org.apache.catalina.valves.ErrorReportValve</class>
      <method>invoke</method>
      <line>117</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardValveContext</class>
      <method>invokeNext</method>
      <line>102</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardPipeline</class>
      <method>invoke</method>
      <line>520</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardEngineValve</class>
      <method>invoke</method>
      <line>109</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardValveContext</class>
      <method>invokeNext</method>
      <line>104</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.StandardPipeline</class>
      <method>invoke</method>
      <line>520</line>
    </frame>
    <frame>
      <class>org.apache.catalina.core.ContainerBase</class>
      <method>invoke</method>
      <line>929</line>
    </frame>
    <frame>
      <class>org.apache.coyote.tomcat5.CoyoteAdapter</class>
      <method>service</method>
      <line>160</line>
    </frame>
    <frame>
      <class>org.apache.coyote.http11.Http11Processor</class>
      <method>process</method>
      <line>799</line>
    </frame>
    <frame>
      <class>org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler</class>
      <method>processConnection</method>
      <line>705</line>
    </frame>
    <frame>
      <class>org.apache.tomcat.util.net.TcpWorkerThread</class>
      <method>runIt</method>
      <line>577</line>
    </frame>
    <frame>
      <class>org.apache.tomcat.util.threads.ThreadPool$ControlRunnable</class>
      <method>run</method>
      <line>683</line>
    </frame>
    <frame>
      <class>java.lang.Thread</class>
      <method>run</method>
      <line>748</line>
    </frame>
  </exception>
</record>

[whitingjr]

These errors are manifested when using the Faban Web UI to initiate a run.

XForms become unresponsive. Ok or Cancel buttons no longer function.