ClassCastException: JavaScript$Control after webapp redeployment

Hi, Thanks in advance to anyone who can shed some light on this. 

I have been sucessfully using httpunit to drive a backend screen based application.

This code is embedded in a web application (.war file, contained in an .ear file).

The problem seems to be if the .ear is re-deployed, 
httpunit or the js portion is not re-initialized completely.

The httpunit call:

GetMethodWebRequest getReq = new GetMethodWebRequest(urlHelper.getLoginURL());
wResp = wc.getResponse(getReq);


fails with:

java.lang.ClassCastException: 
 com/meterware/httpunit/javascript/JavaScript$Control 
  incompatible with 
 com/meterware/httpunit/javascript/JavaScript$Control

The stack trace:

[Servlet.LOG]: 983120537:2007.01.22-13:12:33:203 CRNBaseAction : Action Error: java.lang.RuntimeException: Event 'if (window.init) init();' failed: org.mozilla.javascript.JavaScriptException: java.lang.ClassCastException: com/meterware/httpunit/javascript/JavaScript$Control incompatible with com/meterware/httpunit/javascript/JavaScript$Control
    at com.meterware.httpunit.javascript.JavaScript$JavaScriptEngine.handleScriptException(JavaScript.java)
    at com.meterware.httpunit.javascript.JavaScript$JavaScriptEngine.performEvent(JavaScript.java)
    at com.meterware.httpunit.scripting.ScriptableDelegate.doEvent(ScriptableDelegate.java:56)
    at com.meterware.httpunit.WebResponse$Scriptable.load(WebResponse.java:689)
    at com.meterware.httpunit.javascript.JavaScript.load(JavaScript.java:89)
    at com.meterware.httpunit.javascript.JavaScriptEngineFactory.load(JavaScriptEngineFactory.java:58)
    at com.meterware.httpunit.RequestContext.runScripts(RequestContext.java)
    at com.meterware.httpunit.WebWindow.getResponse(WebWindow.java:122)
    at com.meterware.httpunit.WebClient.getResponse(WebClient.java:113)
    at com.hcsc.crnclient.action.CRNGetReport.crnLogin(CRNGetReport.java)
    at com.hcsc.crnclient.action.CRNGetReport.doAction(CRNGetReport.java)
    at com.hcsc.crnclient.action.CRNBaseAction.execute(CRNBaseAction.java:80)
    at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484)
    at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274)
    at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482)
    at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:525)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:763)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1282)
    at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:673)
    at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:2905)
    at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:220)
    at com.ibm.ws.webcontainer.VirtualHost.handleRequest(VirtualHost.java:204)
    at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1829)
    at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:84)
    at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:469)
    at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:408)
    at com.ibm.ws.http.channel.inbound.impl.HttpICLReadCallback.complete(HttpICLReadCallback.java:101)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager.requestComplete(WorkQueueManager.java:566)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager.attemptIO(WorkQueueManager.java:619)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager.workerRun(WorkQueueManager.java:952)
    at com.ibm.ws.tcp.channel.impl.WorkQueueManager$Worker.run(WorkQueueManager.java:1039)
    at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1455)


The application is un-usable at this point without re-starting the server.

I am trying to determine if there is a way to force a complete re-initialization from an application context listener, or some other strategy to correct this.

I have been scouring the net and running this code through the debugger but hit the wall at method inv3.invoke()...

Any suggestions or insights would be appreciated.

Thanks.

-Jeff
 
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