Help - JSP throws exception with Linux Websphere but not Windows

[Darien Cheung]

I'm getting an exception in my JSP when I use a custom tag library and it only happens when I deploy into a Linux Websphere AS 6.1. In the Windows Websphere AS 6.1, it works perfectly.

 
java.lang.NullPointerException
sun.reflect.misc.ReflectUtil.checkPackageAccess(ReflectUtil.java:125)
sun.reflect.misc.ReflectUtil.isPackageAccessible(ReflectUtil.java:147)
java.beans.Introspector.getBeanInfo(Introspector.java:183)
com.ibm.ws.jsp.taglib.TagClassInfo.getParameterClassName(TagClassInfo.java:161)
com.ibm.ws.jsp.translator.visitor.generator.BaseTagGenerator.evaluateAttribute(BaseTagGenerator.java:341)
com.ibm.ws.jsp.translator.visitor.generator.BaseTagGenerator.generateSetters(BaseTagGenerator.java:230)
com.ibm.ws.jsp.translator.visitor.generator.CustomTagGenerator.startGeneration(CustomTagGenerator.java:342)
com.ibm.ws.jsp.translator.visitor.generator.GenerateVisitor.startGeneration(GenerateVisitor.java:697)
com.ibm.ws.jsp.translator.visitor.generator.GenerateVisitor.visitCustomTagStart(GenerateVisitor.java:397)
com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:267)
com.ibm.ws.jsp.translator.visitor.JspVisitor.processChildren(JspVisitor.java:309)
com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:268)
com.ibm.ws.jsp.translator.visitor.JspVisitor.processChildren(JspVisitor.java:309)
com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:268)
com.ibm.ws.jsp.translator.visitor.JspVisitor.processChildren(JspVisitor.java:309)
com.ibm.ws.jsp.translator.visitor.JspVisitor.processJspElement(JspVisitor.java:139)
com.ibm.ws.jsp.translator.visitor.JspVisitor.visit(JspVisitor.java:121)
com.ibm.ws.jsp.translator.visitor.generator.GenerateJspVisitor.visit(GenerateJspVisitor.java:137)
com.ibm.ws.jsp.translator.JspTranslator.processVisitors(JspTranslator.java:127)
com.ibm.ws.jsp.translator.utils.JspTranslatorUtil.translateJsp(JspTranslatorUtil.java:182)
com.ibm.ws.jsp.translator.utils.JspTranslatorUtil.translateJspAndCompile(JspTranslatorUtil.java:84)
com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.translateJsp(AbstractJSPExtensionServletWrapper.java:377)
com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper._checkForTranslation(AbstractJSPExtensionServletWrapper.java:345)
com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.checkForTranslation(AbstractJSPExtensionServletWrapper.java:254)
com.ibm.ws.jsp.webcontainerext.AbstractJSPExtensionServletWrapper.handleRequest(AbstractJSPExtensionServletWrapper.java:136)
com.ibm.ws.webcontainer.webapp.WebAppRequestDispatcher.forward(WebAppRequestDispatcher.java:308)
org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1062)
org.apache.struts.tiles.TilesRequestProcessor.doForward(TilesRequestProcessor.java:263)
org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
org.apache.struts.tiles.TilesRequestProcessor.processForwardConfig(TilesRequestProcessor.java:318)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:743)
javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:989)
com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:501)
com.ibm.ws.wswebcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:486)
com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:3184)
com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:254)
com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:811)
com.ibm.ws.wswebcontainer.WebContainer.handleRequest(WebContainer.java:1433)
com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:111)
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:454)
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewInformation(HttpInboundLink.java:383)
com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:263)
com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:165)
com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:136)
com.ibm.io.async.ResultHandler.complete(ResultHandler.java:195)
com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:743)
com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:873)
com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1469)
 

Is there some packaging or file access gotcha I am not aware of that is causing this? I wish the exception was more helpful...

Thanks