Both of these exceptions are because we're trying to build paths, to initialise java.io.File objects, which rely on results from ServletContext.getRealPath(String), which always returns null from a WAR deployment on Weblogic 9.

java.lang.NullPointerException
        at java.io.File.<init>(File.java:222)
        at com.icesoft.faces.webapp.http.core.UploadServer$2.upload(UploadServer.java:189)
        at com.icesoft.faces.webapp.http.core.UploadServer$2.servlet(UploadServer.java:112)
        at com.icesoft.faces.webapp.http.servlet.ServletRequestResponse.detectEnvironment(ServletRequestResponse.java:228)
        at com.icesoft.faces.webapp.http.core.UploadServer.service(UploadServer.java:60)
        at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:24)


java.lang.NullPointerException
       at java.io.File.<init>(File.java:194)
       at com.icesoft.faces.component.dataexporter.DataExporterRenderer.createFile(DataExporterRenderer.java:137)
       at com.icesoft.faces.component.dataexporter.DataExporterRenderer.encodeBegin(DataExporterRenderer.java:42)
       at javax.faces.component.UIComponentBase.encodeBegin(UIComponentBase.java:703)
       at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:350)
       at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)
       at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)
       at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:352)
       at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)
       at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)
       at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:352)
       at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)
       at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)
       at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:352)
       at com.icesoft.faces.renderkit.dom_html_basic.DomBasicRenderer.encodeParentAndChildren(DomBasicRenderer.java:359)
       at com.icesoft.faces.renderkit.dom_html_basic.GroupRenderer.encodeChildren(GroupRenderer.java:96)
       at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)
       at com.icesoft.faces.component.util.CustomComponentUtils.renderChild(CustomComponentUtils.java:339)
       at com.icesoft.faces.component.panelstack.PanelStackRenderer.encodeChildren(PanelStackRenderer.java:116)
       at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:721)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:552)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:557)
       at com.icesoft.faces.application.D2DViewHandler.renderResponse(D2DViewHandler.java:505)
       at com.icesoft.faces.application.D2DViewHandler.renderView(D2DViewHandler.java:154)
       at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:107)
       at com.sun.faces.lifecycle.LifecycleImpl.phase(LifecycleImpl.java:245)
       at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:137)
       at com.icesoft.faces.webapp.http.core.JsfLifecycleExecutor.apply(JsfLifecycleExecutor.java:17)
       at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.renderCycle(ReceiveSendUpdates.java:140)
       at com.icesoft.faces.webapp.http.core.ReceiveSendUpdates.service(ReceiveSendUpdates.java:68)
       at com.icesoft.faces.webapp.http.core.RequestVerifier.service(RequestVerifier.java:26)
       at com.icesoft.faces.webapp.http.common.standard.PathDispatcherServer.service(PathDispatcherServer.java:24)
       at com.icesoft.faces.webapp.http.servlet.MainSessionBoundServlet.service(MainSessionBoundServlet.java:160)
       at com.icesoft.faces.webapp.http.servlet.SessionDispatcher$1.service(SessionDispatcher.java:30)
       at com.icesoft.faces.webapp.http.servlet.ThreadBlockingAdaptingServlet.service(ThreadBlockingAdaptingServlet.java:19)
       at com.icesoft.faces.webapp.http.servlet.EnvironmentAdaptingServlet.service(EnvironmentAdaptingServlet.java:63)
       at com.icesoft.faces.webapp.http.servlet.SessionDispatcher.service(SessionDispatcher.java:50)
       at com.icesoft.faces.webapp.http.servlet.SessionVerifier.service(SessionVerifier.java:22)
       at com.icesoft.faces.webapp.http.servlet.PathDispatcher.service(PathDispatcher.java:23)
       at com.icesoft.faces.webapp.http.servlet.MainServlet.service(MainServlet.java:95)
       at javax.servlet.http.HttpServlet.service(HttpServlet.java:856)
       at com.icesoft.faces.webapp.xmlhttp.BlockingServlet.service(BlockingServlet.java:56)
       at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:225)
       at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:127)
       at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:283)
       at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
       at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3214)
       at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
       at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
       at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:1983)
       at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:1890)
at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1344)
       at weblogic.work.ExecuteThread.execute(ExecuteThread.java:209)
       at weblogic.work.ExecuteThread.run(ExecuteThread.java:181)