Several failures were seen in the showcase application when testing with Amazon AWS Weblogic 12.2.1.1.0.
Please see Part 1 and Part 2.

Failures Part 1:
All browsers - Interacting with these demos causes a Server Internal error
accordion > Pane Change
checkboxButton > Custom Style
dataTable > ALL Demos except Overview
maskedEntry > Label Position, Required Styling
menu > Layout, Events, Effects
menuBar > Effects, Click to Display
panel > Overview, Listener
progressBar > Polling, Client & Server
resizable > Resize Listener
sliderEntry > Input, Listener, Submit
textEntry/textAreaEntry > AutoTab, Label Position, Indicator text, Required Styling
tooltip > Delegate
tree > Lazy Loading, Drag Drop, Selection

Stack Trace:
java.lang.NullPointerException
        at org.icefaces.impl.context.DOMPartialRenderCallback.visit(DOMPartialViewContext.java:814)
        at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1611)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)
        at javax.faces.component.UIForm.visitTree(UIForm.java:371)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)
        at org.icefaces.impl.context.DOMPartialViewContext.renderSubtrees(DOMPartialViewContext.java:466)
        at org.icefaces.impl.context.DOMPartialViewContext.processPartial(DOMPartialViewContext.java:174)
        at javax.faces.component.UIViewRoot.encodeChildren(UIViewRoot.java:973)
        at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1778)
        at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:426)
        at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:125)
        at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286)
        at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
        at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
        at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:604)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:286)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:260)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:137)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:350)
        at weblogic.servlet.internal.TailFilter.doFilter(TailFilter.java:25)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
        at weblogic.servlet.internal.RequestEventsFilter.doFilter(RequestEventsFilter.java:32)
        at weblogic.servlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:78)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.wrapRun(WebAppServletContext.java:3683)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3649)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:326)
        at weblogic.security.service.SecurityManager.runAsForUserCode(SecurityManager.java:197)
        at weblogic.servlet.provider.WlsSecurityProvider.runAsForUserCode(WlsSecurityProvider.java:203)
        at weblogic.servlet.provider.WlsSubjectHandle.run(WlsSubjectHandle.java:71)
        at weblogic.servlet.internal.WebAppServletContext.doSecuredExecute(WebAppServletContext.java:2433)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2281)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2259)
        at weblogic.servlet.internal.ServletRequestImpl.runInternal(ServletRequestImpl.java:1686)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1646)
        at weblogic.servlet.provider.ContainerSupportProviderImpl$WlsRequestExecutor.run(ContainerSupportProviderImpl.java:270)
        at weblogic.invocation.ComponentInvocationContextManager._runAs(ComponentInvocationContextManager.java:348)
        at weblogic.invocation.ComponentInvocationContextManager.runAs(ComponentInvocationContextManager.java:333)
        at weblogic.work.LivePartitionUtility.doRunWorkUnderContext(LivePartitionUtility.java:54)
        at weblogic.work.PartitionUtility.runWorkUnderContext(PartitionUtility.java:41)
        at weblogic.work.SelfTuningWorkManagerImpl.runWorkUnderContext(SelfTuningWorkManagerImpl.java:640)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:406)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:346)
<Jul 11, 2016, 3:16:55,681 PM EDT> <Error> <javax.enterprise.resource.webcontainer.jsf.application> <BEA-000000> <Error Rendering View[/showcase.xhtml]
java.lang.NullPointerException
        at org.icefaces.impl.context.DOMPartialRenderCallback.visit(DOMPartialViewContext.java:814)
        at com.sun.faces.component.visit.PartialVisitContext.invokeVisitCallback(PartialVisitContext.java:183)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1611)
        at javax.faces.component.UIComponent.visitTree(UIComponent.java:1622)
        at javax.faces.component.UIForm.visitTree(UIForm.java:371)
        Truncated. see log file for complete stacktrace

Failures Part 2:
For the following issues, no server or console errors were logged:

autoCompleteEntry > all demos except Overview
1.) List does not render when entering text into the autoCompleteEntry
2.) After failure from #1 you can not navigate to any further demos in the autoCompleteEntry group.

comboBox > all demos except Overview
1.) Selections made from the comboBoxes are not updated on page.
2.) After failure from #1 you can not navigate to any further demos in the comboBox group.

confirmationDialog > all demos
1.) Selections made are not updated on page.
2.) After failure from #1 you can not navigate to any further demos in the confirmationDialog group.

contextMenu> all demos except Overview
1.) Selections made are not updated on page.
2.) After failure from #1 you can not navigate to any further demos in the contextMenu group.

dataExporter > all demos except Overview
1.) Files can not be exported.
2.) After failure from #1 you can not navigate to any further demos in the dataExporter group.

dateTimeEntry> all demos except Overview
1.) Popup calendars not rendered, page not updated after submit
2.) After failure from #1 you can not navigate to any further demos in the dateTimeEntry group.

dialog > effects and Size
1.) Effects not rendered, page not updated after submit.
2.) After failure from #1 you can not navigate to any further demos in the dialog group.

draggable/droppable > Effects and Size
1.) Changes to settings are not applied.
2.) After failure from #1 you can not navigate to any further demos in the draggable/droppable group.

list > all demos except Overview
1.) Page is not updated when selecting from list.
2.) After failure from #1 you can not navigate to any further demos in the list group.

menuBar > Dynamic
1.) MenuBar does not render
2.) After failure from #1 you can not navigate to any further demos in the menuBar group.

panelStack > all demos except Overview
1.) Values fail to update.
2.) After failure from #1 you can not navigate to any further demos in the panelStack group.

progressBar > Push
1.) ProgressBar can not be activated.

progressBar > Client Side
1.) ProgressBar can be started but fails when an NCI page popup appears.
2.) After failure from #1 you can not navigate to any further demos in the progressBar group.

radioButton > Overview, Custom Style
1.) NCI appears after selecting the buttons a few times.
2.) Button selections do not persist

selectMenu, simpleSelectOneMenu > all demos except Overview
1.) Values fail to update.
2.) After failure from #1 you can not navigate to any further demos in the selectMenu/simpleSelect groups.

tabSet > Overview, Server Side, Proxy
1.) Can not change tabs.
2.) After failure from #1 you can not navigate to any further demos in the tabSet group.

In the failing demos that use jsf or ace input components, selecting a new value just resets to the default value.