showcase > ace:breadcrumbMenu
Trying to select more than once the same node or child menuItems is not possible; a server -side error occurs randomly on consecutive attempts to select nodes or child menuItems (all browsers, MyFaces specific).

Steps:
- deploy showcase.war built with MyFaces JSF on Tomcat.
- navigate to the showcase > breadcrumbMenu demo.
- select a 'Province' node (Alberta) -> 'Province: Alberta' node is selected.
- select another 'Province' node (Manitoba) -> 'Province: Alberta' node is deselected and 'Province: Manitoba' node becomes selected.
- select the first 'Province' node again (Alberta) -> 'Province: Manitoba' node is deselected, and 'Alberta' node can no longer be selected.
This can be reproduce also if opening a province node and selecting child menuItems.
The server error is seen randomly after a few selections/deselections have been made.

Note: the node or child menuItem can be re-selected again after contracting/expanding the parent node.

Server error:
org.icefaces.ace.json.JSONException: A JSONArray text must start with '[' at character 0
        at org.icefaces.ace.json.JSONTokener.syntaxError(JSONTokener.java:429)
        at org.icefaces.ace.json.JSONArray.<init>(JSONArray.java:129)
        at org.icefaces.ace.json.JSONArray.<init>(JSONArray.java:173)
        at org.icefaces.ace.component.tree.TreeDecoder.getSelectNodeKey(TreeDecoder.java:207)
        at org.icefaces.ace.component.tree.Tree.getRequestNodeKey(Tree.java:295)
        at org.icefaces.ace.component.tree.Tree.queueEvent(Tree.java:280)
        at org.icefaces.ace.component.ajax.AjaxBehaviorRenderer.decode(AjaxBehaviorRenderer.java:60)
        at javax.faces.component.behavior.ClientBehaviorBase.decode(ClientBehaviorBase.java:63)
        at org.icefaces.ace.renderkit.CoreRenderer.decodeBehaviors(CoreRenderer.java:349)
        at org.icefaces.ace.renderkit.CoreRenderer.decodeBehaviors(CoreRenderer.java:327)
        at org.icefaces.ace.component.tree.TreeRenderer.decode(TreeRenderer.java:68)
        at javax.faces.component.UIComponentBase.decode(UIComponentBase.java:478)
        at org.icefaces.ace.component.tree.Tree.processDecodes(Tree.java:332)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1401)
        at javax.faces.component.UIForm.processDecodes(UIForm.java:154)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1401)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1401)
        at org.icefaces.ace.component.panel.Panel.processDecodes(Panel.java:117)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1401)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1401)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1401)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1401)
        at javax.faces.component.UIComponentBase.processDecodes(UIComponentBase.java:1401)
        at javax.faces.component.UIViewRoot._processDecodesDefault(UIViewRoot.java:1689)
        at javax.faces.component.UIViewRoot.access$500(UIViewRoot.java:77)
        at javax.faces.component.UIViewRoot$ApplyRequestValuesPhaseProcessor.process(UIViewRoot.java:1780)
        at javax.faces.component.UIViewRoot._process(UIViewRoot.java:1655)
        at javax.faces.component.UIViewRoot.processDecodes(UIViewRoot.java:869)
        at org.apache.myfaces.lifecycle.ApplyRequestValuesExecutor.execute(ApplyRequestValuesExecutor.java:42)
        at org.apache.myfaces.lifecycle.LifecycleImpl.executePhase(LifecycleImpl.java:196)
        at org.apache.myfaces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:143)
        at javax.faces.webapp.FacesServlet.service(FacesServlet.java:198)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:305)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:51)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.icesoft.util.servlet.RequestLoggerFilter.doFilter(RequestLoggerFilter.java:74)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.icesoft.util.servlet.CustomHeaderFilter.doFilter(CustomHeaderFilter.java:82)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:243)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:210)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:222)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:100)
        at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:953)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
        at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1041)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:603)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:312)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:744)