java.lang.IllegalStateException: Too many org.netbeans.modules.xml.text.navigator.NavigatorContent$1 (3) in shared RequestProcessor; create your own
   at org.openide.util.RequestProcessor.post(RequestProcessor.java:416)
   at org.netbeans.modules.xml.text.navigator.NavigatorContent.navigate(NavigatorContent.java:179)
   at org.netbeans.modules.xml.text.navigator.NavigatorContent.navigate(NavigatorContent.java:136)
   at org.netbeans.modules.xml.text.navigator.base.AbstractXMLNavigatorPanel.navigate(AbstractXMLNavigatorPanel.java:112)
   at org.netbeans.modules.xml.text.navigator.base.AbstractXMLNavigatorPanel$1.resultChanged(AbstractXMLNavigatorPanel.java:66)
   at org.openide.util.lookup.ProxyLookup$1Notify.run(ProxyLookup.java:173)
   at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:179)
   at org.openide.util.lookup.ProxyLookup.setLookups(ProxyLookup.java:119)
   at org.netbeans.modules.navigator.NavigatorController$ClientsLookup.beforeLookup(NavigatorController.java:764)
   at org.openide.util.lookup.ProxyLookup.lookup(ProxyLookup.java:197)
   at org.netbeans.modules.navigator.NavigatorController.updateContext(NavigatorController.java:351)
   at org.netbeans.modules.navigator.NavigatorController.run(NavigatorController.java:598)
   at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
   at java.awt.EventQueue.dispatchEvent(EventQueue.java:633)
   at org.netbeans.core.TimableEventQueue.dispatchEvent(TimableEventQueue.java:133)
   at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:296)
   at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:211)
   at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:201)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:196)
   at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:188)
   at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)