java.lang.NullPointerException
        at org.netbeans.modules.web.core.jsploader.BaseJspEditorSupport$4.propertyChange(BaseJspEditorSupport.java:176)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:339)
        at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:276)
        at org.openide.text.CloneableEditorSupport.firePropertyChange(CloneableEditorSupport.java:527)
        at org.openide.text.CloneableEditorSupport.fireDocumentChange(CloneableEditorSupport.java:2320)
        at org.openide.text.CloneableEditorSupport.closeDocument(CloneableEditorSupport.java:2201)
        at org.openide.text.CloneableEditorSupport.getDocument(CloneableEditorSupport.java:905)
        at org.netbeans.modules.parsing.api.Source.getDocument(Source.java:242)
        at org.netbeans.modules.parsing.api.Source.createSnapshot(Source.java:286)
        at org.netbeans.modules.parsing.impl.SourceCache.createSnapshot(SourceCache.java:141)
        at org.netbeans.modules.parsing.impl.SourceCache.getSnapshot(SourceCache.java:120)
        at org.netbeans.modules.parsing.impl.SourceCache.createTasks(SourceCache.java:362)
        at org.netbeans.modules.parsing.impl.SourceCache.scheduleTasks(SourceCache.java:405)
        at org.netbeans.modules.parsing.spi.Scheduler$1.run(Scheduler.java:158)
Caused: org.openide.util.RequestProcessor$SlowItem: task failed due to: java.lang.NullPointerException
        at org.openide.util.RequestProcessor$Task.schedule(RequestProcessor.java:655)
        at org.netbeans.modules.parsing.spi.Scheduler.schedule(Scheduler.java:162)
        at org.netbeans.modules.parsing.impl.SelectedNodesScheduler.access$200(SelectedNodesScheduler.java:63)
        at org.netbeans.modules.parsing.impl.SelectedNodesScheduler$1.run(SelectedNodesScheduler.java:88)
        at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:602)
        at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:1084)