java.lang.Exception: Scan canceled.
   at java.lang.Thread.getStackTrace(Thread.java:1479)
   at org.netbeans.modules.parsing.impl.indexing.LogContext.create(LogContext.java:113)
   at org.netbeans.modules.parsing.impl.indexing.LogContext.create(LogContext.java:106)
   at org.netbeans.modules.parsing.impl.indexing.PathRegistry.scheduleFirer(PathRegistry.java:820)
   at org.netbeans.modules.parsing.impl.indexing.PathRegistry.resetCacheAndFire(PathRegistry.java:814)
   at org.netbeans.modules.parsing.impl.indexing.PathRegistry.access$500(PathRegistry.java:85)
   at org.netbeans.modules.parsing.impl.indexing.PathRegistry$Listener.pathsRemoved(PathRegistry.java:1078)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAccessorImpl.java:0)
   at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
   at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
   at java.lang.reflect.Method.invoke(Method.java:597)
   at org.openide.util.WeakListenerImpl$ProxyListener.invoke(WeakListenerImpl.java:457)
   at $Proxy6.pathsRemoved(.java:0)
   at org.netbeans.api.java.classpath.GlobalPathRegistry.unregister(GlobalPathRegistry.java:265)
   at org.netbeans.modules.apisupport.project.NbModuleProject$OpenedHook.projectClosed(NbModuleProject.java:718)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:87)
   at org.netbeans.spi.project.ui.support.UILookupMergerSupport$OpenHookImpl.projectClosed(UILookupMergerSupport.java:246)
   at org.netbeans.spi.project.ui.ProjectOpenedHook$1.projectClosed(ProjectOpenedHook.java:87)
   at org.netbeans.modules.project.ui.OpenProjectList.notifyClosed(OpenProjectList.java:1162)
   at org.netbeans.modules.project.ui.OpenProjectList.access$2500(OpenProjectList.java:134)
   at org.netbeans.modules.project.ui.OpenProjectList$9.run(OpenProjectList.java:839)
   at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:1452)
   at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:2032)