com.sun.jdi.VMDisconnectedException: connection is closed
	at com.sun.tools.jdi.TargetVM.send(TargetVM.java:274)
	at com.sun.tools.jdi.VirtualMachineImpl.sendToTarget(VirtualMachineImpl.java:929)
	at com.sun.tools.jdi.PacketStream.send(PacketStream.java:41)
	at com.sun.tools.jdi.JDWP$ReferenceType$SourceDebugExtension.enqueueCommand(JDWP.java:2495)
	at com.sun.tools.jdi.JDWP$ReferenceType$SourceDebugExtension.process(JDWP.java:2481)
	at com.sun.tools.jdi.ReferenceTypeImpl.sourceDebugExtensionInfo(ReferenceTypeImpl.java:781)
	at com.sun.tools.jdi.ReferenceTypeImpl.defaultStratum(ReferenceTypeImpl.java:814)
	at org.netbeans.modules.debugger.jpda.models.CallStackFrameImpl.getDefaultStratum(CallStackFrameImpl.java:116)
	at org.netbeans.modules.debugger.jpda.ui.CurrentThreadAnnotationListener$3.run(CurrentThreadAnnotationListener.java:232)
	at org.openide.util.RequestProcessor$Task.run(RequestProcessor.java:514)
[catch] at org.openide.util.RequestProcessor$Processor.run(RequestProcessor.java:947)