com.sun.jdi.request.InvalidRequestStateException: step request instance of java.lang.Thread(name='http-8080-2', id=1455) (deleted)
	at com.sun.tools.jdi.EventRequestManagerImpl$EventRequestImpl.invalidState(EventRequestManagerImpl.java:96)
	at com.sun.tools.jdi.EventRequestManagerImpl$ClassVisibleEventRequestImpl.addClassExclusionFilter(EventRequestManagerImpl.java:272)
	at org.netbeans.modules.debugger.jpda.jdi.request.StepRequestWrapper.addClassExclusionFilter(StepRequestWrapper.java:62)
	at org.netbeans.modules.debugger.jpda.actions.StepIntoNextMethod.addPatternsToRequest(StepIntoNextMethod.java:437)
	at org.netbeans.modules.debugger.jpda.actions.StepIntoNextMethod.propertyChange(StepIntoNextMethod.java:189)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:333)
	at java.beans.PropertyChangeSupport.firePropertyChange(PropertyChangeSupport.java:270)
	at org.netbeans.modules.debugger.jpda.actions.SmartSteppingFilterImpl.addExclusionPatterns(SmartSteppingFilterImpl.java:95)
	at org.netbeans.modules.debugger.jpda.ui.SmartSteppingImpl.addExclusionPatterns(SmartSteppingImpl.java:115)
	at org.netbeans.modules.debugger.jpda.ui.SmartSteppingImpl.stopHere(SmartSteppingImpl.java:108)
	at org.netbeans.modules.debugger.jpda.actions.CompoundSmartSteppingListener.stopHere(CompoundSmartSteppingListener.java:104)
	at org.netbeans.modules.debugger.jpda.actions.StepIntoNextMethod.exec(StepIntoNextMethod.java:267)
	at org.netbeans.modules.debugger.jpda.util.Operator$1.run(Operator.java:344)
[catch] at java.lang.Thread.run(Thread.java:613)