com.sun.jdi.IncompatibleThreadStateException
        at com.sun.tools.jdi.ThreadReferenceImpl.frames(ThreadReferenceImpl.java:354)
        at com.sun.tools.jdi.ThreadReferenceImpl.frame(ThreadReferenceImpl.java:279)
        at org.netbeans.modules.debugger.jpda.evaluator.VMEngine.<init>(VMEngine.java:44)
        at org.netbeans.modules.debugger.jpda.evaluator.Evaluator.evaluate(Evaluator.java:39)
        at org.netbeans.modules.debugger.jpda.JPDAWatch.refreshValue(JPDAWatch.java:237)
        at org.netbeans.modules.debugger.jpda.JPDAWatch.validate(JPDAWatch.java:115)
        at org.netbeans.modules.debugger.delegator.DelegatingWatch.validate(DelegatingWatch.java:119)
        at org.netbeans.modules.debugger.support.util.ValidatorImpl$1.run(ValidatorImpl.java:106)
        at org.netbeans.modules.debugger.support.util.Task.run(Task.java:113)
        at org.netbeans.modules.debugger.support.util.RequestProcessor$ProcessorThread.run(RequestProcessor.java:565)