java.lang.NullPointerException
   at org.netbeans.modules.deadlock.detector.Detector.printThread(Detector.java:219)
   at org.netbeans.modules.deadlock.detector.Detector.printThreadInfo(Detector.java:201)
   at org.netbeans.modules.deadlock.detector.Detector.detectDeadlock(Detector.java:188)
   at org.netbeans.modules.deadlock.detector.Detector.run(Detector.java:133)
   at java.lang.Thread.run(Thread.java:724)