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This bug was originally marked as duplicate of bug 246893, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.1 (Build 201510222201) VM: Java HotSpot(TM) 64-Bit Server VM, 25.60-b23, Java(TM) SE Runtime Environment, 1.8.0_60-b27 OS: Mac OS X User Comments: GUEST: rename directory Stacktrace: org.netbeans.modules.deadlock.detector.Detector$DeadlockDetectedException: Thread-3 at sun.nio.fs.PollingWatchService$PollingWatchKey.cancel(PollingWatchService.java:306) at sun.nio.fs.PollingWatchService$PollingWatchKey.poll(PollingWatchService.java:329) at sun.nio.fs.PollingWatchService$PollingWatchKey$1.run(PollingWatchService.java:288) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
Created attachment 163364 [details] stacktrace