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Created attachment 155995 [details] Thread Dump I am using the Zip Java EE version of NetBeans. I noticed this after installing the C/C++ plugin on the latest dev version. When I have this and some other plugins installed (C/C++, PHP, Python) it happens more frequently. With the extra plugins installed, it happens about 20%-30% of the time restarting NetBeans 0 - 5 seconds after shutdown. It seems to occur more frequently after browsing the Options panels of the extra plugins, waiting for C/C++ tool validation to complete, then shutdown and restart. The deadlock occurs at the startup splash screen when it indicates "Starting modules..." See attached thread dump. "Found 1 deadlock." Product Version: NetBeans IDE Dev (Build 201509080002) Java: 1.8.0_51; Java HotSpot(TM) 64-Bit Server VM 25.51-b03 Runtime: Java(TM) SE Runtime Environment 1.8.0_51-b16 System: Windows 7 version 6.1 running on amd64; Cp1252; en_US (nb) It happens with JDK 1.8.0_60 too.
Reassigned for further evaluation.
*** This bug has been marked as a duplicate of bug 255095 ***