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And it definitely isn't disconnected. Perhaps it is trying to contact a host that is offline. This has only been happening in this build: Product Version: NetBeans IDE Dev (Build 201612120001) Updates: Updates available Java: 1.8.0_45; Java HotSpot(TM) 64-Bit Server VM 25.45-b02 Runtime: Java(TM) SE Runtime Environment 1.8.0_45-b14 System: Linux version 4.1.13-100.fc21.x86_64 running on amd64; UTF-8; en_US (nb) User directory: /home/toddb/.netbeans/dev Cache directory: /home/toddb/.cache/netbeans/dev