This bug was originally marked as duplicate of bug 202624, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE 8.2 (Build 201609300101)
VM: Java HotSpot(TM) 64-Bit Server VM, 25.121-b13, Java(TM) SE Runtime Environment, 1.8.0_121-b13
GUEST: Just installed full version, setted the jdk and started a new java project. Stuck for 75 sec on activating JavaSe
Maximum slowness yet reported was 75214 ms, average is 75214
Created attachment 163542 [details]