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Product Version = NetBeans IDE 8.0.1 (Build 201408251540) Operating System = Windows 7 version 6.1 running on x86 Java; VM; Vendor = 1.8.0_20 Runtime = Java HotSpot(TM) Client VM 25.20-b23
Created attachment 150516 [details] IDE log
That's because http://plugins.netbeans.org is down.
*** Bug 248710 has been marked as a duplicate of this bug. ***
It must have been a temporary hiccup. It's working fine now so closing.