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This bug was originally marked as duplicate of bug 237952, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related. Build: NetBeans IDE 8.0 (Build 201403101706) VM: Java HotSpot(TM) 64-Bit Server VM, 24.51-b03, Java(TM) SE Runtime Environment, 1.7.0_51-b13 OS: Windows 7 User Comments: GUEST: Changed from a group with many maven projects to one with one. Maximum slowness yet reported was 20464 ms, average is 20464
Created attachment 146661 [details] nps snapshot
o.n.m.j2ee.persistence.wizard.library.PersistenceLibrarySupport.createLibraries() is called in EDT. Reassigning to javaee/Persistence. Please evaluate, thank you.
it should be rare case now, can postpone.
This old bug may not be relevant anymore. If you can still reproduce it in 8.2 development builds please reopen this issue. Thanks for your cooperation, NetBeans IDE 8.2 Release Boss