This bug was originally marked as duplicate of bug 184613, that is already resolved. This bug is still valid, so this seems to be another bug, but it might be related.
Build: NetBeans IDE 7.0 Beta (Build 201011152355)
VM: Java HotSpot(TM) 64-Bit Server VM, 17.1-b03, Java(TM) SE Runtime Environment, 1.6.0_22-b04
OS: Windows 7
theradman: Editing persistence unit
Maximum slowness yet reported was 3045 ms, average is 3045
Created attachment 104322 [details]
Snapshot shows that this bug is related to j2ee component.
It's latest and smallest one from persistence 4 out of 5 reports have nothing with persistence and is likely related to platform as it was reported. persistence report is separated and push back to platform.
No new report since 2011-03-10: