This bug was originally marked as duplicate of bug 180815, 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 2 (Build 201102140001)
VM: Java HotSpot(TM) 64-Bit Server VM, 19.0-b09, Java(TM) SE Runtime Environment, 1.6.0_23-b05
nicu2005: open faces-config.xml
Maximum slowness yet reported was 7805 ms, average is 7805
Created attachment 106530 [details]
stuck in org.openide.util.RequestProcessor$Processor.attachTo(), waiting to acquire a lock, i guess.
just one report, quite old and honestly i cannot identify the thread holding a lock. If reproducible, a newer .npss snapshot (instead of current .nps) may be helpful.