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According to Milan Kubec it started this week. Attaching his thread dump.
Created attachment 631 [details] End of the builders log
I have no clue. Maybe this changed something http://www.netbeans.org/unbranded-source/browse/openide/src/org/openide/nodes/Children.java.diff?r1=1.80&r2=1.81 I really don't know - Yarda, can I assign this to you?
Assigning back to openide.
The problem is in "main". Services.addSection is very badly implemented. The simplest solution is not to try to lock on MUTEX there. postRequest in ServicesChildren.propertyChange should be enough.
Testing the fix. Hopefully will commit soon.
Change in Services.addService commited to the main trunk. Marking as FIXED. If someone can see it after the commit please reopen.
seems like fixed - closed