A dead lock appeared during execution of automated tests of NetBeans IDE. Jemmy library was installing its own EventQueue and it was locked with AWT thread (look at attached thread dump). Source code of QueueTool class can be foud here:

http://jemmy.netbeans.org/source/browse/*checkout*/jemmy/src/org/netbeans/jemmy/QueueTool.java?rev=1.13