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[ BUILD # : 201211020750 ] [ JDK VERSION : 1.7.9 ] When testing the Netbeans 7.3 beta 2 build my X session was blocked and Netbeans stopped working. Happened when Netbeans was just started and I clicked on the menu in order to obtain the build number. I was able to obtain a threaddump from the console with the jcmd cli tool - I am not sure if this could be a JDK problem instead of Netbeans/RCP. (The locks seem to be owned by AWT threads?)
Created attachment 127055 [details] Thread dump of netbeans deadlock
I had to kill the JVM with -9 from the console in order to be able to use my X session again. This was really frightening.
Please switch to promoted builds of 7u10, where this JDK bug is fixed, available at http://jdk7.java.net/download.html *** This bug has been marked as a duplicate of bug 213926 ***