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Deadlock happens on one machine (Ubuntu 12.04) once or twice in one testrun containing a lot of testsuites (IDE starts approximately 100 times).
Created attachment 120909 [details] Full stack dump on deadlock while IDE starting in test run
There are multiple threads running org.openide.loaders.FolderInstance blocking each other.
I don't think it is good evaluation. Imho, there is no AWT dispatch thread. I am not sure how Swing can run without EDT, I am assuming it is a JDK problem. But I leave it up to Standa, our Swing expert to confirm/deny.
Which Java version? How are the tests started and which tests are those?
I think it's duplicate of issue 211305 ... please confirm, tests are running in headless mode on JDK 7u4 and later ? *** This bug has been marked as a duplicate of bug 211305 ***
Yes, we use java 7u4 on that machine. It is CND functional tests but IDE hangs while warming up before any of tests starts.