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When starting a recent trunk build with a clean userdir, the IDE hung up completely showing "Looking for a local mysql installation" operation in progress. When killed manually (Ctrl+C) and restarted with the same userdir it threw an SQLException, see issue 135501.
Can you please do a thread dump and attach? I suspect this is the same issue as 134577 but can't confirm until I see the thread dump. Also, what build are you working off of? Can you try a fresh build and see if it still exists?
It was a manual trunk build. I've updated+rebuilt and now I cannot reproduce the deadlock, though the exception is still there. I'll resolve the issue as WORKSFORME and will reopen attaching a thread dump if I ever see it again.