OpenWebstart get stuck on certificate selection screen (multi-threading with event dispatch thread hack) #962
Description
I was able to reproduce this with a self-issued certificate on localhost.
The problem exists when doing a backend call in a SwingUtilities.invokeLater at the same time as a background thread calls a the backend to the server with a broken certificate.
Result: the certificate dialog and the UI are completely frozen.
Now it's super easy to reproduce, see my comment:
karakun/OpenWebStart#594 (comment)
I suspect that the locking does not work properly in this case, in the following section:
message.lock = null;
...
// background thread
message.lock = new Semaphore(0);
...
message.lock.acquire();
and most likely both call JNLPRuntime.getSecurityDialogHandler().postMessage(message);
btw this issue was first raised here: karakun/OpenWebStart#594
but the broken code is in this repo (14 year old code ... :-))