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Connecting to network from event dispatch thread is a bad practice as it can freeze application. One way how to tell people not to do it is to give them an alarm on such activity.
Created attachment 48815 [details] patch for security manager
Good idea. We have tests for FS I/O in EDT now. Let's test also for the network I/O in EDT... Tomasi, can you investigate?
(In reply to comment #2) > Good idea. We have tests for FS I/O in EDT now. Let's test also for the network > I/O in EDT... > > Tomasi, can you investigate? Yes, I will take a look.