Detecting out of memory errors

Question

I would like to provide my system with a way of detecting whether out of memory exception has occurred or not. The aim for this exercise is to expose this flag through JMX a

Answer 1

You can catch any and all uncaught exceptions with the static Thread.setDefaultUncaughtExceptionHandler. Of course, it doesn't help if someone is catching all Throwables. (I don't think anything will, though with an OOME I'd suspect you'd get a cascading effect until something outside the offending try block blew up.) Hopefully the thread would have released enough memory for the exception handler to work; OOM errors do tend to multiply as you try to deal with them.