How to catch OutOfMemoryError in JVM and run a script if it's caught?

Question

I have a program that sometimes throw OOME, I understand that there is a flag in the JVM options that I can set and whenever a certain Error/Exception appears (such as OOME

Answer 1

I found one suggestion in a forum: catch the OOME in your application (like directly in main, assuming you're single threaded) and do this in the catch handler:

catch (OutOfMemoryError not_again) {
  System.gc();
  System.runFinalization();
  System.gc();
  System.out.println("Your error message");
}

Cleaning up the heap might free just enough memory to produce a last error message before dying.

Answer 2

-XX:OnOutOfMemoryError="cmd args;cmd args"

From: http://www.oracle.com/technetwork/java/javase/tech/vmoptions-jsp-140102.html#DebuggingOptions