How to make OutOfMemoryError occur on Linux JVM 64bit

Question

in my unit test I deliberately trying to raise an OutOfMemoryError exception. I use a simple statement like the following:

byte[] block = new byte[128 * 1024         


        

Answer 1

The reason for no OutofMemoryError is that the memory is being allocated in a uncommitted state, with no page.

If you write a non-zero byte into each 4K of the array, that will then cause the memory to be allocated.