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

ulimit -v 102400 
ulimit -d 102400
unitTest.sh

The above should limit your unit test to 1M of virtual memory, and 1M data segment size. When you reach either of those, your process should get ENOMEM. Careful, these restrictions apply for the process / shell where you called them exits; you might want to run them in a subshell.

man 2 setrlimit for details on how that works under the hood. help ulimit for the ulimit command.