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 * 1024 * 1024];

The code works on Win7 64bit with jdk6u21 64bit. But when I run this on Centos 5 64bit with jdk6u21 no OutOfMemoryError thrown, even when I make the size of the array bigger.

Any idea?

Answer 1

If you just want to consume all the memory do the following:

    try {
        List<Object> tempList = new ArrayList<Object>();
        while (true) {
            tempList.add(new byte[128 * 1024 * 1024 * 1024]);
        }
    } catch (OutOfMemoryError OME) {
       // OK, Garbage Collector will have run now...
    }