hollow/src/main/java/com/netflix/hollow/core/memory/ByteArrayOrdinalMap.java
private AtomicLongArray emptyKeyArray(int size) {
        AtomicLongArray arr = new AtomicLongArray(size);
        // Volatile store not required, could use plain store
        // See VarHandles for JDK >= 9
        for (int i = 0; i < arr.length(); i++) {
            arr.lazySet(i, EMPTY_BUCKET_VALUE);
        }
        return arr;
    }
private AtomicLongArray emptyKeyArray(int size) {
        AtomicLongArray arr = new AtomicLongArray(size);
        // Volatile store not required, could use plain store
        // See VarHandles for JDK >= 9
        for (int i = 0; i < arr.length(); i++) {
            arr.lazySet(i, EMPTY_BUCKET_VALUE);
        }
        return arr;
    }
Create an AtomicLongArray of the specified size, each value in the array will be EMPTY_BUCKET_VALUE