tracker.recordFetch(cn0_2, new ByteArray(value4));
tracker.recordFetch(cn0_3, new ByteArray(value4));
assertNull(tracker.nextFinished());
tracker.finishAll();
assertEquals(new ByteArray(value3), tracker.nextFinished());
assertEquals(new ByteArray(value4), tracker.nextFinished());
assertNull(tracker.nextFinished());
}