PlacementMonitor.locatedFileStatusCache.remove();
PlacementMonitor placementMonitor = new PlacementMonitor(conf);
placementMonitor.start();
BlockMover blockMover = placementMonitor.blockMover;
TestPlacementMonitor tpm = new TestPlacementMonitor();
FakeExecutorService fakeBlockMover = tpm.new
FakeExecutorService();
FakeBlockAndDatanodeResolver resolver = tpm.new
FakeBlockAndDatanodeResolver();
blockMover.executor = fakeBlockMover;
try {