FileSystem fs = cluster.getFileSystem();
WaitingRoom wr = new WaitingRoom(conf);
WaitingRoomPurger purger = wr.getPurger();
SnapshotNode ssNode = new SnapshotNode(conf);
ssNode.shutdownWaitingRoomPurger();
String wrPath = conf.get("fs.snapshot.waitingroom", "/.WR");
String ssDir = conf.get("fs.snapshot.dir", "/.SNAPSHOT");
Path foo = new Path("/foo");