protected void setUp() {
   try {
     super.setUp();
     mc.asyncBopDelete(key, 0, 100, ElementFlagFilter.DO_NOT_FILTER, 0, true)
         .get(1000, TimeUnit.MILLISECONDS);
   } catch (Exception e) {
     e.printStackTrace();
   }
 }
 @Override
 protected void tearDown() throws Exception {
   mc.delete(KEY).get();
   super.tearDown();
 }
 @Override
 protected void setUp() throws Exception {
   super.setUp();
   mc.delete(KEY).get();
   Assert.assertNull(mc.asyncGetAttr(KEY).get());
 }