@Test
 public void removeListener() throws InterruptedException, IOException {
   HazelcastClient hClient = getHazelcastClient();
   final IMap<String, String> map = hClient.getMap("removeListener");
   final CountDownLatch entryAddLatch = new CountDownLatch(5);
   final CountDownLatch entryUpdatedLatch = new CountDownLatch(5);
   final CountDownLatch entryRemovedLatch = new CountDownLatch(5);
   CountDownLatchEntryListener<String, String> listener1 =
       new CountDownLatchEntryListener<String, String>(
           entryAddLatch, entryUpdatedLatch, entryRemovedLatch);
   CountDownLatchEntryListener<String, String> listener2 =
       new CountDownLatchEntryListener<String, String>(
           entryAddLatch, entryUpdatedLatch, entryRemovedLatch);
   map.addEntryListener(listener1, true);
   map.put("hello", "world");
   map.put("hello", "new world");
   map.remove("hello");
   Thread.sleep(100);
   assertEquals(4, entryAddLatch.getCount());
   assertEquals(4, entryRemovedLatch.getCount());
   assertEquals(4, entryUpdatedLatch.getCount());
   map.removeEntryListener(listener1);
   map.put("hello", "world");
   map.put("hello", "new world");
   map.remove("hello");
   Thread.sleep(100);
   assertEquals(4, entryAddLatch.getCount());
   assertEquals(4, entryRemovedLatch.getCount());
   assertEquals(4, entryUpdatedLatch.getCount());
 }