Program: 48063
Project: 48063
Buggy source:
/** 
 * Test for issue #259.
 */
@Test public void testBackupRemoveWhenOwnerNodeDead() throws InterruptedException {
  final TestHazelcastInstanceFactory nodeFactory=createHazelcastInstanceFactory(2);
  final String name=MAP_NAME;
  final HazelcastInstance hz=nodeFactory.newHazelcastInstance();
  final HazelcastInstance hz2=nodeFactory.newHazelcastInstance();
  final IMap<Object,Object> map=hz2.getMap(name);
  final int size=100000;
  final int threads=100;
  ExecutorService ex=Executors.newFixedThreadPool(threads);
  final int loadCount=10;
  final CountDownLatch loadLatch=new CountDownLatch(loadCount);
  for (int i=0; i < loadCount; i++) {
    final int n=i;
    ex.execute(new Runnable(){
      public void run(){
        int chunk=size / loadCount;
        for (int j=(n * chunk); j < (n + 1) * chunk; j++) {
          map.put(j,j);
        }
        loadLatch.countDown();
      }
    }
);
  }
  loadLatch.await();
  new Thread(){
    public void run(){
      while (hz.getMap(name).size() > size / 2) {
        try {
          sleep(5);
        }
 catch (        InterruptedException ignored) {
          return;
        }
      }
      TestUtil.terminateInstance(hz);
    }
  }
.start();
  final int chunk=size / threads;
  final CountDownLatch latch=new CountDownLatch(threads);
  for (int i=0; i < threads; i++) {
    final int n=i;
    ex.execute(new Runnable(){
      public void run(){
        for (int j=(n * chunk); j < (n + 1) * chunk; j++) {
          map.remove(j);
          try {
            Thread.sleep(1);
          }
 catch (          InterruptedException ignored) {
          }
        }
        latch.countDown();
      }
    }
);
  }
  try {
    assertTrue(latch.await(5,TimeUnit.MINUTES));
    assertEquals("String_Node_Str",0,map.size());
  }
  finally {
    ex.shutdown();
  }
}

Fixed version (ground truth):
/** 
 * Test for issue #259.
 */
@Test public void testBackupRemoveWhenOwnerNodeDead() throws InterruptedException {
  final TestHazelcastInstanceFactory nodeFactory=createHazelcastInstanceFactory(2);
  final String name=MAP_NAME;
  final HazelcastInstance hz=nodeFactory.newHazelcastInstance();
  final HazelcastInstance hz2=nodeFactory.newHazelcastInstance();
  final IMap<Integer,Integer> map=hz2.getMap(name);
  final int size=100000;
  final int threads=100;
  ExecutorService ex=Executors.newFixedThreadPool(threads);
  final int loadCount=10;
  final CountDownLatch loadLatch=new CountDownLatch(loadCount);
  for (int i=0; i < loadCount; i++) {
    final int n=i;
    ex.execute(new Runnable(){
      public void run(){
        int chunk=size / loadCount;
        for (int j=(n * chunk); j < (n + 1) * chunk; j++) {
          map.put(j,j);
        }
        loadLatch.countDown();
      }
    }
);
  }
  loadLatch.await();
  new Thread(){
    public void run(){
      while (hz.getMap(name).size() > size / 2) {
        try {
          sleep(5);
        }
 catch (        InterruptedException ignored) {
          return;
        }
      }
      TestUtil.terminateInstance(hz);
    }
  }
.start();
  final int chunk=size / threads;
  final CountDownLatch latch=new CountDownLatch(threads);
  for (int i=0; i < threads; i++) {
    final int n=i;
    ex.execute(new Runnable(){
      public void run(){
        for (int j=(n * chunk); j < (n + 1) * chunk; j++) {
          map.remove(j);
          try {
            Thread.sleep(1);
          }
 catch (          InterruptedException ignored) {
          }
        }
        latch.countDown();
      }
    }
);
  }
  try {
    assertTrue(latch.await(5,TimeUnit.MINUTES));
    assertEquals("String_Node_Str",0,map.size());
  }
  finally {
    ex.shutdown();
  }
}