#fixed code
                             public V get(Object key) {
		return (V)doOp(ClusterOperation.CONCURRENT_MAP_GET, Serializer.toByte(key), null);
	}
#vulnerable code 
                             public V get(Object key) {
//		MapGetCall mGet = new MapGetCall();
		Packet request = createRequestPacket();
	    
	    request.setOperation(ClusterOperation.CONCURRENT_MAP_GET);
	    request.setKey(Serializer.toByte(key));
	    
	    Packet response = callAndGetResult(request);
	    if(response.getValue()!=null){
	    	return (V)Serializer.toObject(response.getValue());
	    }
	    return null;
	} 
                            #location 9 
                            #vulnerability type NULL_DEREFERENCE