#vulnerable code 
                                public T blpopObject(int timeout, String key, Class clazz) {
        this.setSchema(clazz);
        Jedis jedis = null;
        try {
            List<byte[]> bytes = jedis.blpop(timeout, key.getBytes());
            if (bytes == null || bytes.size() == 0) {
                return null;
            }
            return getBytes(bytes.get(1));
        } finally {
            jedis.close();
        }
    } 
                            #location 5 
                            #vulnerability type NULL_DEREFERENCE
#fixed code
                                public T blpopObject(int timeout, String key, Class clazz) {
        this.setSchema(clazz);
        Jedis jedis = null;
        try {
            jedis = jedisPool.getResource();
            List<byte[]> bytes = jedis.blpop(timeout, key.getBytes());
            if (bytes == null || bytes.size() == 0) {
                return null;
            }
            return getBytes(bytes.get(1));
        } finally {
            jedis.close();
        }
    }