It was connected to the hive server and queried normally. However, EOF occurred in the middle of the fetchone process. It worked fine when it was re-executed. What's the reason? <img width="1062" alt="스크린샷 2021-05-11 오후 6 26 17" src="https://user-images.githubusercontent.com/44783473/117792593-62548480-b286-11eb-9dd3-42853b96193a.png">