Greetings,
I and @黄向东 have run through the issue list and closed or resolved some issues, the issues left should be more update-to-date. By the way, we labeled the issues according to the estimated difficulties such as "easy-fix, medium, little-hard, hard, experimental". If you want to contribute to IoTDB, you may choose one of these labeled issues and try fixing it. Be sure to assign the issue to yourself or at least leave a comment that you are working on it. Best, Tian Jiang