问题：会话是sleeping的，但是open_tran 不是0
https://docs.microsoft.com/en-us/answers/questions/100075/sleeping-sessions-with-old-open-transactions-issue.html
https://www.cnblogs.com/OwenZeng/p/5653428.html
https://blog.csdn.net/z10843087/article/details/60129342