Warning: To avoid potential deadlock, operations that may block, such as  networking, should be performed in a different

这两天碰到一个问题，在正常查询数据时，没有问题，但在使用多线程查询数据导出时，会报以下错误： 2020-05-21 08:40:3

1、遇到一个报错： (No operations allowed after connection closed.). Possibly consider using a shorter maxLifetime val