alibaba druid
FAQ · alibaba/druid Wiki
https://github.com/alibaba/druid/wiki/FAQ
sql 连接数不释放 ，Druid异常：wait millis 40000, active 600, maxActive 600 - Venetian - 博客园
https://www.cnblogs.com/catalina-/p/6001906.html
使用druid连接池带来的坑testOnBorrow=false - lx的博客 - ****博客
https://blog.****.net/lx348321409/article/details/76095751