Yanming Zhou

You should update your credentials by `HikariConfig::setCredentials`.

I don't think there is a standard way to distinguish such SQLException for every database, and what if the password is correct later?

You should submit an PR instead of posting code snippet.

You should add corresponding tests.

I think it could be caused by SQL Server JDBC Driver itself, have you tried to reproduce by other database such as MySQL PostgreSQL?

I think failed tests are not caused by this PR, they fail with other PR too, but passed in local. Caused by: ``` java.io.IOException: No such file or directory at...

`Connection` keep open for reusing, that's the purpose of pool, what's the problem here?

> > `Connection` keep open for reusing, that's the purpose of pool, what's the problem here? > > The problem is that they are not being reused as well.. Those...

> so total should be 40 The total should be 40 to 200 because the `maximumPoolSize` is 50 if concurrency happens, and the total should be 40 after `idleTimeout` elapsed.

It should be closed since fixed.