java.sql.SQLException: Couldn't get connection because we are at maximum connect

SQLException: Couldn't get connection because we are at maximum connect"/>

java.sql.SQLException: Couldn't get connection because we are at maximum connect

java.sql.SQLException: Couldn't get connection because we are at maximum connection count (30/30) and there are none available报错，项目中实际碰到过。下面先讲讲所用到数据库连接池proxool，以下是它的一些基本配置，来源于官网：

[b] maximum-active-time:[/b]

If the housekeeper comes across a thread that has been active for longer than this then it will kill it. So make sure you set this to a number bigger than your slowest expected response! [color=red]Default is 5 minutes[/color].

[b]maximum-connection-count:[/b]

The maximum number of connections to the database. [color=red]Default is 15[/color].

[b]maximum-connection-lifetime:[/b]

The maximum amount of time that a connection exists for before it is killed (milliseconds). [color=red]Default is 4 hours[/color].

[b]maximum-new-connections:[/b]

Deprecated. Use simultaneous-build-throttle instead.

[b]minimum-