illegal initialSize 15, maxActive 8错误如下：

driverClassName=com.mysql.cj.jdbc.Driver
url=jdbc:mysql://localhost:3306/test?useSSL=false&useUnicode=true&characterEncoding=UTF-8&serverTimezone=Asia/Shanghai &allowPublicKeyRetrieval=true
username=dev
password=abc123456
initialSize=15
MaxActive=20

错误提示：
"C:\Program Files\Java\jdk1.8.0_162\bin\java.exe" -agentlib:jdwp=transport=dt_socket,address=127.0.0.1:60688,suspend=y,server=n -javaagent:C:\Users\dxz-DC\AppData\Local\JetBrains\IntelliJIdea2021.1\captureAgent\debugger-agent.jar -Dfile.encoding=UTF-8 -classpath "C:\Program Files\Java\jdk1.8.0_162\jre\lib\charsets.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\deploy.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\access-bridge-64.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\cldrdata.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\dnsns.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\jaccess.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\jfxrt.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\localedata.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\nashorn.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\sunec.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\sunjce_provider.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\sunmscapi.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\sunpkcs11.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\ext\zipfs.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\javaws.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\jce.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\jfr.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\jfxswt.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\jsse.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\management-agent.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\plugin.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\resources.jar;C:\Program Files\Java\jdk1.8.0_162\jre\lib\rt.jar;C:\Jdbchomework\out\production\Jdbchomework;C:\Jdbchomework\lib\mysql-connector-java-8.0.26.jar;C:\Jdbchomework\lib\druid-1.1.21.jar;C:\Program Files\JetBrains\IntelliJ IDEA 2021.1.1\lib\idea_rt.jar" com.imooc.homework.jdbc1.sample.DruidSample
Connected to the target VM, address: '127.0.0.1:60688', transport: 'socket'
/C:/Jdbchomework/out/production/Jdbchomework/druid-config.properties
九月 09, 2021 9:29:32 上午 com.alibaba.druid.pool.DruidDataSource error
严重: {dataSource-1} init error
java.lang.IllegalArgumentException: illegal initialSize 15, maxActive 8
	at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:869)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1376)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1372)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:109)
	at com.imooc.homework.jdbc1.sample.DruidSample.main(DruidSample.java:41)

java.lang.IllegalArgumentException: illegal initialSize 15, maxActive 8
	at com.alibaba.druid.pool.DruidDataSource.init(DruidDataSource.java:869)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1376)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:1372)
	at com.alibaba.druid.pool.DruidDataSource.getConnection(DruidDataSource.java:109)
	at com.imooc.homework.jdbc1.sample.DruidSample.main(DruidSample.java:41)
null
Disconnected from the target VM, address: '127.0.0.1:60688', transport: 'socket'

Process finished with exit code 0


尝试过的解决方式：
initialSize、MaxActive的值不能设置为相同，否则也会报类似的错误
​