mysql5.7.20 reports an error separately from reading and writing, the message is as follows: java.util.NoSuchElementException: Could not create a validated object, cause

mysql5.7.20 does separate error from reading and writing, the information is as follows

java.lang.Exception: poolName=slaves, no valid pools
	at com.meidusa.amoeba.net.poolable.MultipleLoadBalanceObjectPool.borrowObject(MultipleLoadBalanceObjectPool.java:183)
	at com.meidusa.amoeba.mysql.handler.CommandMessageHandler.startSession(CommandMessageHandler.java:633)
	at com.meidusa.amoeba.mysql.handler.MySqlCommandDispatcher.handleMessage(MySqlCommandDispatcher.java:123)
	at com.meidusa.amoeba.mysql.net.MysqlClientConnection$2.run(MysqlClientConnection.java:291)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)
java.util.NoSuchElementException: Could not create a validated object, cause: ValidateObject failed
	at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1191)
	at com.meidusa.amoeba.net.poolable.GenericObjectPool.borrowObject(GenericObjectPool.java:381)
	at com.meidusa.amoeba.mysql.handler.CommandMessageHandler.startSession(CommandMessageHandler.java:633)
	at com.meidusa.amoeba.mysql.handler.MySqlCommandDispatcher.handleMessage(MySqlCommandDispatcher.java:123)
	at com.meidusa.amoeba.mysql.net.MysqlClientConnection$2.run(MysqlClientConnection.java:291)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:619)

solve:

There is a problem with the database configuration in the dbServers.xml file, because the mysql5.5 version has a test database. The mysql5.7 version we are currently using must change the database to mysql. After the modification is completed, restart the system and the system can be used normally.