mysql5.7.20做从读写分离报错，信息如下java.util.NoSuchElementException: Could not create a validated object, cause

mysql5.7.20做从读写分离报错，信息如下

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)

解决：

dbServers.xml文件中数据库配置有问题，因为mysql5.5版本有test数据库，我们目前用的mysql5.7版本，必须把数据库修改为mysql，修改完成后重启，系统正常使用。