There is no error in MySQL5.5 version, and an error in MySQL5.7 version: java.lang.Exception: poolName=slaves, no valid pools

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Error description:
After the service is set up, use the client to connect to the amoeba server to log in to the database, and the database content cannot be viewed
. The data code of the client error:

mysql> show databases;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    1545595021
Current database: *** NONE ***

Code data reported by the amoeba server

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)
......

Cause Analysis

On line 23 of the amoeba database file, the default corresponding MySQL library is text, the MySQL version I use here is 5.7, and the default library is mysql, so I can’t find the default library. The MySQL version I built before is 5.5. Need to be modified

solution

Modify line 23 of the database file of amoeba, the default corresponding MySQL library is modified to mysql

 <property name="schema">mysql</property>