java.sql.SQLException: Unknown system variable 'query_cache_size'
	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:963)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3966)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3902)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2526)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2673)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2545)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2503)
	at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1369)
	at com.mysql.jdbc.ConnectionImpl.loadServerVariables(ConnectionImpl.java:3833)
	at com.mysql.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:3283)
	at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2297)
	at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2083)
	at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:806)
	at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47)
	at sun.reflect.GeneratedConstructorAccessor164.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)
	at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:410)
	at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:328)
	at com.fr.third.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1461)
	at com.fr.third.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1525)
	at com.fr.third.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2153)