Mybatis报错poolPingQuery?报错

<dataSource type="POOLED">
                <property name="driver" value="${driver}" />
                <property name="url" value="${url}" />
                <property name="username" value="${username}" />
                <property name="password" value="${password}" />
                <property name="poolMaximumActiveConnections" value="900" /><!-- 同一时间内最大连接数 -->
                <property name="poolMaximumIdleConnections" value="100" /><!-- 连接最大空闲数目 -->
                <property name="poolMaximumCheckoutTime" value="10000" /><!-- 连接被每个任务占用的最大时间 -->
                <property name="poolTimeToWait" value="5000" /><!-- 连接池中无可用连接时，线程的等待时间 -->
                <property name="poolPingQuery" value="select now()" />
                <property name="poolPingEnabled" value="true" />
            </dataSource>

Reader reader = Resources.getResourceAsReader(DATA_MAPPER_FILE);
		DBConfig dbConfig = SystemConfig.getDataDBConfig();
		Properties properties = new Properties();
		properties.put("driver", "com.mysql.jdbc.Driver");
		String url = "jdbc:mysql://"
				+ host
				+ ":"
				+ port
				+ "/"
				+ dbName
				+ "?autoReconnect=true&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true";
		properties.put("url", url);
		properties.put("username", "usr");
		properties.put("password", "password");
		dataSessionFactory = new SqlSessionFactoryBuilder().build(reader,
				properties);
		reader.close();

178262497 [pool-3-thread-300] WARN org.apache.ibatis.datasource.pooled.PooledDataSource - Execution of ping query 'select now()' failed: The last packet successfully received fr
om the server was 133,200,879 milliseconds ago.  The last packet sent successfully to the server was 133,200,879 milliseconds ago. is longer than the server configured value of
'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeout
s, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.