关于dbcp配置的问题：报错

dbcp配置如下：

driverClassName=com.mysql.jdbc.Driver
url=jdbc:mysql://localhost:3306/t_xx?autoReconnect=true&useUnicode=true&characterEncoding=utf8
username=root
password=123456

initialSize=2
maxActive=10
maxIdle=2
minIdle=1
maxWait=30000
removeAbandoned=true
removeAbandonedTimeout=180

但是按照这个配置部署项目时，报以下错误:

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was40925 milliseconds ago.The last packet sent successfully to the server was 40925 milliseconds ago, which  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 timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.

请问这个是配置方面的问题吗？如果是，应该如何配置呢？请指导哈...谢谢！