1.问题描述
系统运行阶段出现报错 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 427,583,591 milliseconds ago. The last packet sent successfully to the server was 427,583,592 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 timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
实际上当前数据源配置文件已加上autoReconnect=true，
mysql wait_timeout 值为默认值8小时 28800
mysql版本：5.6.41
数据库链接池：tomcat jdbc
请问该如何解决。
2.相关配置
数据源配置文件：
<bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driver}" />
<property name="url" value="jdbc:mysql://xxxx:3306/xxx?useUnicode=true&characterEncoding=utf-8&autoReconnect=true&failOverReadOnly=false" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxActive" value="100" />
<property name="maxIdle" value="50" />
<property name="minIdle" value="5" />
<property name="maxWait" value="-1" />
<property name="validationQuery" value="SELECT 1" />
<property name="testWhileIdle" value="true" />
<property name="timeBetweenEvictionRunsMillis" value="60000" />
<property name="minEvictableIdleTimeMillis" value="60000" />
<property name="defaultAutoCommit" value="false" />
</bean>
mysql配置文件：
[mysqld]
innodb_buffer_pool_size = 150G
join_buffer_size = 256M
sort_buffer_size = 20M
read_rnd_buffer_size = 2M
datadir=/var/lib/mysql
socket=/var/lib/mysql/mysql.sock
group_concat_max_len = 1024000
symbolic-links=0
sql_mode=NO_ENGINE_SUBSTITUTION,STRICT_TRANS_TABLES
transaction-isolation=READ-COMMITTED
[mysqld_safe]
log-error=/var/log/mysqld.log
pid-file=/var/run/mysqld/mysqld.pid
3.错误信息
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 427,583,591 milliseconds ago. The last packet sent successfully to the server was 427,583,592 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 timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
