Grails 2.3.0 和 mysql 连接超时

我有一个 Grails 2.2.3 应用程序，使用此配置连接到 mysql 数据库：

 production {
    dataSource {
        dbCreate = "update" // one of 'create', 'create-drop','update'
        url = "jdbc:mysql://localhost/database?autoReconnect=true"

        pooled = true
        properties {
            maxActive = 50
            maxIdle = 25
            minIdle = 5
            initialSize = 5
            minEvictableIdleTimeMillis = 1800000
            timeBetweenEvictionRunsMillis = 1800000
            maxWait = 10000

        }


    }

}

升级到 Grails 2.3.0 后，它停止工作，并且在应用程序上周末不活动后，我收到此异常：

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 50,139,380 milliseconds ago.  The last packet sent successfully to the server was 50,139,380 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.
at com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116)
at com.mysql.jdbc.MysqlIO.send(MysqlIO.java:3352)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1971)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2151)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2619)
at com.mysql.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:4997)
... 5 more
Caused by: java.net.SocketException: Write failed: Broken pipe
at jrockit.net.SocketNativeIO.socketWrite(SocketNativeIO.java:46)

有任何想法吗 ？

尝试将以下“testOn”属性添加到连接池配置中：

  properties {
    ...
    testOnBorrow = true
    testWhileIdle = true
    testOnReturn = false
    validationQuery = "SELECT 1"
  }

值得尝试这些标志的各种组合。为了在您的环境中实现最佳性能，可能需要进行更改。