出现异常”The last packet sent successfully to the server was 0 milliseconds ago.“的大部分原因是由于数据库回收了连接，而系统的缓冲池不知道，继续使用被回收的连接所致的。

以mysql为例：

第一种解决办法，就是将mysql回收空闲连接的时间变长，mysql默认回收时间是8小时，可以在mysql目录下的my.ini中增加下面配置，将时间改为1天。

单位是秒，最大好像是24天：

[mysqld]

wait_timeout=86400

第二种解决办法，可以通过配置，让缓冲池去测试连接是否被回收，如果被回收，则不继续使用，以dbcp为例：

#SQL查询,用来验证从连接池取出的连接           dbcp.validationQuery=SELECT 1           #指明连接是否被空闲连接回收器(如果有)进行检验，如果检测失败，则连接将被从池中去除           dbcp.testWhileIdle=true           #在空闲连接回收器线程运行期间休眠的时间值,以毫秒为单位，一般比minEvictableIdleTimeMillis小           dbcp.timeBetweenEvictionRunsMillis=300000           #在每次空闲连接回收器线程(如果有)运行时检查的连接数量，最好和maxActive一致          dbcp.numTestsPerEvictionRun=50           #连接池中连接，在时间段内一直空闲，被逐出连接池的时间(1000*60*60)，以毫秒为单位           dbcp.minEvictableIdleTimeMillis=3600000

The last packet sent successfully to the server was 0 milliseconds ago的更多相关文章

  1. The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

    今天项目中报了如下错误 The last packet sent successfully to the server was 0 milliseconds ago. The driver has n ...

  2. The last packet sent successfully to the server was 0 milliseconds ago.[nutch---mysql ]

    今天在使用JDBC操作mysql时遇到下面的异常信息: 引用 The last packet sent successfully to the server was 0 milliseconds ag ...

  3. The last packet successfully received from the server was 20,519 milliseconds ago. The last packet sent successfully to the server was 0 milliseconds ago.

    本地升级了下MySQL的版本,从5.6升为5.7,数据文件直接拷贝的,项目查询数据库报错: Could not retrieve transation read-only status server ...

  4. Communications link failure；；The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

    Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure::The ...

  5. docker 踩坑日记The last packet sent successfully to the server was 0 milliseconds ago.

    The last packet sent successfully to the server was 0 milliseconds ago. 今日遇到了这个坑,看似平白无奇. 首先,我定位到是数据库 ...

  6. 解决异常：“The last packet sent successfully to the server was 0 milliseconds ago. ”的办法

    出现异常"The last packet sent successfully to the server was 0 milliseconds ago."的大部分原因是由于数据库回 ...

  7. The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. （关于jdbc）

    The last packet sent successfully to the server was milliseconds ago. The driver has not received an ...

  8. 【异常】The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

    1 详细异常信息 The last packet sent successfully to the server was milliseconds ago. The driver has not re ...

  9. 【错误】：Could not open JDBC Connection for transaction; nested exception is: Communications link failure;The last packet sent successfully to the server was 1 milliseconds ago

    # #错误日志 2016-11-10 16:19:20,834 ERROR [org.quartz.core.JobRunShell] - Job DEFAULT.jobtask threw an u ...

随机推荐

  1. python中访问限制

    在Class内部,可以有属性和方法,而外部代码可以通过直接调用实例变量的方法来操作数据,这样,就隐藏了内部的复杂逻辑. 但是,从前面Student类的定义来看,外部代码还是可以自由地修改一个实例的na ...

  2. Mysql 慢查询日志配置

    查询日志 1.主配置文件下对添加参数.重启生效. vim /etc/my.cnf 注:主要用于查看开发程序执行时间. 注:log_slow_queries = /tmp/mysql.slow    # ...

  3. PHP练习题三

    1.用PHP打印出前一天的时间格式是2006-5-10 22:21:21. echo date(‘Y-m-d H:i:s’, strtotime(‘-1 days’)); 2.不使用第三个变量交换两个 ...

  4. Spring中Value注解的使用

    Spring中Value注解的使用 分类: Spring2014-08-16 17:28 2985人阅读 评论(0) 收藏 举报 有的时候我们定义了Properties文件,并且使用Spring的Pr ...

  5. UVA 10288 Coupons （概率）

    题意:有n种纸片无限张,随机抽取,问平均情况下抽多少张可以保证抽中所有类型的纸片 题解:假设自己手上有k张,抽中已经抽过的概率为 s=k/n:那抽中下一张没被抽过的纸片概率为 (再抽一张中,两张中,三 ...

  6. 前端开发日记之jQuery

    优先引入CDN上的jQuery,如果失效再引入本地的jQuery! <script src="http://libs.baidu.com/jquery/1.11.1/jquery.js ...

  7. Android -- UI布局管理，相对布局，线性布局，表格布局，绝对布局，帧布局

    1. 相对布局 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmln ...

  8. Pow,求x的y次幂

    算法分析:很显然用递归.但是直接用递归会造成栈溢出,时间复杂度是o(n).所以要用分治思想,时间复杂度是o(logN). public class Power { //栈溢出,时间复杂度是o(n) p ...

  9. Red Hat OpenStack 10的新特性

    这是Red Hat有史以来最好的版本,同时也是第一个长生命周期版本(最长五年支持),这篇文章会介绍为什么这是你私有云最好的礼物. 由于要使用命令行,以前安装OpenStack是很繁重的工作.这个版本提 ...

  10. 分享：自定义JAVA注解

    元注解 元注解指用来定义注解的注解,例如:@Retention @Target Inherited @Documented等等.最为重要和经常使用的是@Retention @Target. @Rete ...