com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet success [问题点数:40分,结帖人wxhwdmxl]

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求救:tomcat 报错 提示mysql 连接已经关闭,com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure,这个问题已经缠绕我多天了
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstr
MySQL第二天早上第一次连接超时报错,解决方法com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
http://zeusami.iteye.<em>com</em>/blog/1112827 MySQL第二天早上第一次连接超时报错,解决方法<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure  <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.Co
mysqlcom.mysql.jdbc.exceptions.jdbc4.CommunicationsException
早上看日志发现连接超时报错: Caused by: <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: <em>The</em> last <em>packet</em> <em>success</em>fully received from the server was<em>4</em>8<em>4</em>77 seconds ago.<em>The</em> last <em>packet</em> sent <em>success</em>fully to the s
.jdbc4.CommunicationsException: Communications link failure
<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure <em>The</em> last packe
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link fa
org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure(MySQL连接问题服务未启动)
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com.mysql.jdbc.exceptions.jdbc4.CommunicationsException异常解决
项目开发,Tomcat+Mysql,经常在早上刚到公司,第一次访问项目的时候会报以下异常: <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em> 这是因为Mysql5的连接等待时间(wait_timeout)默认8小时。 我们可以通过以下方法查看你的<em>mysql</em> 的默认连接等待时间是多少: show global variables...
Mysql异常:com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: "Too many connections" 原因:因为你的<em>mysql</em>安装目录下的my.ini中设定的并发连接数
异常:com.mysql.jdbc.exceptions.jdbc4.communicatio
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两种解决异常:“The last packet sent successfully to the server was 0 milliseconds ago. ”的办法
出现异常”<em>The</em> last <em>packet</em> sent <em>success</em>fully 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<em>mysql</em>为例:            第一种解决办法,就是将<em>mysql</em>回收空闲连接的时间变长,<em>mysql</em>默认回收时间是8小时,可
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java部署的web项目连接mysqlcom.mysql.jdbc.exceptions.jdbc4.CommunicationsException异常
发布的时候没出现严重的异常: 信息: validateJarFile(E:\MyWork\.metadata\.me_tcat\webapps\Gcimes\WEB-INF\lib\javax.se
mysql 异常com.mysql.jdbc.CommunicationsException
<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>CommunicationsException</em> Communications link failure due to underlying exception:
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException问题
在运行程序的时候报出一个异常↓↓↓ <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: “Too many connections”<em>com</em>.<em>mysql</em>.<em>jdbc</em>.exc
mysql报错:com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully receiv
<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: <em>The</em> last <em>packet</em> <em>success</em>fully received from the server was 5<em>4</em>,337,996 milliseconds ago. <em>The</em> last <em>packet</em> sent <em>success</em>fully to the server was 5<em>4</em>,
数据库连接池与com.mysql.jdbc.exceptions.jdbc4.CommunicationsException异常
数据库连接池与<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>异常解决
com.mysql.cj.jdbc.exceptions.SQLError.createSQLException
<em>com</em>.<em>mysql</em>.cj.<em>jdbc</em>.<em>exceptions</em>.SQLError.createSQLException Loading class `<em>com</em>.<em>mysql</em>.<em>jdbc</em>.Driver'. This is deprecated. <em>The</em> new driver class is `<em>com</em>.<em>mysql</em>.cj.<em>jdbc</em>.Driver'. <em>The</em> driver is automatically reg...
报错com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:Communications link failure的解决(不是百度的哦)
(好久没发动态了0.0)遇到这个问题,首先我百度了一下,都是抄袭别人的解答,这些人真没意思,我都尝试了,什么把 数据库配置my.ini文件的interactive_timeout 和 wait_timeout 设置大一些,什么的都不行(当然你可以尝试一下),最后我想是不是防火墙拦截了,于是我设置防火墙取消拦截<em>mysql</em>的访问,居然好了,太开心了,哈哈哈!后面就点下一步,就好了,然后再用java连数...
数据库连接超时
http://zeusami.iteye.<em>com</em>/blog/1112827 MySQL第二天早上第一次连接超时报错,解决方法<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.jd...
关于 Communications link failure 的解决
这个项目是基于SSH 框架,数据库是MYSQL ,服务器是TOMCAT,部署完成后,经过一段时间(估计约8小时,但不确定),当再次访问该项目,即:当与数据库再次连接时,就报下面这个异常,请各位帮忙分析
Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException
Caused by: <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: <em>The</em> last <em>packet</em> <em>success</em>fully received from the server was 52,705,191 milliseconds ago. <em>The</em> last <em>packet</em> sent <em>success</em>fully to the serv
项目登录时报错:com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.MySQLNonTransientConnectionException: Could not create connection to
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 错误怎么解决
我用的一个简单的测试MySql数据库JDBC连接是否成功,程序没有错误,但打开网页时会出现:<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.CommunicationsExceptio
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
最近在空闲时间学习的时候,往服务器上部署项目遇到无法连接数据库,启动报错的问题,最后排查下来是一个简单的配置造成的,特此记录。 服务器:centos 7 <em>mysql</em>:5.7.23 tomcat:8.5.3<em>4</em> jdk:1.8.0_181 说明:由于是自己练手的项目,<em>mysql</em>也是安装在同一台服务器上的; 问题描述 我的项目就是一个普通的maven javaweb项目,丢到服务器上后,启动tomcat...
mysql重连,连接丢失:The last packet successfully received from the server
1.1 错误信息: Caused by: <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: <em>The</em> last <em>packet</em> <em>success</em>fully received from the server was 20,820,001 milliseconds ago. <em>The</em> last <em>packet</em> sent <em>success</em>ful...
com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not
试了网上好多种方法,就是还没解决 还请各位大佬能够帮忙看看 谢谢
Software caused connection abort: recv failed / Communications link failure / The last packet suc
错误: Software caused connection abort: recv failed    Communications link failure <em>The</em> last <em>packet</em> <em>success</em>fully received from the server was 20<em>4</em>,219 milliseconds ago.  <em>The</em> last <em>packet</em> sent <em>success</em>ful...
sqoop连接mysql出现com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
ERROR manager.CatalogQueryManager: Failed to list databases <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure <em>The</em> last <em>packet</em> sent <em>success</em>fully to the server was 0...
报错解决com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
当我用Hibernate连接MySql数据库并且简单的测试时,出现了 <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure 这样一个问题 谷歌一下,出现的大多数解决方案都是让我修改my.ini的配置,修改wait_timeout,然而这个方法对于我来说并没有任何的用处。 于是...
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
一大清早俩个大错误弄得我俩脸懵逼: 参考文档:https://blog.csdn.net/cynhafa/article/details/19676865
JDBC连接MySQL8.0异常:com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
错误原因:使用rSet.getstring();前一定要加上rSet.next(); 改正:在前面加上rSet.next();
解决com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
有时候<em>mysql</em>会遇到: <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: <em>The</em> last <em>packet</em> <em>success</em>fully received from the server was 126,<em>4</em>21,823 milliseconds ago. <em>The</em> last <em>packet</em> sent <em>success</em>fully to the...
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: 异常
请各位大神帮忙看看,谢谢! sql语句在数据库中可以正常执行,但是在eclipse中就会报这个错误: <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.MySQLSyntaxErrorE
sqoop连接数据库报错com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
报错信息 java.sql.SQLException: Access denied for user 'root'@'hd00' (using password: YES) at <em>com</em>.<em>mysql</em>.<em>jdbc</em>.SQLError.createSQLException(SQLError.java:1078) at <em>com</em>.<em>mysql</em>.<em>jdbc</em>.MysqlIO.checkErrorPacket(My...
Mysql异常com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:Communications
转自     http://wentao365.iteye.<em>com</em>/blog/212<em>4</em>869 org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is <em>com</em>.<em>mysql</em>.<em>jdbc</em>
jdbc Before start of result set at com.mysql.jdbc.SQLError.createSQLException(SQ
Before start of result set  at <em>com</em>.<em>mysql</em>.<em>jdbc</em>.SQLError.createSQLException(SQ 无论是第几次获取第几个数据库的返回结果,必须rs.next().
hikari数据库连接池问题
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mysql 连接出现The last packet sent successfully to the server was 0 milliseconds ago.问题解决
我在SpringBoot+SpringData JPA时,启动项目遇到这样的错误 经过很多的尝试之后,才发现在application.properties文件中 ##数据库用户名 spring.datasource.data-username=root ##数据库密码 spring.datasource.data-password=6<em>4</em>55 改为: ##数据库用户名 spring.data...
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我在尝试与<em>mysql</em>建立连接的时候抛出以下异常。 MySQL错误<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: 同时问题定位出错的地方在: conn=DriverManager.getConnection(url, user, password); 这句话中,原本的定义为: static final String url...
Mysql异常com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:Communications link failure
参考:https://wentao365.iteye.<em>com</em>/blog/212<em>4</em>869
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link解决办法
最近在网上找了项目将J2EE的教程,跟着视频做,做一步测一步,刚才项目还能好好的启动,下一秒就报错了,<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link,上网查了好多,花了半个多小时,最后竟然是mySql服务关了。打开服务就好了。
程序报错`com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure`
程序报错<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure 1. 报错 <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure <em>The</em> last <em>packet</em> succ...
Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
使用MySql8.0.1数据库连接不上,主要原因是因为使用5点几的驱动如(<em>mysql</em>-connector-java-5.1.37-bin.jar),所以需要改成使用8点几的驱动如(<em>mysql</em>-connector-java-8.0.12.jar) org.apache.ibatis.<em>exceptions</em>.PersistenceException:  ### Error querying datab...
java与mysql连接出现的问题
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Maven项目中:com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException
解决 这是因为本地的<em>mysql</em>安装的8.0,而项目所使用的驱动是5.1。 打开Maven项目目录下的pom.xml,找到<em>mysql</em>的驱动依赖 原来是5.1.26的版本,现在将其改为8.0.11 ...
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前一段时间在做一个发邮件的程序,程序是用定时器,每晚凌晨定时发邮件,邮件内容需要从数据库中获取,运行了一天就出问题了。问题信息如下<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: <em>The</em> last <em>packet</em> <em>success</em>fully received from the server was56588 milliseconds ago
诡异的mysql连接超时断开问题The last packet successfully ~~
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[JDBC] 解决com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
原代码import java.sql.*;public class ex { public static void main(String[] argv){ Connection con; try{ Class.forName("<em>com</em>.<em>mysql</em>.<em>jdbc</em>.Driver"); }catch(Exception e){}
mysql com.mysql.jdbc.exceptions.jdbc4.CommunicationsException
1、现象: 连接<em>mysql</em>时报错 <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em> 这个在长时间连接但是又不操作的情况下会报这个错误,虽然可以改<em>mysql</em>的配置文件来达到目的,但是 我们是开发不是DBA,所以尽量还是通过程序来控制 2、解决 在连接串中添加下面一串配置 &amp;amp;autoReconnect=true&amp;amp;fail...
难以置信的报错:已解决com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown database ‘test’
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异常解决:Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
Caused by: <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure Last <em>packet</em> sent to the server was 0 ms ago. at sun.reflect.GeneratedConstructorAccessor36.newInstan
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09:00:30.307 [http-8080-6] ERROR org.hibernate.transaction.JDBCTransaction -JDBC begin failed <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure <em>The</em> last <em>packet</em> ...
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HTTP Status 500 - org.hibernate.exception.JDBCConnectionException: <em>The</em> last <em>packet</em> <em>success</em>fully received from the server was 270,558,931 milliseconds ago. <em>The</em> last <em>packet</em> sent <em>success</em>fully to the serv
Java程序连接mysql数据库出现CommunicationsException: Communications link failure错误的问题
生产一直暴这个 百度了下说以下操作可以解决这个问题,但是也试了 没用求大神请教 wait_timeout=31536000 interactive_timeout=31536000 将过期时间修改为
jdbc 连接mysql 首次成功,之后连接就报错
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Mysql学习总结(62)——MySQL连接com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link问题
数据库出现如下连接问题 <em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: Communications link failure <em>The</em> last <em>packet</em> sent <em>success</em>fully to the server was 0 milliseconds ago. <em>The</em> driver has not received an...
mysql Communications link failure Last packet sent to the server was X ms ago
想必大家在用MySQL时都会遇到连接超时的问题,如下图所示: 就是这个异常(<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.Communication***ception:Communications link failure Last <em>packet</em> sent to the server was X ms ago),是由于MySQL服务在长时间不连接之后断开了,断开之后
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java链接Mysql异常:com.mysql.jdbc.exceptions.jdbc4.CommunicationsException:
1963ok<em>com</em>.<em>mysql</em>.<em>jdbc</em>.<em>exceptions</em>.<em>jdbc</em><em>4</em>.<em>CommunicationsException</em>: <em>The</em> driver was unable to create a connection due to an inability to establish the client portion of a socket. This is usually caused by
androidstudio为啥连不上mysql呀,老报如下错
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针对mysql8.0报错:com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create
折腾了好久,后来发现是版本问题,驱动和数据库不匹配导致。 原来用的是5.1.37的驱动。数据库是<em>mysql</em>5.7,可以连接成功。 就在我把数据库换成了8.0之后,所有的买点啥都报标题里的错误了。 换成了下边这个驱动就OK了。瞬间心情好了有没有!这个坑。实在是深啊! 有需要的朋友自行下载吧。我在<em>mysql</em>官网没找到????然后在maven里弄出来的。...
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java中访问mysql 出现 communications link failure
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The last packet successfully received from the server was 30,516,920 milliseconds ago.
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Mysql报com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure错误
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Cause: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
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