Long Message: 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. Details: Type: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException SQL State: 08S01 错误2: An error occurred while establish...
com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure 1. 2. 3. 之后通过查看cat /var/log/mysql/error.log错误日志发现早上6点54分的时候,MySQL Server 8.0.32被迫开始关闭,接着就那几个线程就被关闭,Server 于56分完成关闭。 紧接着mysqld 8.0.33开始启动(注意这个地方的版本号...
CommunicationsException, druid version 1.2.16, jdbcUrl : jdbc:mysql://localhost:3306/db?serverTimezone=UTC&useUnicode=true&characterEncoding=UTF-8&allowMultiQueries=true&rewriteBatchedStatements=true, testWhileIdle true, idle millis 17774, minIdle 1, poolingCount 5, timeBetweenEvictionRunsMillis 60000,...
mysql-connector-java-5.1.9-bin.jar。 这个问题困扰了一天,后来想想换换5.0的驱动看看怎么样,结果在网上找了个mysql-connector-java-5.1.14-bin.jar的驱动,结果OK了。 2. CommunicationsException: Communications link failure If you get a SQLException: Connection refused or Connection timed out or a MySQL ...
### Error querying database. Cause: org.springframework.jdbc.CannotGetJdbcConnectionException: Could not get JDBC Connection; nested exception is com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure Last packet sent to the server was 0 ms ago. ...
近期项目需要搭配mysql一起存储相关数据,但对mysql的版本有要求,于是在服务器搭建了mysql5.7,顺便记录一下搭建步骤和踩坑解决步骤。 目录 前言 一、清除旧安装包 二、安装YUM 三、使用yum命令即可完成安装 四、重新设置密码 五、创库 六、项目连接数据库 ...
在linux下,开发一个web应用,期间调用数据库时总是不成功,如果单独写一个类,并编译执行访问数据库,正常,但是用web应用来调这个类连接数据库,就会出现错误:com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.security.AccessControlExce...
I developed under windows a server in JAVA, and with mysql-connector it connect itself to a mysql server. I moved the server on the linux debian PC, installed mysql server, java & the connector, but i receve this error: *Attenzione errore SQL: Communications link failure due to underl...
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Driver class MySQL JDBC Driver 3.1 Opening connection ... Connection jdbc:mysql://139.78.89.38:3306/?user=***&password=***&useServerPrepStmts=false The connection to the target database could not be established (error: 0). Communications link failure due to underlying exception: ...