一.报错的问题: 测试环境在做压力测试的时候爆出错误 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure INFO | jvm 1 | 2013/10/24 14:22:28 | INFO | jvm 1 | 2013/10/24 14:22:28 | The last packet successfully received from the server was 26,071

在连接mysql jdbc时候,抛出了 com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Communication link failure,  message from server: "Can't get hostname for your address" 的错误,无论是使用jdbc:mysql://127.0.0.1:3306还是jdbc:mysql://localhost:3306都出

出现这种情况: 临时解决方法是: 登录mysql: 执行: set global max_allowed_packet=1000000000;       set global net_buffer_length=1000000;       FLUSH PRIVILEGES 终极解决就是在配置文件中: 将max_allowed_packet = 1000000000;   #因为有的Mysql 不支持1024M 这种写法,具体版本情况,暂时还不明确..

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(com.mysql.jdbc.exceptions.jdbc4.Communication***ception:Communications link failure Last packet 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,断开之后的首次请求会抛出这个异常.那么既然是连接超时的问题,就要去MySQL中探究一下连接时间是怎么控制的.打开MySQ

一.背景 最近在家里捣鼓一个公司自己搭建的demo的时候,发现程序一启动就会出现CommunicationsException: Communications link failure错误,经过一番排查最后发现是数据库url写错造成的,这个过程中也对出现这个错误的解决思路有了一些自己的理解,现和大家分享.该错误的具体信息如下: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

09:00:30.307 [http-8080-6] ERROR org.hibernate.transaction.JDBCTransaction -JDBC begin failed com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 56,237,340 mi

-- 查询mysql 数据库链接空闲时间持有最大空闲时间,单位为秒 SHOW VARIABLES WHERE VAriable_name = 'interactive_timeout'; -- 会出现wait_timeout与该参数意思相近,修改时,一起修改 SHOW VARIABLES WHERE VAriable_name = '%timeout'; -- 解决问题 com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Commun

MySQL默认一个连接空闲8小时候就会自动断开,而这时程序以为连接还能使用,然后在使用的时候就会出现Communications link failure异常. 这时需要进行两步设置,有时候只设置MySQL就可以了. 一.在MySQL的配置文件(linux配置文件是my.cnf,windows配置文件为my.ini)中添加以下两行(默认值为28800,下面的值代表一年.听说windows下的MySQL不支持一年,可以适当减少尝试) wait_timeout=31536000 interactiv

使用Connector/J连接MySQL数据库,程序运行较长时间后就会报以下错误: Communications link failure,The last packet successfully received from the server was *** millisecond ago.The last packet successfully sent to the server was ***  millisecond ago. 其中错误还会提示你修改wait_timeout或是使用C

最近在用一个MySQL的Java连接池的过程中,连接一晚上不释放,第二天就会造成超时的错误,查了一下原因,原来是因为MySQL默认的空闲等待时间是8个小时,一旦空闲超过8个小时,就会抛出异常.异常文本如下: com.mysql.jdbc.CommunicationsException MESSAGE: Communications link failure due to underlying exception: ** BEGIN NESTED EXCEPTION ** java.net.Soc

使用Connector/J连接MySQL数据库,程序运行较长时间后就会报以下错误: Communications link failure,The last packet successfully received from the server was *** millisecond ago.The last packet successfully sent to the server was *** millisecond ago. 其中错误还会提示你修改wait_timeout或是使用Co

# #错误日志 2016-11-10 16:19:20,834 ERROR [org.quartz.core.JobRunShell] - Job DEFAULT.jobtask threw an unhandled Exception: org.springframework.scheduling.quartz.JobMethodInvocationFailedException: Invocation of method 'execute' on target class [class co

四种会发生Radio Link Failure的场景 -  DL Physical Layer Failure (PDCCH BLER > 10%) -  Random Access Problems (in Connected State) -  Failure after RLC retransmissions(specific PDU) -  Handover Failure - T304 expiry (Acquisition or random access) DL Physical

不多说,直接上干货! 问题详情 [hadoop@bigdatamaster oozie--cdh5.5.4]$ bin/ooziedb.sh create -sqlfile oozie.sql -run DB Connection [hadoop@bigdatamaster oozie--cdh5.5.4]$ bin/ooziedb.sh create -sqlfile oozie.sql -run DB Connection setting CATALINA_OPTS="$CATALINA_O

异常描述 这个异常通常有如下信息: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet successfully received from the server was 59,977 milliseconds ago. The last packet sent successfully to the server was 1 millisecon

前端时间到客户那去进行项目的上线测试,将项目部署好之后,运行都是正常的,可是每到了第二天早上访问的时候,就会报一个Could not open Hibernate session for transaction 异常,Caused by: com.mysql.jdbc.CommunicationsException: Communications link failure due to underlying exception,当时很摸不着头脑,后来就开始从数据库连接的源头开始找,本次项目中用的

一,异常现象 com.bill99.inf.ibatis.DBException: queryForList error::sqlId=orgOrderAssetsMapping.queryModelOrgOrderAssetsMapping param:com.bill99.boss.domain.org.model.OrderAssetsMapping@51ab0a47 at com.bill99.inf.ibatis.SqlMapDao.queryForList(SqlMapDao.jav

在使用JDBC连接mysql时可能会遇到以下错误: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: 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 解决方法: 将 Str

很长的报错,截取   ERROR c.a.d.p.DruidDataSource - discard connection   com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure       The last packet successfully received from the server was 44,866 milliseconds ago. The last pac

1.使用sqoop技术将mysql的数据导入到Hive出现的错误如下所示: 第一次使用命令如下所示: [hadoop@slaver1 sqoop--cdh5.3.6]$ bin/sqoop import --connect jdbc:mysql://localhost:3306/test --username root --password 123456 --table tb_user --hive-import --m 1 Warning: /home/hadoop/soft/sqoop--c