Caused by: com.mysql.jdbc.exceptions.MySQLTimeoutException: Statement cancelled due to timeout or client request at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2303) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2696) at com.mys…

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> <property name="driverClassName" value="${jdbc.driverClassName}" /> <property name="url&quo…

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…

1.错误原因 [ERROR:]2015-04-18 13:20:31,883 [异常拦截] com.skycloud.oa.exception.ExceptionHandler org.hibernate.exception.SQLGrammarException: error executing work at org.hibernate.exception.internal.SQLExceptionTypeDelegate.convert(SQLExceptionTypeDelegate.j…

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…

MySQL完整性约束破坏异常:com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException 在单向多对一关联关系中,如果A 持有 B 的引用(即A是多端,B是一端),也就是A 的外键列指向了B 的主键.那么此时如果先删除B, 再删除A(即先删除一端,再删除A端).那么就会抛出上述异常. Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConst…

### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Duplicate entry 'qingmu' for key 'PRIMARY' ### The error may involve com.qingmu2.core.dao.seller.SellerDao.insertSelective-Inline ### The…

1 详细异常 2019-10-11 10:33:55,865 INFO main:com.cloudera.server.cmf.Main: ================================================================================ 2019-10-11 10:33:55,884 INFO main:com.cloudera.server.cmf.Main: Starting SCM Server. JVM Args: [-D…

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…

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…