org.springframework.transaction.CannotCreateTransactionException: Could not open JDBC Connection for transaction; nested exception is java.sql.SQLException: Cannot create PoolableConnectionFactory (Could not create connection to database server. Atte…

裸最短路.. ------------------------------------------------------------------------------------ #include<cstdio> #include<cstring> #include<algorithm> #include<iostream> #include<queue>   #define rep( i , n ) for( int i = 0 ; i &…

启动spark的时候发现,主节点(master)上的Master进程还在,子节点(Worker)上的Worker进程自动关闭. 在子节点上查询log发现: ERROR Worker: All masters are unresponsive! Giving up 发现子节点连接不上master节点,经检测,master上防火墙没有关闭..…

2015: [Usaco2010 Feb]Chocolate Giving Time Limit: 10 Sec  Memory Limit: 162 MBSubmit: 269  Solved: 183[Submit][Status] Description Farmer John有B头奶牛(1<=B<=25000),有N(2*B<=N<=50000)个农场,编号1-N,有M(N-1<=M<=100000)条双向边,第i条边连接农场R_i和S_i(1<=R_i&…

Unable to connect to MKS;Too many scoket connect attempts;giving up(无法连接到MKS;太多scoket连接尝试;放弃) 第一次学习虚拟机或者久不用虚拟机的时候偶尔会出现下面这个问题 出现这个问题是因为没启动服务 在弹出菜单中点击“运行”菜单项. 在服务这找到VMware Workstaction Server 启动类型改为[自动] 点击[确定] 再点击“启动”按钮,最后点击确定按钮,启动该项服务即可. 像下图那种状态 从新打开,…

I know what you should do and here's my advice. How many times have you heard that (and groaned)? groan:呻吟,抱怨 Advice giving, especially unsolicited, is tricky. Being on the receiving end can be annoying and make us defensive. But giving advice can be…

Guide to Giving Effective Feedback 前文卓越管理的秘密(Behind Closed Doors)最后一部分提到了总结的13条卓越管理的实践技巧并列出了所有实践技巧名称的索引,这篇文章主要写卓越管理的实践技巧的第(4)条:如何才能给予有效的反馈: 管理者需要知道下属在做些什么,每个员工更需要知道他们自己在做什么.更进一步的说,每个人除了知道自己在做什么之外,还需要知道如何改变才能更好的工作!下面会给出具体做法让每个人都能给出积极的反馈可响应. 下图主要提供了处理反…

项目是基于springboot框架,昨天从git上pull代码之后也没有具体看更改的地方,结果运行的时候就报错了. java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up. at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException…

洛谷 P2984 [USACO10FEB]给巧克力Chocolate Giving 洛谷传送门 JDOJ 2680: USACO 2010 Feb Silver 2.Chocolate Giving JDOJ传送门 Description Farmer John is distributing chocolates at the barn for Valentine's day, and B (1 <= B <= 25,000) of his bulls have a special cow…

[08001] Could not create connection to database server. Attempted reconnect 3 times. Giving up. 点击这里 切换驱动 IDEA2019的database插件无法链接mysql的解决办法(08001错误)…