Log4J 和 Log4J2
Log4j 目录
log4j 代码例子
centos7（linux）定时计划任务-crontab、crond
yarn-session.sh命令参数
flink1.12.x：session cluster模式-测试wordcount
flink1.12.x：session cluster模式部署
Caused by: java.net.ConnectException: 拒绝连接
flink1.12.x：Could not complete the operation. Number of retries has been exhausted.
yarn停止任务