参考:
https://www.cnblogs.com/yinzhengjie/articles/11064239.html
yarn.scheduler.fair.allow-undeclared-pools false #不容许用户自己创建队列
yarn.scheduler.minimum-allocation-mb 512
yarn调优
原文：https://www.cnblogs.com/hongfeng2019/p/12109719.html
