Disclaimer: This article is a blogger original article, shall not be reproduced without the bloggers allowed. https://blog.csdn.net/GoSaint/article/details/90108506
I wrote an article before https://blog.csdn.net/GoSaint/article/details/88057652 describes the reasons not start port 50070. This is based on hadoop2.x version. After I built hadoop3.x, jps are normal. Found it impossible to access the 50070. In fact, after hadoop3.x, the address of the page UI has changed: HTTP: // localhost: 9870 /