git拉取代码报错：

1.fatal: unable to access 'https://github.com...HTTP/2 stream 1 was not closed cleanly before end of the underlying stream

2. Failed to connect to github.com port 443 after 21088 ms: Timed out

1.拉取spring源码

 git clone https://github.com/spring-projects/spring-framework.gi

2.拉取spring源码报错：

$ git clone https://github.com/spring-projects/spring-framework.git
Cloning into 'spring-framework'...
fatal: unable to access 'https://github.com/spring-projects/spring-framework.git/': HTTP/2 stream 1 was not closed cleanly before end of the underlying stream
 3.解决办法：

打开cmd，输入：ping github.com

2.1方法一：将上面的ip配置到本地hosts文件中，

把20.205.243.166 github.com添加到C:\Windows\System32\drivers\etc里的hosts文件的最后一行，然后保存就行 

 2.2方法二：把命令行里的https/http改为git重新执行

 例如： git clone git://github.com/spring-projects/spring-framework.gi

我是用的方法一：执行后结果如下红框，依然报错：fatal: unable to access 'https://github.com/spring-projects/spring-framework.git/': Failed to connect to github.com port 443 after 21088 ms: Timed out

但是不用慌，解决办法：

 在cmd下执行 ipconfig/flushdns，清理DNS缓存

3.再次执行，执行成功！