解决：An HTTP error occurred when trying to retrieve this URL. HTTP errors are often intermittent......

1 问题描述

在Anaconda下准备下载东西的时候，出现了这样的报错：

Collecting package metadata (current_repodata.json): failed

CondaHTTPError: HTTP 000 CONNECTION FAILED for url //conda.anaconda.org/r/win-64/current_repodata.json>
Elapsed: -

An HTTP error occurred when trying to retrieve this URL.
HTTP errors are often intermittent, and a simple retry will get you on your way.
ConnectTimeout(MaxRetryError("HTTPSConnectionPool(host='conda.anaconda.org', port=443): Max retries exceeded with url: /r/win-64/current_repodata.json (Caused by ConnectTimeoutError(, 'Connection to conda.anaconda.org timed out. (connect timeout=9.15)'))"))

2 问题解析

查找了网上很多资料，可能是源的问题，就是默认下载东西的链接是国外的镜像，存在一些问题，因此将源改成国内的镜像即可。

3 解决问题

① 在cmd下先后执行如下命令：

# 使用清华的镜像链接
conda config --add channels 'https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/'

# 
conda config --set show_channel_urls yes

② 如果①还是不行，到打开 C盘/用户/（你的用户名xx）/.condarc，我自己的如下图所示：


把以下这段代码复制到这个.condarc文件中：

channels:
  - defaults
show_channel_urls: true
channel_alias: https://mirrors.tuna.tsinghua.edu.cn/anaconda
default_channels:
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/r
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/pro
  - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/msys2
custom_channels:
  conda-forge: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  msys2: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  bioconda: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  menpo: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  pytorch: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud
  simpleitk: https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud

保存再试一试即可。

4 参考资料

An HTTP error occurred when trying to retrieve this URL.HTTP errors are often intermittent, and a simple retry will get you on your way.