Could not connect to https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/osx-64 An unexpected error has occurred

[WarSmoke]

Current conda install:

           platform : osx-64
      conda version : 4.2.12
   conda is private : False
  conda-env version : 4.2.12
conda-build version : not installed
     python version : 2.7.12.final.0
   requests version : 2.11.1
   root environment : /Users/kcui/miniconda2  (writable)
default environment : /Users/kcui/miniconda2
   envs directories : /Users/kcui/miniconda2/envs
      package cache : /Users/kcui/miniconda2/pkgs
       channel URLs : https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/osx-64
                      https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/noarch
                      https://repo.continuum.io/pkgs/free/osx-64
                      https://repo.continuum.io/pkgs/free/noarch
                      https://repo.continuum.io/pkgs/pro/osx-64
                      https://repo.continuum.io/pkgs/pro/noarch
        config file : /Users/kcui/.condarc
       offline mode : False

$ /Users/kcui/miniconda2/bin/conda create -n py34 python=3.4

Traceback (most recent call last):
  File "/Users/kcui/miniconda2/lib/python2.7/site-packages/conda/exceptions.py", line 479, in conda_exception_handler
    return_value = func(*args, **kwargs)
  File "/Users/kcui/miniconda2/lib/python2.7/site-packages/conda/cli/main.py", line 145, in _main
    exit_code = args.func(args, p)
  File "/Users/kcui/miniconda2/lib/python2.7/site-packages/conda/cli/main_create.py", line 68, in execute
    install(args, parser, 'create')
  File "/Users/kcui/miniconda2/lib/python2.7/site-packages/conda/cli/install.py", line 238, in install
    prefix=prefix)
  File "/Users/kcui/miniconda2/lib/python2.7/site-packages/conda/api.py", line 24, in get_index
    index = fetch_index(channel_urls, use_cache=use_cache, unknown=unknown)
  File "/Users/kcui/miniconda2/lib/python2.7/site-packages/conda/fetch.py", line 305, in fetch_index
    for url in urls]
  File "/Users/kcui/miniconda2/lib/python2.7/site-packages/conda/fetch.py", line 74, in func
    res = f(*args, **kwargs)
  File "/Users/kcui/miniconda2/lib/python2.7/site-packages/conda/fetch.py", line 234, in fetch_repodata
    raise CondaRuntimeError(msg)
CondaRuntimeError: Runtime error: Connection error: HTTPSConnectionPool(host='mirrors.tuna.tsinghua.edu.cn', port=443): Max retries exceeded with url: /anaconda/pkgs/free/osx-64/repodata.json (Caused by ConnectTimeoutError(<requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x103ee5a90>, u'Connection to corp.com timed out. (connect timeout=3.05)')): https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/osx-64

I want to install box2d, but I cant fix this connection error.
when I $conda install numpy , this same error occurs.
whien I vim .condarc and change to https://repo.continuum.io/pkgs/free/osx-64, this same error occurs.

here is .condarc
1 channels:
2 - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
3 # - https://repo.continuum.io/pkgs/free/osx-64
4 - defaults
5 show_channel_urls: true
6
7
8 proxy_servers:
9 http: http://user:pass@corp.com:8080
10 https: https://user:pass@corp.com:8080

[kalefranz]

Intermittent HTTP error, likely due to flakey internet connection. Retrying will probably resolve the issue. Conda 4.3 has longer default timeouts that are also configurable.

[github-actions]

Hi there, thank you for your contribution to Conda!

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