【anaconda】Collecting package metadata (current_repodata.json): failed / Solving environment: failed

心已赠人 2023-03-13 03:41 10阅读 0赞

### 文章目录 ###

*   *  一、问题
     *  二、解决步骤
     *   *  （1）步骤一
         *  （2）步骤二
         *  （3）步骤三
         *  （4）步骤四
         *  （5）另外的解决办法一：pip安装
         *  （6）另外的解决办法二
         *  （7）另外的解决办法三：更改镜像源
     *  三、参考

## 一、问题 ##

*  win10下，安装完conda之后打算安装pytoch时报错，解决步骤里面讲了我的多种尝试，应该可以解决此类大部分问题。

## 二、解决步骤 ##

### （1）步骤一 ###

刚安装完conda之后打算安装pytoch时：

*  命令行：

PS C:\Users\25387> conda install pytorch torchvision cudatoolkit=10.2 -c pytorch

*  报错

Collecting package metadata (current_repodata.json): failed
    
    CondaHTTPError: HTTP 000 CONNECTION FAILED for url <https://conda.anaconda.org/pytorch/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.
    'https://conda.anaconda.org/pytorch/win-64'

### （2）步骤二 ###

参考[Collecting package metadata (current\_repodata.json): failed][Collecting package metadata _current_repodata.json_ failed]之后按以下操作将文件粘贴过去：

当在windows下面的Anaconda的命令行中运行 conda时，如果出现Collecting package metadata (current_repodata.json): failed
    的错误提示，可以按照下面的方式来解决掉：把路径“Anaconda3/Library/bin ”下面的文件复制到路径“Anaconda3/DLLs”下:
    libcrypto-1_1-x64.dll
    libssl-1_1-x64.dll

*  再次运行命令行：

PS C:\Users\25387> conda install pytorch torchvision cudatoolkit=10.2 -c pytorch

*  报错

Collecting package metadata (current_repodata.json): done
    Solving environment: failed with initial frozen solve. Retrying with flexible solve.
    Collecting package metadata (repodata.json): done
    Solving environment: failed with initial frozen solve. Retrying with flexible solve.
    
    PackagesNotFoundError: The following packages are not available from current channels:
    
      - cudatoolkit=10.2
    
    Current channels:
    
      - https://conda.anaconda.org/pytorch/win-64
      - https://conda.anaconda.org/pytorch/noarch
      - https://mirrors.ustc.edu.cn/anaconda/pkgs/free/win-64
      - https://mirrors.ustc.edu.cn/anaconda/pkgs/free/noarch
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/win-64
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/noarch
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/win-64
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/noarch
    
    To search for alternate channels that may provide the conda package you're
    looking for, navigate to
    
        https://anaconda.org
    
    and use the search bar at the top of the page.

### （3）步骤三 ###

根据博客[conda安装环境报错：Solving environment: failed with initial frozen solve.][conda_Solving environment_ failed with initial frozen solve.]的步骤：

*  查一下conda版本：conda -V
 *  更新conda到最新版本：conda update -n base conda
 *  查一下conda版本：conda -V
 *  第二次更新conda到最新版本：conda update -n base conda
 *  多等一会儿
 *  然后执行：conda update --all
 *  再运行之前的程序，如果可以，问题解决。

### （4）步骤四 ###

*  如果还没有解决，进行以下步骤：
 *  有可能是在安装anaconda时错误，建议重装一遍anaconda，勾选自动添加环境就变量的选项。
 *  运行命令行，报以下错误，也有可能是在安装cuda和cudnn时，出现的错误，我在安装cudnn时，直接将配置文件复制到了cuda中，覆盖了其中的两个文件，后来重新安装了cuda，问题的到了解决。

PS C:\Users\25387> conda install pytorch torchvision cudatoolkit=10.2 -c pytorch
    
    Collecting package metadata (current_repodata.json): done
    Solving environment: failed with initial frozen solve. Retrying with flexible solve.
    Collecting package metadata (repodata.json): done
    Solving environment: failed with initial frozen solve. Retrying with flexible solve.
    
    PackagesNotFoundError: The following packages are not available from current channels:
    
      - cudatoolkit=10.2
    
    Current channels:
    
      - https://conda.anaconda.org/pytorch/win-64
      - https://conda.anaconda.org/pytorch/noarch
      - https://mirrors.ustc.edu.cn/anaconda/pkgs/free/win-64
      - https://mirrors.ustc.edu.cn/anaconda/pkgs/free/noarch
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/win-64
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/noarch
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/win-64
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/noarch
    
    To search for alternate channels that may provide the conda package you're
    looking for, navigate to
    
        https://anaconda.org
    
    and use the search bar at the top of the page.

*  对cuda进行环境变量设置参考博客：[Win10上安装CUDA和CUDNN][Win10_CUDA_CUDNN]
 *  环境变量配置好如下：  
    ![在这里插入图片描述][20200511110527506.png]

### （5）另外的解决办法一：pip安装 ###

*  不得已的办法：使用pip安装

pip install torch===1.5.0 torchvision===0.6.0 -f https://download.pytorch.org/whl/torch_stable.html

### （6）另外的解决办法二 ###

*  解决方法链接： [Anaconda使用conda连接网络出现错误][Anaconda_conda]
 *  链接：[解决办法][Link 1]
 *  将用户目录下的：.condarc改为如下所示，改为如下：

channels:
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/pytorch/
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/main/
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
      - defaults
      
    proxy_servers: 
        http: socks5://127.0.0.1:1080
    
    ssl_verify: False
    show_channel_urls: True
    allow_other_channels: True

### （7）另外的解决办法三：更改镜像源 ###

*  问题：

An HTTP error occurred when trying to retrieve this URL.

*  解决办法：
 *  如果给 Anaconda 配置了环境变量，可以直接在 cmd 窗口中执行；如果没有配置环境变量，则在 Anaconda Prompt 中执行，如果没有配置环境变量，在Anaconda Prompt 中执行如下命令，为 Anaconda 配置清华大学镜像源

conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/msys2/
    conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
    conda config --add channels https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
    conda config --set show_channel_urls yes

*  或者将用户目录下的：.condarc改为如下所示，更改镜像源

channels:
      - conda-forge
      - https://mirrors.ustc.edu.cn/anaconda/pkgs/free/
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/cloud/conda-forge/
      - https://mirrors.tuna.tsinghua.edu.cn/anaconda/pkgs/free/
    show_channel_urls: true

## 三、参考 ##

*  [Collecting package metadata (current\_repodata.json): failed][Collecting package metadata _current_repodata.json_ failed]
 *  [conda安装环境报错：Solving environment: failed with initial frozen solve.][conda_Solving environment_ failed with initial frozen solve.]
 *  [Anaconda使用conda连接网络出现错误][Anaconda_conda]
 *  [Anaconda 报错Multiple Errors Encountered 或 Anaconda An HTTP error occurred when trying to retrieve th][Anaconda _Multiple Errors Encountered _ Anaconda An HTTP error occurred when trying to retrieve th]
 *  [Win10上安装CUDA和CUDNN][Win10_CUDA_CUDNN] \- 最新版的cuda和cudnn安装教程，优先。

[Collecting package metadata _current_repodata.json_ failed]: https://blog.csdn.net/t20134297/article/details/104691192/
[conda_Solving environment_ failed with initial frozen solve.]: https://blog.csdn.net/weixin_41622348/article/details/100582862
[Win10_CUDA_CUDNN]: https://blog.csdn.net/james506/article/details/105901589/
[20200511110527506.png]: /images/20230312/a45c20d2747746b686320ebaccc1ddbc.png
[Anaconda_conda]: https://segmentfault.com/q/1010000008668178
[Link 1]: https://www.cnblogs.com/geoffreyone/p/12523040.html
[Anaconda _Multiple Errors Encountered _ Anaconda An HTTP error occurred when trying to retrieve th]: https://blog.csdn.net/wsjzzcbq/article/details/101052960