MSYS2无法下载包：连接mirror.msys2.org镜像服务器失败求助

错误现象 #

执行pacman -Syu时出现如下错误：

$ pacman -Syu
:: Synchronizing package databases...
 clangarm64.db failed to download
 mingw32.db failed to download
 mingw64.db failed to download
 ucrt64.db failed to download
 clang32.db failed to download
error: failed retrieving file 'ucrt64.db' from mirror.msys2.org : Failed to connect to mirror.msys2.org port 443 after 30 ms: Couldn't connect to server
error: failed retrieving file 'clang32.db' from mirror.msys2.org : Failed to connect to mirror.msys2.org port 443 after 29 ms: Couldn't connect to server
error: failed retrieving file 'clangarm64.db' from mirror.msys2.org : Failed to connect to mirror.msys2.org port 443 after 36 ms: Couldn't connect to server
warning: too many errors from mirror.msys2.org, skipping for the remainder of this transaction
error: failed retrieving file 'mingw32.db' from mirror.msys2.org : Failed to connect to mirror.msys2.org port 443 after 36 ms: Couldn't connect to server

解决方案 #

1. 切换国内镜像源 #

编辑/etc/pacman.d/目录下的mirrorlist.mingw32、mirrorlist.mingw64、mirrorlist.ucrt64、mirrorlist.clang32、mirrorlist.clang64、mirrorlist.clangarm64文件，在文件开头添加对应国内镜像地址：

# 对应mirrorlist.mingw32
Server = https://mirrors.tuna.tsinghua.edu.cn/msys2/mingw/i686/
# 对应mirrorlist.mingw64
Server = https://mirrors.tuna.tsinghua.edu.cn/msys2/mingw/x86_64/
# 对应mirrorlist.ucrt64
Server = https://mirrors.tuna.tsinghua.edu.cn/msys2/mingw/ucrt64/
# 对应mirrorlist.clang32
Server = https://mirrors.tuna.tsinghua.edu.cn/msys2/mingw/clang32/
# 对应mirrorlist.clang64
Server = https://mirrors.tuna.tsinghua.edu.cn/msys2/mingw/clang64/
# 对应mirrorlist.clangarm64
Server = https://mirrors.tuna.tsinghua.edu.cn/msys2/mingw/clangarm64/

另外编辑/etc/pacman.d/mirrorlist.msys，添加：

Server = https://mirrors.tuna.tsinghua.edu.cn/msys2/msys/$arch/

2. 排查网络限制 #

• 执行ping mirror.msys2.org，若无法ping通，说明网络存在防火墙拦截、DNS污染或代理配置问题
• 若使用代理，在MSYS2终端手动配置代理环境变量：

  export http_proxy=http://你的代理地址:端口
  export https_proxy=http://你的代理地址:端口
  

3. 重置DNS配置 #

在MSYS2终端执行以下命令，切换公共DNS：

echo "nameserver 8.8.8.8" > /etc/resolv.conf

4. 手动同步数据库 #

如果上述方法无效，可直接下载对应数据库文件放到/var/lib/pacman/sync/目录，再执行pacman -Syu

内容的提问来源于stack exchange，提问作者Lynn