WinHttpSendRequest() failed: 12007

[ashari4]

I see intermittent problems downloading 7zip.

PS E:\Code\vcpkg> .\vcpkg.exe install --recurse cppzmq
....
 A suitable version of 7zip was not found (required v19.0.0).  Downloading
  portable 7zip v19.0.0...

  Downloading 7zip...

    https://www.7-zip.org/a/7z1900-x64.msi -> C:\__w\_temp\vcpkg-src\downloads\7z1900-x64.msi

  Error: Failed to download from mirror set:

  https://www.7-zip.org/a/7z1900-x64.msi: WinHttpSendRequest() failed: 12007

  https://www.7-zip.org/a/7z1900-x64.msi: WinHttpSendRequest() failed: 12007

  https://www.7-zip.org/a/7z1900-x64.msi: WinHttpSendRequest() failed: 12007

  https://www.7-zip.org/a/7z1900-x64.msi: WinHttpSendRequest() failed: 12007

Perhaps, some improvement can be made to the download logic similar to this PR: microsoft/vcpkg-tool#116.

12007 corresponds to ERROR_WINHTTP_NAME_NOT_RESOLVED: https://docs.microsoft.com/en-us/windows/win32/winhttp/error-messages

[Cheney-W]

What's the version of your vcpkg? Could you please clone the latest vcpkg and reinstall the port? Thank you!

[ashari4]

Thanks, we are using b25cb779e5783531cc66562e224079b376055939 (Jan 7, 2022). We can update the version, but the question is around intermittent errors. Our CI pipelines use VCPKG to install zmq and occasionally hit the above 12007 error. Can the retry loop used by VCPKG be improved? I see that the VCPKG tool tries to download from https://www.7-zip.org/a/7z1900-x64.msi 4 times; perhaps, the VCPKG tool can try to download from different mirrors?

[Cheney-W]

This issue is more of a 7zip site issue, a random network issue.

[ashari4]

Thanks. Feel free to close if you don't think the download logic can be improved. Some possible improvements

1. use a different set of mirrors
2. wait before each retry attempt instead of immediately retrying.

[Cheney-W]

@BillyONeal What do you think about the two suggestions above?

[BillyONeal]

Thanks. Feel free to close if you don't think the download logic can be improved. Some possible improvements

1. use a different set of mirrors

If you have better ideas :)

2. wait before each retry attempt instead of immediately retrying.

We do do this: https://github.com/microsoft/vcpkg-tool/blob/91494e3e24f53270ba38749a325c36c6373699ed/src/vcpkg/base/downloads.cpp#L318

[Louis-Simon22]

For those like me who keep running into this problem:

You can download the file manually using another reliable method (browser, curl, etc.) then put it under vcpkg/downloads/7z1900-x64.msi yourself.

[Cheney-W]

We hope your question was answered to your satisfaction; if it wasn't, you can reopen with more info.