Tobias Sachs

Still unable to use the Launcher if you disable IPv6!

help.mojang.com and bugs.mojang.com too!

launchermeta.mojang.com does NOT resolve IPv6 Addresses. So the Launcher is unable to display News, Serverstatus, latest version if not already available, download Minecraft, get token for online play, ..

Could not get manifest from piston backend.

[0619/002531:WARNING:FileDownloadClient.cpp(216)] Couldn't download '/Users/X/Library/Application Support/minecraft/assets/indexes/1.14.json': failed_to_download[0619/002531:INFO:GameCallbacks.cpp(198)] launcher/launcher (main) error Unable to download https://launchermeta.mojang.com/v1/packages/15e65156137b14ed9793c7b0609c14393cf2c156/1.14.json to /Users/X/Library/Application Support/minecraft/assets/indexes/1.14.json[0619/002531:ERROR:FileDownloadClient.cpp(166)] Couldn't delete temporary file . after error: Invalid argument[0619/002531:ERROR:GameCallbacks.cpp(56)] failed_to_download
Details: Request error -105: ERR_NAME_NOT_RESOLVED
URL: https://launchermeta.mojang.com/v1/packages/15e65156137b14ed9793c7b0609c14393cf2c156/1.14.json
Name: 1.14.json
File: /Users/X/Library/Application Support/minecraft/assets/indexes/1.14.json

@Urielsalis the Path is c:/ thus it is a Windows OS 😉

What is with Linux?

Hey @Galxy_2Alex,

yes this issue ist still exist.

Successfully downloaded https://launcher.mojang.com/mc/game/17w06a/client/UUID/client.jar to C:/Users%username%\AppData\Roaming\.minecraft\versions\17w06a/17w06a.jar

The new launcher ist using https://toolbox.googleapps.com/apps/dig/#AAAA/launcher.mojang.com
which resolves to https://toolbox.googleapps.com/apps/dig/#AAAA/da2uwvc3too2a.cloudfront.net

But there is no IPv6 support.

@ziggurism yes it is. But you need to change the security-group in EC2 and S3 to enable / not block IPv6.

For EC2 this is documented here: https://aws.amazon.com/de/blogs/aws/new-ipv6-support-for-ec2-instances-in-virtual-private-clouds/

For S3 I've tested it and it is possible. Mojang only needs to change s3.amazonaws.com to s3.dualstack.us-east-1.amazonaws.com.

Is there a reason why this is not prioritized? You only need to change

For example https://s3.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma

Needs to be https://s3.dualstack.us-east-1.amazonaws.com/Minecraft.Download/launcher/launcher.pack.lzma (verified - is functional)

This enables IPv6 downloads for all OS wich prefer IPv6 over IPv4. If there is no IPv6 available/enabled then the OS will use IPv4. So there should be only an impact if the IPv6 implementation is not correct/broken. But every downloader should automatically switch over to IPv4.