Since this morning every Gradle build that needs anything from Google’s Maven repo fails with Could not HEAD 'https://dl.google.com/...' > Read timed out, and cached builds sit 90 seconds in configuration first.

It is not my machine. Gradle speaks HTTP/1.1 only, and the dl.google.com addresses my DNS returns (142.251.13.x) accept the connection and never answer an HTTP/1.1 request. HTTP/2 to the same URL answers instantly, which is why browsers are fine. A different Google front-end answers HTTP/1.1 normally from the same Wi-Fi:

# hangs for 20 s curl --http1.1 -sI --max-time 20 https://dl.google.com/dl/android/maven2/androidx/biometric/biometric/1.1.0/biometric-1.1.0.aar # HTTP/1.1 200 OK in 0.4 s curl --http1.1 -sI --resolve dl.google.com:443:172.217.16.142 https://dl.google.com/dl/android/maven2/androidx/biometric/biometric/1.1.0/biometric-1.1.0.aar

Ruled out: IPv4 vs IPv6, TLS 1.2 vs 1.3, plain port 80 (also hangs), proxies, VPN, filters. Other Google hosts answer HTTP/1.1 fine. I am on Vodafone cable in Germany.

Is anyone else seeing this today, and where? The first curl above tells you in 20 seconds. And where does one report a dl.google.com outage?

Workaround until it clears, remove it afterwards:

echo "172.217.16.142 dl.google.com" | sudo tee -a /etc/hosts
submitted by /u/quiet_flare
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