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I am using Raspberry Pi 3 Model B, and installed raspbian-buster on it.

sudo apt-get update works well. But sudo apt-get upgrade shows connection failed.

Err:29 http://archive.raspberrypi.org/debian buster/main armhf arandr all 0.1.9-2+rpt4

Connection failed [IP: 93.93.128.230 80]

Err:1 http://mirrors.ocf.berkeley.edu/raspbian/raspbian buster/main armhf cron armhf 3.0pl1-134

Connection failed [IP: 169.229.226.30 80]

Err:30 http://archive.raspberrypi.org/debian buster/main armhf libraspberrypi-doc armhf 1.20190620+1-1

Connection failed [IP: 93.93.130.39 80]

Err:2 http://mirrors.ocf.berkeley.edu/raspbian/raspbian buster/main armhf libk5crpyto3 armhf 1.17-3

Connection failed [IP: 169.229.226.30 80]

Err:31 http://archive.raspberrypi.org/debian buster/main armhf libraspberrypi-dev armhf 1.20190620+1-1

Connection failed [IP: 93.93.130.104 80]

..........

When I pinged to that IP addresses, there was no packet loss.

I tried sudo apt-get clean, but the same problem still occurs.

  • When you say the problem is not solved, do you mean that you still get a failed connection, or that you now have a connection, but the apt system isn't able to recover? – Ben Crowell Jun 26 '19 at 21:40
  • @BenCrowell Still same problem(connection failed). edited – dolgom Jun 26 '19 at 21:54
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    Unfortunately this is not uncommon just after the Foundation does a major release. Keep trying – Milliways Jun 26 '19 at 22:00
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As Milliways said, it seems because of the problem in the major release.

After I downgrade to Stretch, the 'connection failed' problem does not occur.

  • Please accept your answer with click on the tick on the left side. It finishes the question and will not pop up again months for months. – Ingo Nov 24 '19 at 18:41

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