Debian 8 jessie repo error

On a Debian 8 server, when running apt update, got following error

W: Failed to fetch http://mirror.com/debian/dists/jessie/main/source/Sources  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie/non-free/source/Sources  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie/contrib/source/Sources  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie/main/binary-amd64/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie/non-free/binary-amd64/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie/contrib/binary-amd64/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie/main/binary-i386/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie/non-free/binary-i386/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie/contrib/binary-i386/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie-updates/main/source/Sources  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie-updates/contrib/source/Sources  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie-updates/non-free/source/Sources  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie-updates/main/binary-amd64/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie-updates/contrib/binary-amd64/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie-updates/non-free/binary-amd64/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie-updates/main/binary-i386/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie-updates/contrib/binary-i386/Packages  404  Not Found [IP: 185.194.238.133 80]
W: Failed to fetch http://mirror.com/debian/dists/jessie-updates/non-free/binary-i386/Packages  404  Not Found [IP: 185.194.238.133 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.

To fix it, run

cp /etc/apt/sources.list /etc/apt/sources.list.backup
vi /etc/apt/sources.list

Add following content to the file

deb http://cdn-fastly.deb.debian.org/debian/ jessie main
deb-src http://cdn-fastly.deb.debian.org/debian/ jessie main
deb http://security.debian.org/ jessie/updates main
deb-src http://security.debian.org/ jessie/updates main
deb http://archive.debian.org/debian jessie-backports main
deb-src http://archive.debian.org/debian jessie-backports main

Create

vi /etc/apt/apt.conf

Add

Acquire::Check-Valid-Until "false";