Apt is throwing a 404 error on the 5.x repo. My source file contains
deb https://artifacts.elastic.co/packages/5.x/apt jessie main stable
The log output shows.
Hit http://security.debian.org jessie/updates InRelease
Hit http://cloudfront.debian.net jessie-backports InRelease
Get:1 http://cloudfront.debian.net jessie-backports/main Sources/DiffIndex [27.8 kB]
Hit http://security.debian.org jessie/updates/non-free Sources
Get:2 http://cloudfront.debian.net jessie-backports/main amd64 Packages/DiffIndex [27.8 kB]
Ign http://httpredir.debian.org jessie InRelease
Hit http://security.debian.org jessie/updates/non-free amd64 Packages
Hit http://httpredir.debian.org jessie-updates InRelease
Get:3 http://cloudfront.debian.net jessie-backports/main Translation-en/DiffIndex [27.8 kB]
Hit http://security.debian.org jessie/updates/non-free Translation-en
Hit http://httpredir.debian.org jessie Release.gpg
Hit http://security.debian.org jessie/updates/main Sources
Hit http://security.debian.org jessie/updates/contrib Sources
Get:4 https://artifacts.elastic.co jessie InRelease [310 B]
Ign https://artifacts.elastic.co jessie InRelease
Hit http://security.debian.org jessie/updates/main amd64 Packages
Hit http://httpredir.debian.org jessie-updates/main Sources
Hit http://security.debian.org jessie/updates/contrib amd64 Packages
Hit http://security.debian.org jessie/updates/contrib Translation-en
Get:5 https://artifacts.elastic.co jessie Release.gpg [312 B]
Hit http://security.debian.org jessie/updates/main Translation-en
Hit http://httpredir.debian.org jessie-updates/contrib Sources
Ign https://artifacts.elastic.co jessie Release.gpg
Hit http://httpredir.debian.org jessie-updates/non-free Sources
Get:6 https://artifacts.elastic.co jessie Release [308 B]
Ign https://artifacts.elastic.co jessie Release
Get:7 http://httpredir.debian.org jessie-updates/main amd64 Packages/DiffIndex [8,884 B]
Get:8 https://artifacts.elastic.co jessie/main amd64 Packages [331 B]
Hit http://httpredir.debian.org jessie-updates/contrib amd64 Packages
Get:9 https://artifacts.elastic.co jessie/stable amd64 Packages [333 B]
Get:10 http://httpredir.debian.org jessie-updates/non-free amd64 Packages/DiffIndex [736 B]
Get:11 https://artifacts.elastic.co jessie/main Translation-en_US [332 B]
Hit http://httpredir.debian.org jessie-updates/contrib Translation-en
Get:12 https://artifacts.elastic.co jessie/main Translation-en [329 B]
Get:13 http://httpredir.debian.org jessie-updates/main Translation-en/DiffIndex [3,688 B]
Get:14 https://artifacts.elastic.co jessie/stable Translation-en_US [334 B]
Get:15 http://httpredir.debian.org jessie-updates/non-free Translation-en/DiffIndex [736 B]
Get:16 https://artifacts.elastic.co jessie/stable Translation-en [331 B]
Hit http://httpredir.debian.org jessie Release
Get:17 https://artifacts.elastic.co jessie/main amd64 Packages [331 B]
Hit http://httpredir.debian.org jessie/main Sources
Get:18 https://artifacts.elastic.co jessie/stable amd64 Packages [333 B]
Hit http://httpredir.debian.org jessie/contrib Sources
Hit http://httpredir.debian.org jessie/non-free Sources
Get:19 https://artifacts.elastic.co jessie/main Translation-en_US [332 B]
Hit http://httpredir.debian.org jessie/main amd64 Packages
Get:20 https://artifacts.elastic.co jessie/main Translation-en [329 B]
Hit http://httpredir.debian.org jessie/contrib amd64 Packages
Get:21 https://artifacts.elastic.co jessie/stable Translation-en_US [334 B]
Hit http://httpredir.debian.org jessie/non-free amd64 Packages
Get:22 https://artifacts.elastic.co jessie/stable Translation-en [331 B]
Hit http://httpredir.debian.org jessie/contrib Translation-en
Get:23 https://artifacts.elastic.co jessie/main amd64 Packages [331 B]
Hit http://httpredir.debian.org jessie/main Translation-en
Get:24 https://artifacts.elastic.co jessie/stable amd64 Packages [333 B]
Hit http://httpredir.debian.org jessie/non-free Translation-en
Get:25 https://artifacts.elastic.co jessie/main Translation-en_US [332 B]
Get:26 https://artifacts.elastic.co jessie/main Translation-en [329 B]
Get:27 https://artifacts.elastic.co jessie/stable Translation-en_US [334 B]
Get:28 https://artifacts.elastic.co jessie/stable Translation-en [331 B]
Get:29 https://artifacts.elastic.co jessie/main amd64 Packages [331 B]
Get:30 https://artifacts.elastic.co jessie/stable amd64 Packages [333 B]
Get:31 https://artifacts.elastic.co jessie/main Translation-en_US [332 B]
Get:32 https://artifacts.elastic.co jessie/main Translation-en [329 B]
Get:33 https://artifacts.elastic.co jessie/stable Translation-en_US [334 B]
Get:34 https://artifacts.elastic.co jessie/stable Translation-en [331 B]
Get:35 https://artifacts.elastic.co jessie/main amd64 Packages [331 B]
Err https://artifacts.elastic.co jessie/main amd64 Packages
HttpError404
Get:36 https://artifacts.elastic.co jessie/stable amd64 Packages [333 B]
Err https://artifacts.elastic.co jessie/stable amd64 Packages
HttpError404
Get:37 https://artifacts.elastic.co jessie/main Translation-en_US [332 B]
Ign https://artifacts.elastic.co jessie/main Translation-en_US
Get:38 https://artifacts.elastic.co jessie/main Translation-en [329 B]
Ign https://artifacts.elastic.co jessie/main Translation-en
Get:39 https://artifacts.elastic.co jessie/stable Translation-en_US [334 B]
Ign https://artifacts.elastic.co jessie/stable Translation-en_US
Get:40 https://artifacts.elastic.co jessie/stable Translation-en [331 B]
Ign https://artifacts.elastic.co jessie/stable Translation-en
Fetched 97.4 kB in 6s (14.2 kB/s)
W: Failed to fetch https://artifacts.elastic.co/packages/5.x/apt/dists/jessie/main/binary-amd64/Packages HttpError404
W: Failed to fetch https://artifacts.elastic.co/packages/5.x/apt/dists/jessie/stable/binary-amd64/Packages HttpError404
Am I doing it wrong?