unable to install
followed https://developer.atlassian.com/docs/getting-started/set-up-the-atlassian-plugin-sdk-and-build-a-project/install-the-atlassian-sdk-on-a-linux-or-mac-system

cd /etc/yum.repos.d/
wget http://sdkrepo.atlassian.com/atlassian-sdk-stable.repo
yum makecache
yum install atlassian-plugin-sdk
Geladene Plugins: fastestmirror, langpacks, nvidia, product-id, search-disabled-repos, subscription-manager
This system is not registered with Subscription Management. You can use subscription-manager to register.
[nvidia]: No NVIDIA display devices found
Loading mirror speeds from cached hostfile

• base: artfiles.org
• updates: artfiles.org
  Abhängigkeiten werden aufgelöst
  --> Transaktionsprüfung wird ausgeführt
  ---> Paket atlassian-plugin-sdk.noarch 0:5.1.9-1 markiert, um installiert zu werden
  --> Abhängigkeitsauflösung beendet

Abhängigkeiten aufgelöst

=============================================================================================================================================================================
Package Arch Version Paketquelle Größe
=============================================================================================================================================================================
Installieren:
atlassian-plugin-sdk noarch 5.1.9-1 atlassian-sdk-stable 40 M

Transaktionsübersicht
=============================================================================================================================================================================
Installieren 1 Paket

Gesamte Downloadgröße: 40 M
Installationsgröße: 56 M
Is this ok [y/d/N]: y
Downloading packages:
sdk-installer-5.1.9.rpm FAILED
http://sdkrepo.atlassian.com/rpm-stable/sdk-installer-5.1.9.rpm: [Errno 14] HTTP Error 404 - Not Found ] 0.0 B/s | 0 B -::- ETA
Anderer Spiegelserver wird versucht.
To address this issue please refer to the below knowledge base article

https://access.redhat.com/articles/1320623

If above article doesn't help to resolve this issue please create a bug on https://bugs.centos.org/

Error downloading packages:
atlassian-plugin-sdk-5.1.9-1.noarch: [Errno 256] No more mirrors to try.

[root]#

but:
http://sdkrepo.atlassian.com/rpm-stable/
does not contain 5.1.9, but many newer versions:
atlassian-plugin-sdk-5.0.6.noarch.rpm 44089490 10-Aug-2015 09:27
atlassian-plugin-sdk-5.1.0.noarch.rpm 43205265 10-Aug-2015 09:27
atlassian-plugin-sdk-5.1.1.noarch.rpm 43204305 11-Aug-2015 10:55
atlassian-plugin-sdk-5.1.10.noarch.rpm 41469402 16-Sep-2015 01:04
atlassian-plugin-sdk-5.1.2.noarch.rpm 41468920 04-Sep-2015 07:16
atlassian-plugin-sdk-5.1.9.noarch.rpm 41469525 14-Sep-2015 14:00
atlassian-plugin-sdk-6.1.0.noarch.rpm 41941187 19-Oct-2015 02:50
atlassian-plugin-sdk-6.2.0.noarch.rpm 41936239 07-Dec-2015 15:14
atlassian-plugin-sdk-6.2.1.noarch.rpm 41936307 14-Dec-2015 11:14
atlassian-plugin-sdk-6.2.2.noarch.rpm 41926123 14-Dec-2015 12:31
atlassian-plugin-sdk-6.2.3.noarch.rpm 35590171 23-Feb-2016 10:51
atlassian-plugin-sdk-6.2.4.noarch.rpm 35580052 05-Mar-2016 22:08