Could not launch Xcode Service on Xcode Server with Xcode 7.2.1
As Eimantas Vaiciunas post at Apple Developer Forums:
Since checkFirstLaunchStatus with sudo returned 69 I launched Xcode with sudo too:
sudo /Applications/Xcode.app/Contents/MacOS/Xcode
This launched Xcode with license agreement prompt and after agreeing, everything went fine.
sudo /Applications/Xcode.app/Contents/Developer/usr/bin/xcscontrol --initialize
Did the trick for me. Use on your own risk.