I think this is a combination of chains which are dependent on eachother, especially when you use Travis CI: 1st) apt-get not flexible enough to ignore that err

I think this is a combination of chains which are dependent on eachother, especially when you use Travis CI: 1st) apt-get not flexible enough to ignore that error on apt-get update 2nd) Travis CI having so much external stuff installed, it's a big big image which has more failure points 3rd) Docker repo failed.