Comment 3 for bug 56416

The fetching of the .manifest file from releases.ubuntu.com is the only place where such a failure can cause the mirror prober to crash. I agree that it should be fixed, but the fetching of that file is something that we depend in order to probe any release mirror, that's why I said we have to stop the probing of release mirrors when it occur.

Anyway, this is just to explain that it's not a failure of the prober to detect a broken mirror, instead it's a failure caused when we fail to fetch a file that is essential for the probing of all release mirrors.