A bug in the appstream package was released on stable couple of hours ago. The issue was reported on 2016-05-09 on Launchpad and the fix released 5 hours ago (2016-05-20 04:35:54 AST). Now it can be seen that the bug was ill managed, and the fixes weren't pushed fast enough so it doesn't hit the general population.
And more importantly of all, all the workarounds are posted on said bug report, so Ask Ubuntu is effectively just duplicating information, and it's nothing even insightful. Now as Jorge Castro puts it nicely:
I don't really see how reposting bug reports here will help anyone, all it will do is drive users away. And by users I don't mean the people having the problem, I mean the experts that answer the questions. No one wants to work in a bug tracker all day, and then come to AU and end up with even worse bug reports.
These questions drive experts away, and ultimately are just temporary problems.
There are 3 questions on the Hot Questions Network featured in the sidebar which gives other sites users the impression that this site is for helping people "fix Ubuntu bugs", while the main purpose is actually answer questions. Can we just close/delete them all?
A quick list of them:
- 16.04 apt update never ends
- appstreamcli hanging with 100% CPU usage during update
- sudo apt-get update cancelled half way through, now cannot run sudo apt-get update
- I cannot run apt update properly - apt update hangs
- apt-get is stuck at "Fetched XXKb in XXsec"
Also, check the linked questions in the side bar. It may have new questions.