>>! In T70271#1269328, @demon wrote:
> `its-phabricator-*` ones are mission-critical and must be upgraded and functioning. `github-create` primarily affects me and @qchris but would be nice to still have working. `deleteproject` we don't maintain but will have to rebuild. The remaining 4 are all bundled and should Just Work.

I can handle the `its-*` ones. Sure.

`delete-project` we can grab for example from http://builds.quelltextlich.at/gerrit/nightly/stable-2.11/2015-05-07/index.html#delete-project.jar to spare us manual building. (It currently builds, and can be loaded, but I have not tested whether or not it's working).

Not sure about `github-create` ... is the code for that anywhere in the open?

(I am sure people will also ask for Luca's github plugin to get nice and easy Pull-Reuest handling. There have been some authentication issues in that plugin lately ... not sure if that is currently in a working state or not).

But I think there are other deal-breakers (this list need not be exhaustive):
* In 2.11, our current default ChangeScreen is gone. Forcing people to use the new ChangeScreen and only to tell them to again cange to Differential in a few months(?). I'd consider that a no-go.
* In 2.11, the same Mina SSHD is used that is somewhat suspected by users to cause issues for 2.10.3.1. Debugging Mina SSHD is no fun. I had to do that twice. I don't want to do it again, just because we cannot downgrade and (maybe) 2.11's Mina SSHD causes issues.
*  The released 2.11 war lacks https://gerrit-review.googlesource.com/#/c/67490/1 which fixes mouse grab issues, and I'd consider it important.
* One person reported running out of heap after upgrading to 2.11. The reporter got it under controll by running garbage collection on their repos. But since downgrading again is somewhat not an option and some of our repos are big, one need to double-check and make sure that this does not bite us ... or if it bites wmf's gerrit, one needs to at least check that gc can reliably mitigate it for wmf.
* 'Generate HTTP Password' is gone. I know that at least a few people used this at WMF.

All in all ... I am not sure if now is the right time to upgrade to a 2.11 version. A few weeks down the road (and maybe after a new release in the 2.11 series), the middle three items go away. But the dropping of the our current default ChangeScreen will stay. People would get forced to use the New ChangeScreen.