The aerogear cartridge requires a medium-sized gear, as of this change:
https://github.com/aerogear/openshift-origin-cartridge-aerogear-push/commit/9dc0b2595f7b58beaf538947c2670c673d38f1f5

This means that aerogear carts won't run properly under free OpenShift Online accounts, since they are limited to Small gears. As the change above makes clear, this wasn't always the case.

The README for this cart needs to be clear about what the expected behavior for this cartridge will be when deployed onto a small gear. It also needs to note the change more prominently and possibly describe how a user could roll back their deployment to a commit id that will work with small gears.

The confusion may originate with users attempting to deploy the cart via the web interface at hub.openshift.com: https://hub.openshift.com/quickstarts/31-aerogear-push-1-x-quickstart

If the cart cannot be made to work with small gears, it needs to express this requirement in such a way that the web UI can check for that (if possible) or perhaps be de-listed from hub.openshift.com, since it can no longer be used by free-tier customers.

This issue affects at least two OpenShift Online customers.