Resolved
This incident is now resolved. The impact start time was 2023-08-18 16:53 UTC, and the end time was 2023-08-19 00:44 UTC.
Update
We are still actively investigating this issue and will post more updates soon.
Update
Our engineers have identified the issue and are working to restore the dyno boot process in the EU region.
Issue
Some Common Runtime customers with apps in the EU region may experience “H20 - App Boot Timeout” errors when using basic dynos, preventing new dynos from starting. They may also see an error message "One or more of these arguments were missing: uid, gid, gateway, somaxconn, eventfd, outfd". Our engineers are investigating the issue and we will continue to post updates.