Application crashes after "Update DATABASE by heroku-postgresql"

Question

Since yesterday, when heroku-postgresql made an automatic update to the add-on, the application doesn't open anymore. Instead, it crashed with a "error error: password authentication failed for user "neyzbgqnexgsom"" message that I can see in the Heroku logs tail.

My app was working fine for about 3 months, and it started crashing right after this. How can I make it work back again?

Answer 1

I found out that after that update, the DATABASE_URL config variable has changed. You must populate the Config Vars once again with the new values from the DATABASE_URL.