When trying to connect to Heroku Postgres with a custom PGBouncer installation, all connections fail with an error like
WARNING server login failed: FATAL password authentication failed for user "..."
Note that this does not apply when using the Heroku PGBouncer buildpack.
- Use the Heroku PGBouncer buildpack
- Use the Postgres md5-hidden password format when configuring PGBouncer
- Wait for PGBouncer to merge this pull request which works around the issue by increasing the password buffer size and use a version that includes the fix [UPDATE: merged]
Any of the above should work around the issue