It's broken (see bug 1378361 comment 8) and is blocking the prototype app from even starting/being deployed. Let's remove the addon for now, seeing as we're not using ES on stage/prod anyway.

$ thd addons:destroy foundelasticsearch --confirm treeherder-prototype Destroying th-heroku-foundelasticsearch on treeherder-prototype... done $ thd config:remove ELASTICSEARCH_URL Unsetting ELASTICSEARCH_URL and restarting treeherder-prototype... done, v1719 ! Release command executing: this config change will not be available until the command ! succeeds. Use `heroku releases:output` to view the log. The build/release is now back to normal: https://dashboard.heroku.com/apps/treeherder-prototype/activity/builds/d8d450b6-6710-46b9-a233-fe055ff0f27a https://dashboard.heroku.com/apps/treeherder-prototype/activity/releases/2c9877c1-9a19-4751-88eb-d0df5a513b2d