Application's dyno hours exhausted Error

{"uri":"https://www.rehttp.net/","favicon":"http://www.rehttp.net/favicon.ico","login":"yegor256","id":"a19c","hostname":"rehttp.net","failures":4764,"pings":703937,"up":false,"created":"2019-05-30 04:24:52 +0000","log":"2026-04-29 21:17:36 +0000\n\nGET / HTTP/1.1\naccept-encoding: gzip;q=1.0,deflate;q=0.6,identity;q=0.3\naccept: */*\nuser-agent: SixNines.io (not Firefox, Chrome, or Safari)\nconnection: close\nhost: www.rehttp.net\n\n\nHTTP/1.1 503 Service Unavailable\ncache-control: no-cache, no-store\ncontent-type: text/html; charset=utf-8\nnel: {\"report_to\":\"heroku-nel\",\"response_headers\":[\"Via\"],\"max_age\":3600,\"success_fraction\":0.01,\"failure_fraction\":0.1}\nreport-to: {\"group\":\"heroku-nel\",\"endpoints\":[{\"url\":\"https://nel.heroku.com/reports?s=%2Bs931igCm2B4KOR5acC0Y6TpWeljYwqirG6gmItKazk%3D\\u0026sid=e11707d5-02a7-43ef-b45e-2cf4d2036f7d\\u0026ts=1777497456\"}],\"max_age\":3600}\nreporting-endpoints: heroku-nel=\"https://nel.heroku.com/reports?s=%2Bs931igCm2B4KOR5acC0Y6TpWeljYwqirG6gmItKazk%3D&sid=e11707d5-02a7-43ef-b45e-2cf4d2036f7d&ts=1777497456\"\nserver: Heroku\nvia: 1.1 heroku-router\ndate: Wed, 29 Apr 2026 21:17:36 GMT\ncontent-length: 594\nconnection: close\n\n\n \n \n \n Application's dyno hours exhausted Error\n ...","updated":"2026-04-29 21:17:36 +0000","flipped":"2026-04-15 16:53:09 +0000","expires":"2026-04-29 21:18:36 +0000"}