self.stop()
2019-07-19T20:44:36.871606+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/arbiter.py", line 393, in stop
2019-07-19T20:44:36.871764+00:00 app[web.1]: time.sleep(0.1)
2019-07-19T20:44:36.871769+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/arbiter.py", line 245, in handle_chld
2019-07-19T20:44:36.871953+00:00 app[web.1]: self.reap_workers()
2019-07-19T20:44:36.871958+00:00 app[web.1]: File "/app/.heroku/python/lib/python3.7/site-packages/gunicorn/arbiter.py", line 525, in reap_workers
2019-07-19T20:44:36.872299+00:00 app[web.1]: raise HaltServer(reason, self.WORKER_BOOT_ERROR)
2019-07-19T20:44:36.872338+00:00 app[web.1]: gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>