gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>

Question

I've installed gunicorn inside my virtualenv.

From this directory:

manage.py

/onbytes/wsgi.py

I run the following:

gunicorn onbytes.wsgi:application

And I get the following error:

Traceback (most recent call last):

  File "/home/ymorin007/.virtualenvs/onbytes.com/bin/gunicorn", line 9, in <module>

    load_entry_point('gunicorn==19.0.0', 'console_scripts', 'gunicorn')()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 74, in run

    WSGIApplication("%(prog)s [OPTIONS] [APP_MODULE]").run()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/app/base.py", line 166, in run

    super(Application, self).run()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/app/base.py", line 71, in run

    Arbiter(self).run()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/arbiter.py", line 169, in run

    self.manage_workers()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/arbiter.py", line 477, in manage_workers

    self.spawn_workers()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/arbiter.py", line 537, in spawn_workers

    time.sleep(0.1 * random.random())

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/arbiter.py", line 209, in handle_chld

    self.reap_workers()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/arbiter.py", line 459, in reap_workers

    raise HaltServer(reason, self.WORKER_BOOT_ERROR)

gunicorn.errors.HaltServer: <HaltServer 'Worker failed to boot.' 3>

Now running gunicorn onbytes.wsgi:application --preload will get me this error:

Traceback (most recent call last):

  File "/home/ymorin007/.virtualenvs/onbytes.com/bin/gunicorn", line 9, in <module>

    load_entry_point('gunicorn==19.0.0', 'console_scripts', 'gunicorn')()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 74, in run

    WSGIApplication("%(prog)s [OPTIONS] [APP_MODULE]").run()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/app/base.py", line 166, in run

    super(Application, self).run()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/app/base.py", line 71, in run

    Arbiter(self).run()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/arbiter.py", line 57, in __init__

    self.setup(app)

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/arbiter.py", line 113, in setup

    self.app.wsgi()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/app/base.py", line 66, in wsgi

    self.callable = self.load()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 65, in load

    return self.load_wsgiapp()

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/app/wsgiapp.py", line 52, in load_wsgiapp

    return util.import_app(self.app_uri)

  File "/home/ymorin007/.virtualenvs/onbytes.com/local/lib/python2.7/site-packages/gunicorn/util.py", line 356, in import_app

    __import__(module)

  File "/home/ymorin007/sites/onbytes.com/src/onbytes/wsgi.py", line 8, in <module>

    from django.core.wsgi import get_wsgi_application

ImportError: No module named django.core.wsgi

Answer 1

Probably there is an issue in your application, not in gunicorn.

Try:

gunicorn --log-file=- onbytes.wsgi:application

Since the version R19, Gunicorn doesn’t log by default in the console and the --debug option was deprecated.

To know more about this you can have a look at the following video:-