Changelog - 2014


Please see Changelog for the latest changes.

19.1.1 / 2014-08-16




  • fix issue 838: statsd logger, send statsd timing metrics in milliseconds

  • fix issue 839: statsd logger, allows for empty log message while pushing metrics and restore worker number in DEBUG logs

  • fix issue 850: add timezone to logging

  • fix issue 853: Respect logger_class setting unless statsd is on

AioHttp worker

  • fix issue 830 make sure gaiohttp worker is shipped with gunicorn.

19.1 / 2014-07-26



  • fix issue 785: handle binary type address given to a client socket address

  • fix graceful shutdown. make sure QUIT and TERMS signals are switched everywhere.

  • issue 799: fix support loading config from module

  • issue 805: fix check for file-like objects

  • fix issue 815: args validation in WSGIApplication.init

  • fix issue 787: check if we load a pyc file or not.

Tornado worker

AioHttp worker

  • fix: fetch all body in input. fix issue 803

  • fix: don’t install the worker if python < 3.3

  • fix issue 822: Support UNIX sockets in gaiohttp worker

Async worker

  • fix issue 790: StopIteration shouldn’t be caught at this level.



  • fix issue 809: Set global logging configuration from a Paste config.


  • fix RuntimeError in gunicorn.reloader (issue 807)


19.0 / 2014-06-12

Gunicorn 19.0 is a major release with new features and fixes. This version improve a lot the usage of Gunicorn with python 3 by adding two new workers to it: gthread a fully threaded async worker using futures and gaiohttp a worker using asyncio.

Breaking Changes

Switch QUIT and TERM signals

With this change, when gunicorn receives a QUIT all the workers are killed immediately and exit and TERM is used for the graceful shutdown.

Note: the old behaviour was based on the NGINX but the new one is more correct according the following doc:

also it is complying with the way the signals are sent by heroku:


run_gunicorn, gunicorn_django and gunicorn_paster are now completely deprecated and will be removed in the next release. Use the gunicorn command instead.



  • add aiohttp worker named gaiohttp using asyncio. Full async worker on python 3.

  • fix HTTP-violating excess whitespace in write_error output

  • fix: try to log what happened in the worker after a timeout, add a worker_abort hook on SIGABRT signal.

  • fix: save listener socket name in workers so we can handle buffered keep-alive requests after the listener has closed.

  • add on_exit hook called just before exiting gunicorn.

  • add support for python 3.4

  • fix: do not swallow unexpected errors when reaping

  • fix: remove incompatible SSL option with python 2.6

  • add new async gthread worker and –threads options allows to set multiple threads to listen on connection

  • deprecate gunicorn_django and gunicorn_paster

  • switch QUIT and TERM signal

  • reap workers in SIGCHLD handler

  • add universal wheel support

  • use email.utils.formatdate in gunicorn.util.http_date

  • deprecate the –debug option

  • fix: log exceptions that occur after response start …

  • allows loading of applications from .pyc files (#693)

  • fix: issue #691, raw_env config file parsing

  • use a dynamic timeout to wait for the optimal time. (Reduce power usage)

  • fix python3 support when notifying the arbiter

  • add: honor $WEB_CONCURRENCY environment variable. Useful for heroku setups.

  • add: include tz offset in access log

  • add: include access logs in the syslog handler.

  • add –reload option for code reloading

  • add the capability to load gunicorn.base.Application without the loading of the arguments of the command line. It allows you to embed gunicorn in your own application.

  • improve: set wsgi.multithread to True for async workers

  • fix logging: make sure to redirect wsgi.errors when needed

  • add: syslog logging can now be done to a unix socket

  • fix logging: don’t try to redirect stdout/stderr to the logfile.

  • fix logging: don’t propagate log

  • improve logging: file option can be overridden by the gunicorn options –error-logfile and –access-logfile if they are given.

  • fix: don’t override SERVER_* by the Host header

  • fix: handle_error

  • add more option to configure SSL

  • fix: sendfile with SSL

  • add: worker_int callback (to react on SIGTERM)

  • fix: don’t depend on entry point for internal classes, now absolute modules path can be given.

  • fix: Error messages are now encoded in latin1

  • fix: request line length check

  • improvement: proxy_allow_ips: Allow proxy protocol if “*” specified

  • fix: run worker’s setup method before setting num_workers

  • fix: FileWrapper inherit from object now

  • fix: Error messages are now encoded in latin1

  • fix: don’t spam the console on SIGWINCH.

  • fix: logging -don’t stringify T and D logging atoms (#621)

  • add support for the latest django version

  • deprecate run_gunicorn django option

  • fix: sys imported twice

gevent worker

  • fix: make sure to stop all listeners

  • fix: monkey patching is now done in the worker

  • fix: “global name ‘hub’ is not defined”

  • fix: reinit hub on old versions of gevent

  • support gevent 1.0

  • fix: add subprocess in monkey patching

  • fix: add support for multiple listener

eventlet worker

  • fix: merge duplicate EventletWorker.init_process method (fixes #657)

  • fix: missing errno import for eventlet sendfile patch

  • fix: add support for multiple listener

tornado worker

  • add graceful stop support