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@@ -44,7 +44,28 @@ and also supported on PyPy.
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Preface
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=======
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-XXX To be written
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+Welcome to Celery 4!
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+
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+This is a massive release with over two years of changes.
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+Not only does it come with many new features, but it also fixes
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+a massive list of bugs, so in many ways you could call it
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+our "Snow Leopard" release.
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+
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+The next major version of Celery will support Python 3.5 only, were
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+we are planning to take advantage of the new asyncio library.
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+
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+This release would not have been possible without the support
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+of my employer, `Robinhood`_ (we're hiring!).
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+
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+- Ask Solem
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+
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+Dedicated to Sebastian "Zeb" Bjørnerud (RIP),
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+with special thanks to `Ty Wilkins`_, for designing our new logo,
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+all the contributors who help make this happen, and my collegues
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+at `Robinhood`_.
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+
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+.. _`Ty Wilkins`: http://tywilkins.com
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+.. _`Robinhood`: http://robinhood.com
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Wall of Contributors
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--------------------
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@@ -80,9 +101,9 @@ Kracekumar Ramaraju, Krzysztof Bujniewicz, Latitia M. Haskins, Len Buckens,
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Lev Berman, lidongming, Lorenzo Mancini, Lucas Wiman, Luke Pomfrey,
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Luyun Xie, Maciej Obuchowski, Manuel Kaufmann, Marat Sharafutdinov,
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Marc Sibson, Marcio Ribeiro, Marin Atanasov Nikolov, Mathieu Fenniak,
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-Mark Parncutt, Maxime Beauchemin, Maxime Vdb, Mher Movsisyan, Michael Aquilina,
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-Michael Duane Mooring, Michael Permana, Mickaël Penhard, Mike Attwood,
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-Mitchel Humpherys, Mohamed Abouelsaoud, Morris Tweed, Morton Fox,
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+Mark Parncutt, Mauro Rocco, Maxime Beauchemin, Maxime Vdb, Mher Movsisyan,
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+Michael Aquilina, Michael Duane Mooring, Michael Permana, Mickaël Penhard,
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+Mike Attwood, Mitchel Humpherys, Mohamed Abouelsaoud, Morris Tweed, Morton Fox,
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Môshe van der Sterre, Nat Williams, Nathan Van Gheem, Nicolas Unravel,
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Nik Nyby, Omer Katz, Omer Korner, Ori Hoch, Paul Pearce, Paulo Bu,
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Pavlo Kapyshin, Philip Garnero, Pierre Fersing, Piotr Kilczuk,
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@@ -107,6 +128,12 @@ Vytis Banaitis, Zoran Pavlovic, Xin Li, 許邱翔, :github_user:`allenling`,
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:github_user:`orlo666`, :github_user:`raducc`, :github_user:`wanglei`,
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:github_user:`worldexception`, :github_user:`xBeAsTx`.
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+.. note::
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+
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+ This wall was automatically generated from git history,
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+ so sadly it doesn't not include the people who help with more important
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+ things like answering mailing-list questions.
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+
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Upgrading from Celery 3.1
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=========================
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@@ -223,7 +250,8 @@ Removed features
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The test suite is passing, and Celery seems to be working with Windows,
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but we make no guarantees as we are unable to diagnose issues on this
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- platform.
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+ platform. If you are a company requiring support on this platform,
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+ please get in touch.
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- Jython is no longer supported.
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@@ -242,7 +270,7 @@ Features removed for simplicity
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it's imported by the worker:
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https://github.com/celery/celery/blob/3.1/celery/task/http.py
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-- Task no longer sends error emails.
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+- Tasks no longer sends error emails.
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This also removes support for ``app.mail_admins``, and any functionality
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related to sending emails.
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@@ -260,7 +288,7 @@ Features removed for lack of funding
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We announced with the 3.1 release that some transports were
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moved to experimental status, and that there'd be no official
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-support for the transports, citing a lack of resources.
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+support for the transports.
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As this subtle hint for the need of funding failed
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we've removed them completely, breaking backwards compatibility.
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@@ -308,6 +336,9 @@ attempting to use them will raise an exception:
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Please use the ``rpc`` result backend for RPC-style calls, and a
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persistent result backend for multi-consumer results.
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+We think most of these can be fixed without considerable effort, so if you're
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+interested in getting any of these features back, please get in touch.
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+
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**Now to the good news**...
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New Task Message Protocol
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Ask Solem