This document describes Celery 3.1. For development docs, go here.
This document contains change notes for bugfix releases in the 3.1.x series (Cipater), please see What’s new in Celery 3.1 (Cipater) for an overview of what’s new in Celery 3.1.
|release-date:||2013-12-02 6:00 P.M UTC|
Now depends on billiard 22.214.171.124.
Now depends on Kombu 3.0.7.
Fixed problem where Mingle caused the worker to hang at startup (Issue #1686).
Beat: Would attempt to drop privileges twice (Issue #1708).
Windows: Fixed error with geteuid not being available (Issue #1676).
Tasks can now provide a list of expected error classes (Issue #1682).
The list should only include errors that the task is expected to raise during normal operation:@task(throws=(KeyError, HttpNotFound))
What happens when an exceptions is raised depends on the type of error:
Expected errors (included in Task.throws)
Will be logged using severity INFO, and traceback is excluded.
Will be logged using severity ERROR, with traceback included.
Cache result backend now compatible with Python 3 (Issue #1697).
CentOS init script: Now compatible with sys-v style init symlinks.
Fix contributed by Jonathan Jordan.
Events: Fixed problem when task name is not defined (Issue #1710).
Fix contributed by Mher Movsisyan.
Task: Fixed unbound local errors (Issue #1684).
Fix contributed by Markus Ullmann.
Canvas: Now unrolls groups with only one task (optimization) (Issue #1656).
Task: Fixed problem with eta and timezones.
Fix contributed by Alexander Koval.
Django: Worker now performs model validation (Issue #1681).
Task decorator now emits less confusing errors when used with incorrect arguments (Issue #1692).
Task: New method Task.send_event can be used to send custom events to Flower and other monitors.
Fixed a compatibility issue with non-abstract task classes
Events from clients now uses new node name format (gen<pid>@<hostname>).
Fixed rare bug with Callable not being defined at interpreter shutdown (Issue #1678).
Fix contributed by Nick Johnson.
Fixed Python 2.6 compatibility (Issue #1679).
|release-date:||2013-11-21 6:20 P.M UTC|
Now depends on Kombu 3.0.6.
Now depends on billiard 126.96.36.199
App: config_from_object is now lazy (Issue #1665).
App: autodiscover_tasks is now lazy.
Django users should now wrap access to the settings object in a lambda:app.autodiscover_tasks(lambda: settings.INSTALLED_APPS)
this ensures that the settings object is not prepared prematurely.
Fixed regression for --app argument experienced by some users (Issue #1653).
Worker: Now respects the --uid and --gid arguments even if --detach is not enabled.
Beat: Now respects the --uid and --gid arguments even if --detach is not enabled.
Python 3: Fixed unorderable error occuring with the worker -B argument enabled.
celery.VERSION is now a named tuple.
maybe_signature(list) is now applied recursively (Issue #1645).
celery shell command: Fixed IPython.frontend deprecation warning.
The default app no longer includes the builtin fixups.
This fixes a bug where celery multi would attempt to load the Django settings module before entering the target working directory.
The Django daemonization tutorial was changed.
Users no longer have to explicitly export DJANGO_SETTINGS_MODULE in /etc/default/celeryd when the new project layout is used.
Redis result backend: expiry value can now be 0 (Issue #1661).
Censoring settings now accounts for non-string keys (Issue #1663).
App: New autofinalize option.
Apps are automatically finalized when the task registry is accessed. You can now disable this behavior so that an exception is raised instead.
Example:app = Celery(autofinalize=False) # raises RuntimeError tasks = app.tasks @app.task def add(x, y): return x + y # raises RuntimeError add.delay(2, 2) app.finalize() # no longer raises: tasks = app.tasks add.delay(2, 2)
The worker did not send monitoring events during shutdown.
Worker: Mingle and gossip is now automatically disabled when used with an unsupported transport (Issue #1664).
celery command: Preload options now supports the rare --opt value format (Issue #1668).
celery command: Accidentally removed options appearing before the subcommand, these are now moved to the end instead.
Worker now properly responds to inspect stats commands even if received before startup is complete (Issue #1659).
task_postrun is now sent within a finally block, to make sure the signal is always sent.
Beat: Fixed syntax error in string formatting.
Contributed by nadad.
Fixed typos in the documentation.
Fixes contributed by Loic Bistuer, sunfinite.
Nested chains now works properly when constructed using the chain type instead of the | operator (Issue #1656).
|release-date:||2013-11-15 11:40 P.M UTC|
Now depends on Kombu 3.0.5.
Now depends on billiard 188.8.131.52
Worker accidentally set a default socket timeout of 5 seconds.
Django: Fixup now sets the default app so that threads will use the same app instance (e.g. for manage.py runserver).
Worker: Fixed Unicode error crash at startup experienced by some users.
Calling .apply_async on an empty chain now works again (Issue #1650).
The celery multi show command now generates the same arguments as the start command does.
The --app argument could end up using a module object instead of an app instance (with a resulting crash).
Fixed a syntax error problem in the celerybeat init script.
Fix contributed by Vsevolod.
Tests now passing on PyPy 2.1 and 2.2.
|release-date:||2013-11-13 12:55 A.M UTC|
Fixed compatibility problem with Python 2.7.0 - 2.7.5 (Issue #1637)
unpack_from started supporting memoryview arguments in Python 2.7.6.
Worker: -B argument accidentally closed files used for logging.
Task decorated tasks now keep their docstring (Issue #1636)
|release-date:||2013-11-12 08:00 P.M UTC|
Now depends on billiard 184.108.40.206
No longer needs the billiard C extension to be installed.
The worker silently ignored task errors.
Django: Fixed ImproperlyConfigured error raised when no database backend specified.
Fix contributed by j0hnsmith
Prefork pool: Now using _multiprocessing.read with memoryview if available.
close_open_fds now uses os.closerange if available.
get_fdmax now takes value from sysconfig if possible.
|release-date:||2013-11-11 06:30 P.M UTC|
Now depends on billiard 220.127.116.11.
Python 3: Fixed compatibility issues.
Windows: Accidentally showed warning that the billiard C extension was not installed (Issue #1630).
Django: Tutorial updated with a solution that sets a default DJANGO_SETTINGS_MODULE so that it doesn’t have to be typed in with the celery command.
Also fixed typos in the tutorial, and added the settings required to use the Django database backend.
Thanks to Chris Ward, orarbel.
Django: Fixed a problem when using the Django settings in Django 1.6.
Django: Fixup should not be applied if the django loader is active.
Worker: Fixed attribute error for human_write_stats when using the compatibility prefork pool implementation.
Worker: Fixed compatibility with billiard without C extension.
Inspect.conf: Now supports a with_defaults argument.
Group.restore: The backend argument was not respected.