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@@ -8,6 +8,64 @@ This document contains change notes for bugfix releases in the 3.1.x series
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(Cipater), please see :ref:`whatsnew-3.1` for an overview of what's
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new in Celery 3.1.
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+.. _version-3.1.21:
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+
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+3.1.21
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+======
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+:release-date: 2016-03-04 11:16 A.M PST
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+:release-by: Ask Solem
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+
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+- **Requirements**
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+
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+ - Now depends on :ref:`Kombu 3.0.34 <kombu:version-3.0.34>`.
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+
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+ - Now depends on :mod:`billiard` 3.3.0.23.
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+
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+- **Prefork pool**: Fixes 100% CPU loop on Linux epoll (Issue #1845).
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+
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+ Also potential fix for: Issue #2142, Issue #2606
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+
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+- **Prefork pool**: Fixes memory leak related to processes exiting
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+ (Issue #2927).
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+
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+- **Worker**: Fixes crash at startup when trying to censor passwords
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+ in MongoDB and Cache result backend URLs (Issue #3079, Issue #3045,
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+ Issue #3049, Issue #3068, Issue #3073).
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+
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+ Fix contributed by Maxime Verger.
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+
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+- **Task**: An exception is now raised if countdown/expires is less
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+ than -2147483648 (Issue #3078).
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+
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+- **Programs**: :program:`celery shell --ipython` now compatible with newer
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+ IPython versions.
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+
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+- **Programs**: The DuplicateNodeName warning emitted by inspect/control
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+ now includes a list of the node names returned.
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+
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+ Contributed by Sebastian Kalinowski.
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+
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+- **Utils**: The ``.discard(item)`` method of
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+ :class:`~celery.datastructures.LimitedSet` did not actually remove the item
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+ (Issue #3087).
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+
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+ Fix contributed by Dave Smith.
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+
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+- **Worker**: Node name formatting now emits less confusing error message
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+ for unmatched format keys (Issue #3016).
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+
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+- **Results**: amqp/rpc backends: Fixed deserialization of JSON exceptions
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+ (Issue #2518).
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+
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+ Fix contributed by Allard Hoeve.
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+
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+- **Prefork pool: The `process inqueue damaged` error message now includes
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+ the original exception raised.
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+
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+- **Documentation**: Includes improvements by:
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+
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+ - Jeff Widman.
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+
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.. _version-3.1.20:
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3.1.20
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Ask Solem