Bump kombu from 5.3.7 to 5.6.0

[dependabot]

Bumps kombu from 5.3.7 to 5.6.0.

Release notes

Sourced from kombu's releases.

v5.6.0

Key Highlights

QoS Max Prefetch Limit celery/kombu#2348

Prevent Out Of Memory crashes when queues flood with ETA/countdown tasks. The new optional max_prefetch parameter caps how many messages workers hold in memory. Defaults to unlimited (None) to preserve existing behavior.

from kombu.common import QoS
Limit prefetch to maximum 100 messages
qos = QoS(callback=consumer.qos, initial_value=10, max_prefetch=100)

Redis Polling Interval Support celery/kombu#2346

Fix Redis transport to properly propagate polling_interval and brpop_timeout from transport_options to the Channel's _brpop_start timeout.

app.conf.broker_transport_options = {"polling_interval": 10}

Leave it unset to keep the familiar 1-second default, or raise it to slow down idle polling.

Pidbox RabbitMQ 4.x Compatibility celery/kombu#2338

Let pidbox queues work on RabbitMQ 4.x brokers that reject transient, non-exclusive queues.

MongoDB Transport Improvements celery/kombu#2347

URI options now come through lowercase and flattened again, so settings like replicaSet=test_rs show up as options['replicaset'].

Resource Pool Gevent Compatibility celery/kombu#2314

Restore compatibility with recent gevent releases that monkey-patch the standard library queue.

Timezone-aware UTC Timestamps celery/kombu#2355

Replace every usage of datetime.utcnow() with datetime.now(timezone.utc) to return timezone-aware UTC datetimes.

Redis Client Name Support celery/kombu#2367

Support for propagating the client_name connection parameter through the Redis transport (including Sentinel) so that connections appear with meaningful names in monitoring tools.

What's Changed

Since v5.6.0rc2

• Test on Python 3.14 by @​cclauss in celery/kombu#2361
• Revert "Revert "Bump pymongo from 4.10.1 to 4.15.3"" by @​auvipy in celery/kombu#2401
• Prepare for release: v5.6.0 by @​Nusnus in celery/kombu#2402

... (truncated)

Changelog

Sourced from kombu's changelog.

5.6.0

:release-date: 1 November, 2025 :release-by: Tomer Nosrati

Key Highlights

QoS Max Prefetch Limit
----------------------
PR [#2348](https://github.com/celery/kombu/issues/2348) <https://github.com/celery/kombu/pull/2348>_
Prevent Out Of Memory crashes when queues flood with ETA/countdown tasks. The new optional max_prefetch parameter caps how many messages workers hold in memory. Defaults to unlimited (None) to preserve existing behavior.
.. code-block:: python
from kombu.common import QoS
Limit prefetch to maximum 100 messages
qos = QoS(callback=consumer.qos, initial_value=10, max_prefetch=100)


Redis Polling Interval Support
PR [#2346](https://github.com/celery/kombu/issues/2346) <https://github.com/celery/kombu/pull/2346>_
Fix Redis transport to properly propagate polling_interval and brpop_timeout from transport_options to the Channel's _brpop_start timeout.
.. code-block:: python
app.conf.broker_transport_options = {"polling_interval": 10}

Leave it unset to keep the familiar 1-second default, or raise it to slow down idle polling.
Pidbox RabbitMQ 4.x Compatibility
PR [#2338](https://github.com/celery/kombu/issues/2338) <https://github.com/celery/kombu/pull/2338>_
Let pidbox queues work on RabbitMQ 4.x brokers that reject transient, non-exclusive queues.
MongoDB Transport Improvements
PR [#2347](https://github.com/celery/kombu/issues/2347) <https://github.com/celery/kombu/pull/2347>_
URI options now come through lowercase and flattened again, so settings like replicaSet=test_rs show up as options['replicaset'].
Resource Pool Gevent Compatibility
</tr></table>

... (truncated)

Commits

• 4e74395 Prepare for release: v5.6.0 (#2402)
• 1c5978e Revert "Revert "Bump pymongo from 4.10.1 to 4.15.3 (#2376)" (#2384)" (#2401)
• b8cf1f6 Test on Python 3.14 and 3.14t (#2361)
• 1bef093 Prepare for (pre) release: v5.6.0rc2 (#2396)
• f86523c Fix comment grammar in entity_name test (#2394)
• 9f2a840 Remove Qpid transport from requirements of func test (#2393)
• 1d47117 Update qpid-python and qpid-tools versions (#2392)
• f5e8790 Update requirements to remove backports.zoneinfo (#2391)
• 9111baf [pre-commit.ci] pre-commit autoupdate (#2235)
• ab83832 Bump msgpack from 1.1.0 to 1.1.2 (#2385)
• Additional commits viewable in compare view

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