What's Changed

• Fix Django worker recursion bug + defensive checks for pool_cls.module by @maycuatroi1 in #10048
• Docs: Update user_preload_options example to use click. by @jorsyk in #10056
• Fix invalid configuration key "bootstrap_servers" in Kafka demo by @jorsyk in #10060
• Fix broken images on PyPI page by @Timour-Ilyas in #10066
• Remove broken reference. by @sueannioanis in #10071
• Removed --dist=loadscope from smoke tests by @Nusnus in #10073
• Docs: Clarify task_retry signal args may be None by @GangEunzzang in #10076
• Update example for Django by @sbc-khacnha in #10081
• Make tests compatible with pymongo >= 4.16 by @cjwatson in #10074
• fix: source install of cassandra-driver by @Izzette in #10105
• fix: register task cross-reference role in Sphinx extension by @veeceey in #10100
• fix: avoid cycle detection in native delayed delivery by @Izzette in #10095
• fix(asynpool): avoid AttributeError when proc lacks _sentinel_poll by @mriddle in #10086
• fix dusk_astronomical horizon sign (+18 -> -18) by @Mr-Neutr0n in #10121
• Fix/10106 onupdate col use lambda func by @ChickenBenny in #10108
• Fix warm shutdown RuntimeError with eventlet>=0.37.0 (#10083) by @ChickenBenny in #10123
• Fix 10109 db backend connection health by @ChickenBenny in #10124
• Database Backend filter unsupport sql engine arguments with nullpool #7355 by @ChickenBenny in #10134
• fix(beat): correct argument order in Service.reduce by @bysiber in #10137
• ci: declare explicit read-only token permissions in workflow jobs by @Rohan5commit in #10139
• chore: 'boto3to' to 'boto3 to' by @cuiweixie in #10133
• Database Backend: Add missing index on date_done (Fixes #10097) by @ChickenBenny in #10098
• docs: fix typo in CONTRIBUTING.rst by @Rohan5commit in #10141
• Refer to Flower / Prometheus for monitoring by @WilliamDEdwards in #10140
• docs: remove duplicated words in broker and routing docs by @Rohan5commit in #10146
• docs: fix stale version reference and grammar in README by @kelsonbrito50 in #10145
• docs: fix wording in Celery 5.3 worker pool notes by @Rohan5commit in #10149
• docs: fix duplicated wording in 3.1 changelog entry by @Rohan5commit in #10152
• docs: fix changelog typo in context manager wording by @Rohan5commit in #10144
• Fix/10096 worker fails to reconnect after redis failover by @ChickenBenny in #10151
• Improve on_after_finalize signal documentation by @Br1an67 in #10155
• Add non-commutative example to clarify partial arg ordering in canvas docs by @Br1an67 in #10157
• Remove redundant test_isa_mapping test (fixes #10077) by @daniel7an in #10103
• Upgrade pytest-celery to >=1.3.0 and adopt PYTEST_CELERY_PKG build arg by @Nusnus in #10162
• Remove deprecated args from redis get_connection call by @JaeHyuckSa in #10036
• Fix #6912 rpc backend reconnection error by @ChickenBenny in #10179
• Fix NameError with TYPE_CHECKING annotations on Python 3.14+ (PEP 649) by @drichardson in #10165
• docs: Add elaboration on prefetch multiplier settings (worker_prefetch_multiplier) and worker_eta_task_limit by @tsangwailam in #10181
• Fix O(K²) message bloat in a chain of chords by @Borzik in #10171
• Fix mock connection interfaces to prevent TypeError during exception handling by @ChickenBenny in #10178
• fix(trace): dispatch chain/callbacks on dedup fast-path for redelivered tasks by @aurangzaib048 in #10159
• Extract reconnect_on_error to BaseResultConsumer by @ChickenBenny in #10189
• pep 649 by @ericbuehl in #10187
• Fix#9722 friendly status errors for CLI by @ChickenBenny in #10190
• docs: clarify after_return behavior for retried tasks by @KianAnbarestani in #10192
• Add compression header to message protocol docs by @Br1an67 in #10156
• docs: fix duplicated word in bootsteps comment by @Rohan5commit in #10153
• Remove outdated autoreloader section from extending docs by @Br1an67 in #10154
• Fix: prioritize request ignore_result over task definition by @patri27826 in #10184
• fix: clear the timer while catch the exception by @ChickenBenny in #10218
• Prepare for release: v5.6.3 by @Nusnus in #10221

New Contributors

• @maycuatroi1 made their first contribution in #10048
• @jorsyk made their first contribution in #10056
• @Timour-Ilyas made their first contribution in #10066
• @sueannioanis made their first contribution in #10071
• @GangEunzzang made their first contribution in #10076
• @sbc-khacnha made their first contribution in #10081
• @veeceey made their first contribution in #10100
• @mriddle made their first contribution in #10086
• @Mr-Neutr0n made their first contribution in #10121
• @ChickenBenny made their first contribution in #10108
• @bysiber made their first contribution in #10137
• @Rohan5commit made their first contribution in #10139
• @cuiweixie made their first contribution in #10133
• @kelsonbrito50 made their first contribution in #10145
• @Br1an67 made their first contribution in #10155
• @daniel7an made their first contribution in #10103
• @drichardson made their first contribution in #10165
• @tsangwailam made their first contribution in #10181
• @Borzik made their first contribution in #10171
• @aurangzaib048 made their first contribution in #10159
• @ericbuehl made their first contribution in #10187
• @KianAnbarestani made their first contribution in #10192
• @patri27826 made their first contribution in #10184

Full Changelog: v5.6.2...v5.6.3