PrefectHQ/prefect 3.9.2

3.9.2 - It’s okay to let go of a lock that already let go of you

on GitHub

3.9.2 - It’s okay to let go of a lock that already let go of you

Released on November 06, 2026

Enhancements ➕➕

• Reduce deployment writes from queue polling by @chuqCTC in #23130

Bug Fixes 🐞

• Render list-of-lists table artifacts in ArtifactDataView by @devin-ai-integration[bot] in #23359
• Preserve datetime instants when changing timezone by @ashutosh8021 in #23682
• Show an invalid name error from prefect deployment commands for malformed names by @LuisFigueroaG in #23680
• Fix [object Object] displayed in parameters fields by @uinstinct in #23723
• Align positional-only argument defaults in source-parsed signatures by @udsy19 in #23428
• Preserve init=False dataclass fields in visit_collection by @Kayvan-Zahiri in #23270
• Release async-acquired locks in RedisLockManager.release_lock by @devin-ai-integration[bot] in #23654
• Keep recent runs visible in V2 deployment activity charts by @devin-ai-integration[bot] in #23640
• Drop task run events for missing flow runs instead of failing the batch by @devin-ai-integration[bot] in #23664
• Don't crash completed runs when lease renewal gets 410 after terminal state by @devin-ai-integration[bot] in #23659
• Replace stuck readiness tasks when a poll would mark something ready by @devin-ai-integration[bot] in #23644
• Return 422 instead of 503/500 for invalid values in request bodies by @devin-ai-integration[bot] in #23619
• Preserve literal artifact content in CLI JSON output by @RoryGlenn in #23692
• Preserve literal markup and emoji aliases in all CLI JSON/YAML output by @devin-ai-integration[bot] in #23695
• Fix v1 UI ignoring PREFECT_SERVER_UI_SHOW_PROMOTIONAL_CONTENT by @devin-ai-integration[bot] in #23710
• Accept the same flow state hook signatures in the engine and the runner by @CassianoE in #23715
• Keep deployment schedule parameter overrides on partial schedule updates by @devin-ai-integration[bot] in #23719
• Tolerate release of expired locks in MemoryLockManager and FileSystemLockManager by @Wilson0511 in #23725
• Keep inherited sync client open for tasks submitted via ThreadPoolTaskRunner by @devin-ai-integration[bot] in #23749
• Fall back to UTC when the browser reports no time zone in ui-v2 by @devin-ai-integration[bot] in #23738
• Fix GitRepository.pull_code() ignoring directories changes on an existing sparse checkout by @CassianoE in #23712
• Preserve JSON Schema references in flow parameters by @ska2704 in #23432
• Disable Rich markup by default in exit_with_error by @devin-ai-integration[bot] in #23763
• Fix IndexError in prefect block type inspect/ls on empty description by @devin-ai-integration[bot] in #23762
• Fix 500 from flow run resume when run input has an integer beyond 64 bits by @devin-ai-integration[bot] in #23617
• Treat database and connection pool timeouts as client retryable exceptions by @Tyagiquamar in #23741
• Stop flow run heartbeats before proposing a terminal state by @chrisguidry in #23784
• Fix automation trigger "Format" button submitting the wizard form by @devin-ai-integration[bot] in #23776
• Return False from still_connected after a websocket disconnect message by @chuqCTC in #23781
• Fix RemoteFileSystem uploading all files when ignore file excludes everything by @devin-ai-integration[bot] in #23786
• Log pull step failures to the API in the workspace resolver by @devin-ai-integration[bot] in #23783
• Remove a failed script from sys.modules in load_script_as_module by @devin-ai-integration[bot] in #23772
• Surface import errors when the placeholder flow fallback cannot find a non-def entrypoint by @devin-ai-integration[bot] in #23773
• Fix visit_collection for defaultdict, Counter, deque, and frozenset by @devin-ai-integration[bot] in #23794
• Keep automations loaded while the triggers service reloads them by @devin-ai-integration[bot] in #23778
• Let * match an empty string in prefect deploy --name patterns by @devin-ai-integration[bot] in #23771
• Skip locked rows when sweeping held events by @chuqCTC in #23757

Integrations & Dependencies 🤝

• Bump pyasn1 from 0.6.4 to 0.6.5 by @dependabot[bot] in #23708
• Bump follow-redirects from 1.16.1 to 1.16.2 in /ui by @dependabot[bot] in #23707
• Bump @vitest/mocker and vitest in /ui by @dependabot[bot] in #23717
• Bump pydocket to >=0.27.2 by @chrisguidry in #23729
• Bump oauthlib from 4.0.0 to 4.0.1 by @dependabot[bot] in #23787

Development & Tidiness 🧹

• Fix flaky test_results_with_timeout racing a 10ms SIGALRM by @devin-ai-integration[bot] in #23423
• Fix flaky server signal forwarding tests by using OS-assigned ports by @devin-ai-integration[bot] in #23716
• Fix flaky FlowRunCard test by trimming generated flow run names in ui-v2 mocks by @devin-ai-integration[bot] in #23713
• Stop credential-obfuscation git clone tests from hitting GitHub by @devin-ai-integration[bot] in #23660
• Add coverage and protocol docs for releasing expired locks by @devin-ai-integration[bot] in #23726
• Drop two asserts that cannot run inside pytest.raises blocks by @dylanpulver in #23760
• Tidy up GitHub Actions workflows by @gaker in #23761

Documentation 📓

• Send referrers on outbound links and add missing page descriptions by @madureira-gabriel in #23728
• Note init=False dataclass fields keep resolved values in tasks by @devin-ai-integration[bot] in #23764
• Document reserved event name prefixes by @bunchesofdonald in #23795

Full Changelog: 3.9.1...3.9.2