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Keep latest timestamp in natural-key dedup within batch Explicitly compare state_timestamp when deduplicating by natural key instead of relying on dict-overwrite order, which could select an older event when the same natural key appears across multiple task-run IDs. Co-Authored-By: alex.s@prefect.io <ajstreed1@gmail.com>

devin/1771284144-fix-task-run-recorder-upsert-constraint

14 minutes ago

Add work pool API helpers and list page E2E tests (#20695) Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> Co-authored-by: alex.s@prefect.io <ajstreed1@gmail.com>

main

23 minutes ago

Deduplicate states by (task_run_id, timestamp) before insertion After natural-key ID resolution, multiple events can share the same task_run.id. If they also share the same state timestamp (likely when two workers observe the same state transition), inserting both would violate uq_task_run_state__task_run_id_timestamp_desc. Dedup before passing to _insert_task_run_states. Co-Authored-By: alex.s@prefect.io <ajstreed1@gmail.com>

devin/1771284144-fix-task-run-recorder-upsert-constraint

33 minutes ago

Fix scheduler to check per-schedule run counts for multi-schedule deployments The scheduler's deployment selection query previously used aggregate count/max_time across ALL schedules in the HAVING clause. This meant that when a deployment had multiple schedules with different frequencies, the high-frequency schedule could be starved of runs while the low-frequency schedules kept the aggregate above the threshold. Changed _get_select_deployments_to_schedule_query to use per-schedule subqueries that check each active schedule's run count and max scheduled time independently using idempotency_key prefix matching. A deployment is now selected for re-scheduling if ANY of its active schedules has fewer than min_runs future SCHEDULED runs or insufficient time coverage. Added regression tests verifying: - Query selects deployment when one schedule's runs are exhausted - Scheduler generates new runs for starved schedules Co-Authored-By: Nate Nowack <nate@prefect.io>

devin/1771292172-fix-multi-schedule-scheduler

45 minutes ago

Handle orphan Redis pending entries in consumer (#20696) Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> Co-authored-by: alex.s@prefect.io <ajstreed1@gmail.com>

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51 minutes ago

Reject negative DateTimeDelta intervals in validation Use in_months_days_secs_nanos() to check all components are non-negative, preventing infinite loops in schedule generation from negative intervals like DateTimeDelta(hours=-1). Co-Authored-By: Nate Nowack <nate@prefect.io>

devin/1771257112-datetimedelta-interval-schedule

1 hour ago

Fix uq_task_run constraint violation with multiple background workers Use composite key (flow_run_id, task_key, dynamic_key) for ON CONFLICT instead of primary key (id) in task_run_recorder upsert paths. When multiple background workers process the same task run event via Redis consumer groups, each generates a different UUID for the same logical task run. The previous ON CONFLICT (id) didn't catch these natural key collisions, causing IntegrityError on the unique constraint. Changes: - record_task_run_event: Use composite key conflict for tasks with flow_run_id, fall back to id-based for autonomous tasks (NULL flow_run_id) - record_bulk_task_run_events: Add natural key dedup within batch, split batches by flow_run_id presence, resolve actual persisted ids after upsert for TaskRunState FK linkage - Add tests for natural key collision with different ids Co-Authored-By: alex.s@prefect.io <ajstreed1@gmail.com>

devin/1771284144-fix-task-run-recorder-upsert-constraint

3 hours ago

Add deployment detail page E2E tests (#20694) Co-authored-by: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com> Co-authored-by: alex.s@prefect.io <ajstreed1@gmail.com>

main

5 hours ago

Active Branches

Fix `uq_task_run__flow_run_id_task_key_dynamic_key` constraint violation with multiple background workers

last run

14 minutes ago

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Fix scheduler to check per-schedule run counts for multi-schedule deployments

last run

45 minutes ago

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Support `DateTimeDelta` as interval option in `IntervalSchedule`

last run

1 hour ago

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