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Preserve unresolved list items in `apply_values` when `remove_notset=False` Fixes templated step-output tags (e.g. `{{ get-commit-hash.stdout }}`) being dropped from deployment tags by the early env-var templating pass in `prefect deploy`. (OSS-8325) Co-authored-by: Alex Streed <desertaxle@users.noreply.github.com>

devin/1791753327-preserve-templated-list-items

4 hours ago

Default concurrency lease storage to the filesystem The default memory lease storage loses every lease when the server restarts, while the slots those leases hold stay counted in the database. Nothing can release them afterwards: the repossessor finds no expired lease and the holder's own release finds no lease, so each restart permanently removes the capacity held at that moment. The filesystem storage keeps leases under PREFECT_HOME, so they survive a restart and expire normally. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01229pDfZpTBKHBc1sSaAbLb

default-filesystem-lease-storage

7 hours ago

Timestamp a proposed flow run state after the transition it waits on `POST /flow_runs/{id}/set_state` stamped the proposed state with the current time before taking the run's row lock. When two transitions overlap, the one that waits can carry the earlier timestamp, so it sorts before the state it replaced and the history ends in a state the run is not in. Take the lock first, then build the state. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01229pDfZpTBKHBc1sSaAbLb

fix-state-timestamp-order

7 hours ago

Release a concurrency lease's slots once when it is released concurrently `decrement-with-lease` and the repossessor read a lease, decrement its limits, then revoke it. Two overlapping releases of the same lease (a client retrying after a timeout, or the holder racing the repossessor) both read it before either revokes it, so both decrement and the second frees a slot that belongs to another holder. `revoke_lease` now reports whether the call removed the lease, and both paths revoke first and decrement only when they were the one to remove it. Storage that returns None is treated as before. Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com> Claude-Session: https://claude.ai/code/session_01229pDfZpTBKHBc1sSaAbLb

fix-concurrent-lease-release

7 hours ago

Sync and retry submodule updates on every pull When submodules are enabled, an existing checkout pinned to a commit_sha now runs the submodule step on every pull, even when the commit is already checked out, so an update that failed on an earlier pull is retried. The step runs `git submodule sync --recursive` before `git submodule update --init --recursive` so URL changes in `.gitmodules` are picked up.

digit50:fix/git-storage-pinned-commit-checkout

16 hours ago

Restore the worker environment after each process pool task `_run_task_in_subprocess` applied each submit's environment snapshot on top of the worker's existing environment, so a reused worker process kept variables set by earlier tasks. The worker environment is now restored after every task, so each task sees only its own snapshot.

digit50:fix/process-pool-runner-context-per-submit

16 hours ago

Update submodules when checking out a new commit_sha With `include_submodules=True`, an existing checkout that moves to a new `commit_sha` only ran `git checkout`, leaving submodule working trees at the previous pin. It now runs `git submodule update --init --recursive` after the checkout, matching the `--recurse-submodules` used by the clone and pull paths.

digit50:fix/git-storage-pinned-commit-checkout

18 hours ago

Restore the worker environment after each process pool task `_run_task_in_subprocess` applied each submit's environment snapshot on top of the worker's existing environment, so a reused worker process kept variables set by earlier tasks. The worker environment is now restored after every task, so each task sees only its own snapshot.

digit50:fix/process-pool-runner-context-per-submit

18 hours ago

Latest Branches

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Preserve templated step-output items in deployment tag lists#23391

4 hours ago

f653bb2

devin/1791753327-preserve-templated-list-items

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Default concurrency lease storage to the filesystem so leases survive a restart#23389

7 hours ago

0d64894

default-filesystem-lease-storage

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Timestamp a proposed flow run state after the transition it waits on#23385

7 hours ago

92d6f95

fix-state-timestamp-order

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