* fix(targets): make persistent queue store crash-safe and replay lifecycle correct
Harden the target notification persistent queue (store.rs) and the replay
worker lifecycle (runtime) against data loss, silent truncation, ordering
drift, orphaned tasks, and a few low-risk robustness gaps.
store.rs
- Atomic, durable writes: write to a per-key temp file, fsync (sync_all),
then rename into place; best-effort parent-dir fsync. A crash mid-write
can no longer lose an acknowledged event or leave a half-written payload
that reads as a valid entry.
- open() now removes leftover .tmp residue and zero-byte files, and only
indexes files matching the queue extension, so ghosts/foreign files are
never replayed.
- FIFO ordering is derived from time-ordered UUIDv7 entry names instead of
coarse, clock-dependent file mtimes, so replay order is stable and
identical after a restart.
- Clamp HashMap/Vec pre-allocation derived from untrusted inputs
(entry_limit, batch item_count) to avoid capacity-overflow panics / giant
allocations.
target/mod.rs
- QueuedPayload::decode validates body length against the recorded
payload_len, rejecting torn/truncated writes instead of delivering a
silently truncated body.
- send_from_store purges a NotFound/empty entry (index + file) instead of
skipping it, so it cannot occupy a queue slot and be replayed forever.
- sanitize_queue_dir_component appends a stable hash suffix when the id was
lossy, so distinct target ids can no longer collapse onto the same queue
directory; path-safe ids are unchanged (no migration).
runtime
- Replay backoff, idle waits, and inter-scan pauses are now cancel-aware, so
reload/shutdown is not blocked for the full retry delay.
- ReplayWorkerManager::stop_all signals cancellation and then awaits each
worker's exit (bounded, with abort fallback), preventing orphaned tasks
and overlapping drain of the same store.
- Fix the always-true replay flush condition so batching is real
(size/timeout based, one semaphore permit per batch) rather than one
permit per entry; dedup keys already pending in the batch.
- clear_and_close aggregates and reports per-target close failures instead
of swallowing them; explicit shutdown surfaces them.
Relates to rustfs/backlog#966
Relates to rustfs/backlog#967
Relates to rustfs/backlog#975
Relates to rustfs/backlog#970
Relates to rustfs/backlog#983
Co-Authored-By: heihutu <heihutu@gmail.com>
* style(targets): apply rustfmt to replay batch dedup guard
Fixes the Quick Checks rustfmt failure on the multi-line `.iter().any(...)`
closure in the replay batch dedup guard.
Co-Authored-By: heihutu <heihutu@gmail.com>
---------
Co-authored-by: heihutu <heihutu@gmail.com>
houseme