* filer sink: keep the gRPC status inside wrapped errors
%v stringifies the status, so a peer teardown reported as Canceled ("the
client connection is closing") reached IsTransientError as plain text and
matched nothing: the sync job failed on the first attempt and pinned the
offset. %w keeps the status reachable, so the retry runs on a fresh
connection once the target is back.
* pb: let a consumer drop the metadata stream to force a resubscribe
A MetadataProcessor job that exhausts its retries pins the processed
watermark so the event replays on the next subscribe — but nothing on the
source stream notices a target-side failure, so the replay waited for an
unrelated reconnect or a restart. The new Resubscribe channel cancels the
stream's context; the Recv loop answers it with ErrResubscribe so the
caller's retry loop resubscribes from GetResumeTsNs and replays the pinned
events in order.
* pb: stop the event retry loop once the stream context is done
RetryUntil ignores context, so a subscriber parked on a failing offset
write would keep retrying past a resubscribe signal until the sink came
back. Stop retrying when the stream is being dropped so the resubscribe
takes effect promptly.
* filer.sync: signal resubscribe when a job failure pins the offset
A job that exhausts its in-job retries leaves the event pinned behind oldestFailedTsNs, replayable only on a reconnect. Closing resubscribeCh on the first recorded failure lets the metadata follower drop the stream so the reconnect replays the pinned events instead of waiting for a process restart (#11572).
* filer.sync: wire the resubscribe signal into the follow options
filer.sync, filer.remote.sync, and the remote gateway bucket sync all run their subscription inside an outer retry loop, so ErrResubscribe resurfaces as a resubscribe from the persisted watermark.
* filer.sync: wait for in-flight jobs before signaling resubscribe
* remote sync: never resume past the saved offset when -timeAgo is set
* filer.sync: drop events that arrive after the drain signals resubscribe
* pb: interrupt the event retry backoff when the stream context ends
* filer.sync: stop admitting once a failure pins, and count jobs per timestamp
A pinned watermark only released once the processor went fully quiet, so a busy stream could starve the resubscribe — the failed event would wait for an unrelated reconnect anyway, the wait this mechanism exists to remove. The processor now latches stopped when a job fails: admission drops new events (they replay from the pinned watermark after the reconnect), a broadcast releases blocked waiters, and the resubscribe signals as soon as the jobs already in flight drain. A redelivery of an event still in the failure ledger may still run so its success shrinks the replay, but nothing starts once the signal has fired, or it would race the replay it asked for.
Dropped events no longer inflate the received counters — an event counts only once admitted, and the replay's own admission counts it.
While here: activeJobs keyed by TsNs collapsed events sharing a timestamp, so one completion could empty the map while a same-ts sibling was still running — letting the drain gate and the watermark outrun it. Jobs are now counted per timestamp, and the drain and lazy heap cleanup go through the counts.
* filer: resume metadata subscriber from processed watermark on reconnect
* filer: take the reconnect position from GetResumeTsNs verbatim
The callback is the subscriber's durable resume point; falling back to
StartTsNs when it returns zero can resume from a cursor the log-chunk
reader advanced past still-pending work.
* filer: advance the stream cursor once a retried event recovers
RetryForeverOnError resolves the failure inside handleErr, so returning
without moving StartTsNs replays work the event already did when the
stream reconnects before the next one arrives.
* filer: let filtered-progress markers move the processed watermark
A marker means the source examined everything up to its timestamp and
skipped what did not match the subscription. With a resume callback the
marker now reaches the consumer, and AddSyncJob advances the watermark
to it once every earlier job finished and no failure pins the offset.
Idle filtered stretches no longer rescan on every reconnect, while the
guards keep the watermark behind pending or failed work.
* filer: unpin the watermark once a failed event completes
oldestFailedTsNs was only ever set, so a failure that a replay later
fixed still held the resume offset, and every reconnect re-read the
same backlog. Track outstanding failures in a set and recompute the
pin when the failed event's job finally succeeds.
* filer.remote.gateway: resume bucket sync from the processed watermark
The bucket-sync subscriber runs the same MetadataProcessor queue as
filer.remote.sync; give it the same GetResumeTsNs callback so a
reconnect resumes from durably processed work, not the last seen event.
* util: treat a peer-sent gRPC Canceled as transient
A peer tearing down its end of the transport reports codes.Canceled
("the client connection is closing"), which IsTransientError used to
reject: the sync job then failed on the first try and held the offset
until a restart. Caller's own cancels are still excluded up front by
errors.Is(err, context.Canceled), so only teardown-style statuses take
the new branch.
* fix: preserve filtered progress and distinguish caller cancellation
* filer: bound the failed-event ledger past a persistent outage
A destination rejecting every event grew failedTs by one entry per source
event for the life of the processor. Past maxFailedSyncEvents the set now
collapses to a sticky pin at the smallest failure seen, so the watermark
still replays from the oldest failure while memory stays bounded; a
restart re-derives the exact set.
Also keep a resume-callback consumer's chunk-ref replay filter at the
subscribe-time position instead of option.StartTsNs, so a resubscribe does
not filter out events whose async processing is still pending.
* filer: key the failed-event ledger by event, not just timestamp
A success for one event cleared the pin recorded for a different event
that shared its TsNs, letting the watermark pass an unresolved failure.
The ledger now keys on the event's path identity, so recovery unblocks
only the event that actually failed.
---------
Co-authored-by: Chris Lu <chrislusf@users.noreply.github.com>
Co-authored-by: Chris Lu <chris.lu@gmail.com>
* fix(filer.sync): guard batched events against nil EventNotification
The server folds a backlog into one response: the first event in the
top-level fields, the rest in resp.Events, and the pipelined sender can
drain an idle heartbeat (nil EventNotification) into that tail. Only the
envelope got the freshness-signal guard, so a batched heartbeat reached
AddSyncJob and nil-derefed in IsEmpty while replaying a backlog buffered
during a peer outage.
Route every event, envelope and batched, through one handler that sends
freshness signals (nil heartbeat, empty marker) to OnIdleHeartbeat.
* fix(filer): guard MetaAggregator batched events against nil EventNotification
The peer subscription's envelope is nil-guarded but its batched tail was
not. The aggregator doesn't enable idle heartbeats today, so the server
can't fold a nil EventNotification into the batch yet, but make the two
loops consistent so it can't nil-deref if that changes.
On a read-only watched path the idle heartbeat keeps sync_offset fresh,
but a busy source filer still emits a MaxUnsyncedEvents marker after many
filtered events. The marker has a non-nil but empty EventNotification, so
the client routed it to the event path, where it advanced no real
watermark yet drove offsetFunc to republish the stale processed
watermark — regressing the gauge between heartbeats and spiking the
derived lag every time a filtered-event burst landed.
Route the empty marker through OnIdleHeartbeat like the idle heartbeat so
its fresh timestamp keeps the gauge current; it still advances the
in-stream resume cursor.
Chris Lu