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Chris LuandDevin
dfd9ecab05
* pb: checkpoint metadata-log replay progress per settled entry A chunk-mode subscriber's resume cursor only advanced after the whole LogFileRefs batch drained, so a stream dropped mid-replay resubscribed from the original stale position and re-read the same log files while live traffic kept appending - under a flapping filer the replay window never shrank, and each reconnect re-listed and re-fetched the same backlog. ReadLogFileRefs now reports every entry the merge has settled - delivered or filter-skipped - and FollowMetadata checkpoints StartTsNs on it, so a reconnect resumes where the previous stream stopped and the backlog drains across restarts. The peer aggregator wires the same progress into its resubscribe/offset position. * pb: emit a replay checkpoint only after the merge passes its timestamp Checkpointing an entry's timestamp the moment it settles could strand a same-timestamp entry still queued on another filer's stream: resuming is exclusive, so a reconnect would skip the unsettled half of the tie. The merge now emits a timestamp only once a later entry proves every tied entry was delivered (and once at clean EOF). * pb+filer: never regress the replay cursor below the settled checkpoint The drain's final assignment took the last settled entry's own timestamp, which can lag the log position progressFn just checkpointed - a skewed or legacy entry rewinds option.StartTsNs (and the peer's lastTsNs), so the next drain or a resubscribe re-reads the settled prefix. Guard both assignments so the cursor only moves forward. * pb: cover the resubscribe path of replay checkpoints A drain that aborts mid-replay leaves StartTsNs at the last checkpoint the merge passed, and the next subscribe resumes there instead of re-reading the whole ref set. The test drives the real makeSubscribeMetadataFunc path: refs, a mid-batch apply failure, then a resubscribe whose SinceNs must carry the checkpoint. * pb: emit the tail replay checkpoint only for a settled timestamp Generated with [Devin](https://devin.ai) Co-Authored-By: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com> --------- Co-authored-by: Devin <158243242+devin-ai-integration[bot]@users.noreply.github.com>