aho135 commented on code in PR #19477:
URL: https://github.com/apache/druid/pull/19477#discussion_r3278678169
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docs/api-reference/supervisor-api.md:
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@@ -3539,6 +3539,101 @@ when the supervisor's tasks restart, they resume
reading from `{"0": 100, "1": 1
```
</details>
+### Reset offsets and start a backfill supervisor
+
+Resets the supervisor to the latest available stream offsets and starts a new
bounded backfill supervisor to ingest the data in the skipped range.
+
+This endpoint is useful when a supervisor has fallen behind and you want to
catch it up to the latest offsets without losing the skipped data. The main
supervisor resumes ingesting from the latest offsets, while the backfill
supervisor processes the range from the previously checkpointed offsets up to
the latest offsets at the time of the reset.
+
+The following requirements must be met before calling this endpoint:
+
+- The supervisor must be a `SeekableStreamSupervisor`.
+- The supervisor's `useEarliestSequenceNumber` property must be `false`.
Review Comment:
Yeah this is still a requirement even with separate supervisors. This is
essentially multi-supervisor support which requires useConcurrentLocks, as the
two supervisors can be writing to the same interval
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