[v25.3.x] cluster_link: fall back to LSO when start timestamp exceeds source log#29900
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nguyen-andrew merged 2 commits intoredpanda-data:v25.3.xfrom Mar 20, 2026
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When a shadow link is configured with a start_at_timestamp past the end of the source partition's log, ListOffsets returns offset -1 with no error. Previously this value was used as-is, causing replication to start from offset 0 and copy the entire log. Extract the ListOffsets RPC dispatch into a dedicated dispatch_list_offsets helper so it can be reused, then add a check in fetch_offset_for_timestamp: when the returned offset is negative, issue a second ListOffsets request with latest_timestamp (which, under our read_committed isolation level, returns the LSO) so replication begins only at new committed data. (cherry picked from commit bffd156)
Exercises the fix that falls back to LSO when ListOffsets returns -1. Verifies that historical data is not replicated and only new records appear. (cherry picked from commit 8ffe553)
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Retry command for Build#82105please wait until all jobs are finished before running the slash command |
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CI test resultstest results on build#82105
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nguyen-andrew
approved these changes
Mar 20, 2026
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Backport of PR #29861