lancedb-gatefixer[bot] e6444ecc05 fix(rust): handle missing mirrored copy sources (#3843)
## Summary

- treat `NotFound` from the mirrored secondary copy as a cache miss
while preserving every other secondary error
- perform the durable primary copy after either a successful secondary
copy or a secondary cache miss
- cover both an initially missing secondary manifest and eviction
immediately before the secondary copy

## Root cause

Readers can use process-local secondary stores that do not contain a
staging manifest written by another process, or that evict it before
finalization. `MirroringObjectStore::copy_opts` propagated that
secondary `NotFound`, so older object_store versions could loop
indefinitely and the locked version aborted before performing the
durable primary copy.

## Validation

- `cargo fmt --all -- --check`
- `cargo test --quiet --features remote -p lancedb
io::object_store::test::test_copy_when -- --nocapture`
- `cargo check --quiet --features remote --tests --examples`
- `cargo clippy --quiet --features remote --tests --examples`
- `cargo test --quiet --features remote --tests`

Fixes #1176

<!-- lance-gatekeeper-fix:v1 agent=636210af9dcd25b6dceadebd2fcafc6f
generation=1 -->

---------

Co-authored-by: Gatefixer <313497061+lancedb-gatefixer[bot]@users.noreply.github.com>
2026-08-06 16:49:49 +08:00
2023-03-17 18:15:19 -07:00
2025-03-10 09:01:23 -07:00

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