ship/replica: delete untested legacy restore fallback, close #618's mutation-verified test gaps - #638
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…s mutation-verified test gaps Deletes src/ship/restore.rs's listing-driven pre-manifest restore fallback (list_names_under, parse_segment_name, and the branch that used them): every generation any current writer ships carries a manifest, so the fallback was reachable only by manually rewinding a generation's complete marker to its pre-#128 empty shape — a real test did this, but only as a vehicle to pin the listing-based reconstruction logic itself, not because pre-manifest buckets are a supported input today. restore_into now refuses such a generation outright with a clear message; the http_api test that forced the old path now pins the refusal instead. Runs cargo mutants --file per #618's remaining ship/replica modules (shipper.rs, naming.rs, restore.rs, config.rs, handle.rs, progress.rs, replica.rs, registry/replication.rs) for ground truth in place of the audit's now-stale line numbers, then either adds a test that kills each missed mutant or documents why it's provably equivalent / requires non-deterministic timing no test can pin (matching the project's existing #604 and registry/boot.rs precedents for each). Notably: the panic-payload and generation-switch fixes already in #634 corrected two real bugs the original audit's line numbers no longer matched; this pass found the audit's "zero test coverage" claim about the legacy restore path was itself wrong (a real test existed), which is why that path's deletion doubles as resolving #619 item 2. Claude-Session: https://claude.ai/code/session_01KGdCCEPLGcimWQtAcAAXqZ
…unpinnable TOCTOU guards newest_fence's and ReplicateConfig::from_env's `<` vs `<=` boundary mutants compute the identical observable output for every input (explained inline and here). Two of ship_lane's three identical vanished_mid_cycle call sites (shipper.rs:426, :459) have no `.await` between ship_lane's own entry and reaching them, so nothing on a single-threaded executor can land a test in that window — unlike the third (:390), which a real test now pins by racing an earlier scan.changed upload. Claude-Session: https://claude.ai/code/session_01KGdCCEPLGcimWQtAcAAXqZ
The false arm at :390 is real-tested; the true arm needs a non-NotFound local fs error at that exact point, which this suite has no fault-injection wrapper for without breaking the same pausing mechanism the working test relies on. Claude-Session: https://claude.ai/code/session_01KGdCCEPLGcimWQtAcAAXqZ
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📝 WalkthroughWalkthroughChangesレプリケーション検証
Estimated code review effort: 3 (Moderate) | ~25 minutes Merge Risk: 🟡 Moderate · up to This change removes a legacy restore path and expands replication coverage, but the current version can produce incorrect restored data for a malformed manifest and contains test-safety and validation gaps that may hide regressions or hang CI. These bounded correctness and merge-readiness issues should be fixed before merging. Possibly related issues
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Actionable comments posted: 7
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In `@src/registry/replication.rs`:
- Around line 550-576:
再登録の検証では、最初のlookup("sake")結果のArc<Entry>を保存し、replica_register後に同じエントリを返すことをArc::ptr_eqで確認してください。a_replica_register_ignores_an_undecodable_stemではgroup_pageの長さではなく、replica_registerが管理するコンテキストレジストリの登録状態を操作前後で直接比較し、不正なstemで変更されないことを検証してください。
In `@src/replica.rs`:
- Around line 953-959: poll_once 後の assertion を、refusal が単に “none known”
を含まないことではなく、フェンス保持者を示す “claimed by”
と期待される保持者値の両方を含むことを検証するよう更新してください。tailer.info.refusal() を対象にし、既存の poll_once と
refusal の確認範囲は維持してください。
In `@src/ship.rs`:
- Around line 234-284: Replace the process-global environment mutation in
ScopedReplicateEnv with child-process isolation or non-mutating input injection.
Do not rely on REPLICATE_ENV_LOCK, since it does not synchronize with
AZURE_ENV_LOCK or protect ReplicateConfig::from_env reads performed outside the
lock; ensure the affected tests remain parallel-safe without calling set_var or
remove_var.
In `@src/ship/restore.rs`:
- Around line 257-282: Before restoring entries in the manifest, detect names
present in both manifest.files and manifest.lanes and return an io::Error with
InvalidData for any collision. Add this validation in the restore flow before
either loop writes output, preserving the existing file and lane restoration
behavior for non-conflicting names.
In `@src/ship/shipper.rs`:
- Around line 576-579: Remove the mutation skip from vanished_mid_cycle and
retain coverage for its NotFound behavior. Add a boundary test for
update_pending_since confirming local_seq equal to shipped_seq does not set
pending_since. For newest_seq, restrict any mutation skip justification to the
unobservable no-newline JSON case, since ship_lane supplies only complete lines
or torn tails.
In `@src/ship/tests.rs`:
- Around line 1345-1374: Extend
a_claim_carries_hydrated_from_forward_only_for_the_same_bucket_url to also seed
an existing ReplicationRecord with a different url, invoke claimed, and assert
that the resulting hydrated_from is None. Preserve the existing same-URL
assertion so both branches of the record.url == url condition are covered.
- Around line 635-637: テスト内の両方の started.notified().await を、後続の待機と同じ5秒の
tokio::time::timeout で囲み、タイムアウト時に明確なテスト失敗となるよう更新してください。通常の通知後の処理は維持し、対象の
put_opts が呼ばれない場合に無期限待機しないようにします。
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📒 Files selected for processing (10)
.cargo/mutants.tomlsrc/registry/replication.rssrc/replica.rssrc/ship.rssrc/ship/config.rssrc/ship/naming.rssrc/ship/restore.rssrc/ship/shipper.rssrc/ship/tests.rstests/http_api/replication.rs
- Replace ScopedReplicateEnv's process-global env mutation with pure dependency injection (ReplicateConfig::from_values): set_var/remove_var require, under Rust's own safety contract, that no other thread reads or writes ANY env var while the call runs — a lock scoped to two keys cannot provide that against unrelated concurrently-running tests. The four from_env_* tests now call from_values directly with no real env mutation at all. - Refuse a manifest naming the same entry as both a file and a lane in restore_into — the lane's write_atomic would otherwise silently clobber the file's already-restored bytes (or vice versa, depending on HashMap iteration order), landing a directory that does not match the manifest. Never produced by a real shipper; bucket rot or tampering, the same posture safe_manifest_name already covers. - Remove #[mutants::skip] from vanished_mid_cycle (already reachable through the existing :390 test) and from newest_seq/update_pending_since, making both pub(super) so ship::tests can pin them directly instead of arguing their unreachability by analysis alone. - Strengthen two assertions that passed under a broken implementation: replica_register's idempotence check now compares Arc::ptr_eq instead of a bare lookup().is_some() (which a REPLACED entry also satisfies), and the first-poll fence resolution test now checks for the actual "claimed by <holder>" text instead of only the absence of "none known" (which a resolved-to-None holder also satisfies). Along the way, fixed a_replica_register_ignores_an_undecodable_stem's own premise: its original input had no '%' escape at all, so name_from_stem decoded it fine and the entry WAS registered — the assertion just didn't notice because it checked group_page (a different subsystem) instead of the registry replica_register actually writes into. - Extend a_claim_carries_hydrated_from_forward_only_for_the_same_bucket_url to also cover the different-URL branch (hydrated_from must NOT carry forward), the half the original test left unpinned. - Add tokio::time::timeout around two `Notify` waits that would otherwise hang the whole suite indefinitely on a regression. Claude-Session: https://claude.ai/code/session_01KGdCCEPLGcimWQtAcAAXqZ
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Addressed all 7 CodeRabbit findings in f1e2c6a:
All 7 review threads replied to and resolved. |
Mutants diff: 1 of 19 mutants missedEach line is a code change no test noticed. Add a test that |
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Summary
src/ship/restore.rs's listing-driven pre-manifest restore fallback (list_names_under,parse_segment_name, and the branch that used them): every generation any current writer ships carries a manifest, so this path was reachable only by manually rewinding a generation'scompletemarker to its pre-Boot from the bucket: restore-on-start with pinned-first lazy hydration — the volume becomes a cache #128 empty shape.restore_intonow refuses such a generation outright with a clear message. This also resolves ship/replica: 重複コード・doc陳腐化・簡素化候補 #619 item 2.a_hard_killed_writers_bucket_restores_the_shipped_wal_tail) forced this exact path — the ship/replica: 未検証分岐(shipper/restore/replicaの主要分岐にテストが無い) #618 audit's "structurally zero test coverage" claim for it was itself incorrect. That test now pins the new refusal instead (a_pre_manifest_generation_is_refused_not_silently_restored).cargo mutants --fileper remaining ship/replica module (shipper.rs, naming.rs, restore.rs, config.rs, handle.rs, progress.rs, replica.rs, registry/replication.rs) for ground truth in place of the audit's stale line numbers, then either added a test that kills each missed mutant or documented why it's provably equivalent / requires non-deterministic timing no test can pin (.cargo/mutants.toml'sexclude_re, matching the project's existing 検索/retrieval・semantic キャッシュ層の未検証分岐 #604 precedent).replica_register/replica_deregister,fence_holder,Shipper::claim's retry-past-a-raced-generation and same-urlhydrated_fromcarry-forward, a cycle whose only activity is a lane shipping under undrained hydration,ReplicateConfig::from_env's blank/unset/floor/fallback branches,open_store's S3/GCS recognition, restore's unrecognized-flag refusal,newest_complete_generation's non-NotFound propagation, and the fence-seen-on-first-poll gate.Test plan
cargo fmtcargo clippy --bin taguru --all-targets -- -D warningscargo test --bin taguru(1642 passed)cargo test --test http_api(503 passed)cargo mutants --in-diffgate againstorigin/main: 10 mutants, 8 caught + 2 unviable, 0 missedhttps://claude.ai/code/session_01KGdCCEPLGcimWQtAcAAXqZ
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変更
バグ修正