2 Commits

Author	SHA1	Message	Date
Kpa-clawbot	2460e33f94	fix(#810): /health.recentPackets resolved_path falls back to longest sibling obs (#821) ... ## What + why `fetchResolvedPathForTxBest` (used by every API path that fills the top-level `resolved_path`, including `/api/nodes/{pk}/health.recentPackets`) picked the observation with the longest `path_json` and queried SQL for that single obs ID. When the longest-path obs had `resolved_path` NULL but a shorter sibling had one, the helper returned nil and the top-level field was dropped — even though the data exists. QA #809 §2.1 caught it on the health endpoint because that page surfaces it per-tx. Fix: keep the LRU-friendly fast path (try the longest-path obs), then fall back to scanning all observations of the tx and picking the longest `path_json` that actually has a stored `resolved_path`. ## Changes - `cmd/server/resolved_index.go`: extend `fetchResolvedPathForTxBest` with a fallback through `fetchResolvedPathsForTx`. - `cmd/server/issue810_repro_test.go`: regression test — seeds a tx whose longest-path obs lacks `resolved_path` and a shorter sibling has it, then asserts `/api/packets` and `/api/nodes/{pk}/health.recentPackets` agree. ## Tests `go test ./... -count=1` from `cmd/server` — PASS (full suite, ~19s). ## Perf Fast path unchanged (single LRU/SQL lookup, dominant case). Fallback only runs when the longest-path obs has NULL `resolved_path` — one indexed query per affected tx, bounded by observations-per-tx (small). Closes #810 --------- Co-authored-by: you <you@example.com>	2026-04-21 04:51:24 +00:00
Kpa-clawbot	9e90548637	perf(#800): remove per-StoreTx ResolvedPath, replace with membership index + on-demand decode (#806) ... ## Summary Remove `ResolvedPath []*string` field from `StoreTx` and `StoreObs` structs, replacing it with a compact membership index + on-demand SQL decode. This eliminates the dominant heap cost identified in profiling (#791, #799). **Spec:** #800 (consolidated from two rounds of expert + implementer review on #799) Closes #800 Closes #791 ## Design ### Removed - `StoreTx.ResolvedPath []*string` - `StoreObs.ResolvedPath []*string` - `TransmissionResp.ResolvedPath`, `ObservationResp.ResolvedPath` struct fields ### Added | Structure | Purpose | Est. cost at 1M obs | |---|---|---:| | `resolvedPubkeyIndex map[uint64][]int` | FNV-1a(pubkey) → []txID forward index | 50–120 MB | | `resolvedPubkeyReverse map[int][]uint64` | txID → []hashes for clean removal | ~40 MB | | `apiResolvedPathLRU` (10K entries) | FIFO cache for on-demand API decode | ~2 MB | ### Decode-window discipline `resolved_path` JSON decoded once per packet. Consumers fed in order, temp slice dropped — never stored on struct: 1. `addToByNode` — relay node indexing 2. `touchRelayLastSeen` — relay liveness DB updates 3. `byPathHop` resolved-key entries 4. `resolvedPubkeyIndex` + reverse insert 5. WebSocket broadcast map (raw JSON bytes) 6. Persist batch (raw JSON bytes for SQL UPDATE) ### Collision safety When the forward index returns candidates, a batched SQL query confirms exact pubkey presence using `LIKE '%"pubkey"%'` on the `resolved_path` column. ### Feature flag `useResolvedPathIndex` (default `true`). Off-path is conservative: all candidates kept, index not consulted. For one-release rollback safety. ## Files changed | File | Changes | |---|---| | `resolved_index.go` | **New** — index structures, LRU cache, on-demand SQL helpers, collision safety | | `store.go` | Remove RP fields, decode-window discipline in Load/Ingest, on-demand txToMap/obsToMap/enrichObs, eviction cleanup via SQL, memory accounting update | | `types.go` | Remove RP fields from TransmissionResp/ObservationResp | | `routes.go` | Replace `nodeInResolvedPath` with `nodeInResolvedPathViaIndex`, remove RP from mapSlice helpers | | `neighbor_persist.go` | Refactor backfill: reverse-map removal → forward+reverse insert → LRU invalidation | ## Tests added (27 new) **Unit:** - `TestStoreTx_ResolvedPathFieldAbsent` — reflection guard - `TestResolvedPubkeyIndex_BuildFromLoad` — forward+reverse consistency - `TestResolvedPubkeyIndex_HashCollision` — SQL collision safety - `TestResolvedPubkeyIndex_IngestUpdate` — maps reflect new ingests - `TestResolvedPubkeyIndex_RemoveOnEvict` — clean removal via reverse map - `TestResolvedPubkeyIndex_PerObsCoverage` — non-best obs pubkeys indexed - `TestAddToByNode_WithoutResolvedPathField` - `TestTouchRelayLastSeen_WithoutResolvedPathField` - `TestWebSocketBroadcast_IncludesResolvedPath` - `TestBackfill_InvalidatesLRU` - `TestEviction_ByNodeCleanup_OnDemandSQL` - `TestExtractResolvedPubkeys`, `TestMergeResolvedPubkeys` - `TestResolvedPubkeyHash_Deterministic` - `TestLRU_EvictionOnFull` **Endpoint:** - `TestPathsThroughNode_NilResolvedPathFallback` - `TestPacketsAPI_OnDemandResolvedPath` - `TestPacketsAPI_OnDemandResolvedPath_LRUHit` - `TestPacketsAPI_OnDemandResolvedPath_Empty` **Feature flag:** - `TestFeatureFlag_OffPath_PreservesOldBehavior` - `TestFeatureFlag_Toggle_NoStateLeak` **Concurrency:** - `TestReverseMap_NoLeakOnPartialFailure` - `TestDecodeWindow_LockHoldTimeBounded` - `TestLivePolling_LRUUnderConcurrentIngest` **Regression:** - `TestRepeaterLiveness_StillAccurate` **Benchmarks:** - `BenchmarkLoad_BeforeAfter` - `BenchmarkResolvedPubkeyIndex_Memory` - `BenchmarkPathsThroughNode_Latency` - `BenchmarkLivePolling_UnderIngest` ## Benchmark results ``` BenchmarkResolvedPubkeyIndex_Memory/pubkeys=50K 429ms 103MB 777K allocs BenchmarkResolvedPubkeyIndex_Memory/pubkeys=500K 4205ms 896MB 7.67M allocs BenchmarkLoad_BeforeAfter 65ms 20MB 202K allocs BenchmarkPathsThroughNode_Latency 3.9µs 0B 0 allocs BenchmarkLivePolling_UnderIngest 5.4µs 545B 7 allocs ``` Key: per-obs `[]*string` overhead completely eliminated. At 1M obs with 3 hops average, this saves ~72 bytes/obs × 1M = ~68 MB just from the slice headers + pointers, plus the JSON-decoded string data (~900 MB at scale per profiling). ## Design choices - **FNV-1a instead of xxhash**: stdlib availability, no external dependency. Performance is equivalent for this use case (pubkey strings are short). - **FIFO LRU instead of true LRU**: simpler implementation, adequate for the access pattern (mostly sequential obs IDs from live polling). - **Grouped packets view omits resolved_path**: cold path, not worth SQL round-trip per page render. - **Backfill pending check uses reverse-map presence** instead of per-obs field: if a tx has any indexed pubkeys, its observations are considered resolved. Closes #807 --------- Co-authored-by: you <you@example.com>	2026-04-20 19:55:00 -07:00