fix: self-heal missing taxonomy embeddings - #133
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WalkthroughAdds configurable embedding retries, job timeouts, and taxonomy embedding reconciliation. Stores failure context and record revisions for taxonomy embeddings. Updates provider error classification and embedding worker failure recording. Adds repository queries, River reconciliation jobs, worker wiring, and periodic scheduling. Exposes transient and terminal embedding failure counts in taxonomy responses and metrics. Adds unit, integration, and API tests. Merge Risk: 🟡 Moderate · up to This PR adds automatic taxonomy-embedding repair and failure reporting, but the current implementation can leave queued repairs unprocessed when reconciliation is disabled and can exceed repair limits or issue duplicate provider calls during concurrent activity. These merge-readiness risks should be fixed or explicitly accepted before merging. 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
✅ Passed checks (4 passed)
Full details: Description checkExplanation The description provides a clear summary, incident context, safety properties, validation steps, and merge-ordering details. It does not include a specific issue reference or the template checklist, but the required change and testing information are substantially complete. Full details: Docstring CoverageExplanation Docstring coverage is 50.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 54 functions across 35 files. (4 skipped: 4 unsupported.)
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Actionable comments posted: 4
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Inline comments:
In `@cmd/worker/app.go`:
- Line 420: Update the taxonomy configuration check in the worker reconciliation
setup to require a non-empty cfg.Taxonomy.ServiceURL rather than accepting
either ServiceURL or ServiceToken. Extend TestEmbeddingReconcileConfigured with
a token-only configuration case that verifies reconciliation is not treated as
configured.
In `@internal/repository/embeddings_repository.go`:
- Around line 321-329: Add an expression index for the river_job lookup used by
the NOT EXISTS clause, covering kind, state, and
args->>'feedback_record_id' so the feedback_record_id equality is
indexable alongside the existing filters. Alternatively, rewrite those argument
predicates to use JSONB containment if that matches the project’s indexing
conventions.
In `@internal/workers/feedback_embedding.go`:
- Around line 214-217: In handleEmbedError, gate
failureMetrics.RecordTerminalFailure with inputKind ==
models.EmbeddingInputKindTaxonomyTranslated so raw embedding terminal errors are
excluded; add a regression test confirming raw jobs do not record taxonomy
terminal failures.
In `@internal/workers/wiring.go`:
- Around line 116-119: Move the queues[service.EmbeddingsReconcileQueueName]
registration outside the EmbeddingReconcileSweeper nil/enablement guard so it is
always registered whenever embeddings are enabled. Keep its MaxWorkers sourced
from cfg.Embedding.ReconcileMaxConcurrent, and leave the singular
EmbeddingReconcileQueueName registration governed by the existing sweeper
condition.
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📒 Files selected for processing (39)
.env.examplecharts/hub/values.yamlcmd/api/app.gocmd/backfill-embeddings/main.gocmd/worker/app.gocmd/worker/app_test.gointernal/config/config.gointernal/config/config_test.gointernal/googleai/client.gointernal/googleai/client_test.gointernal/models/enrichment_failure.gointernal/models/taxonomy.gointernal/observability/names.gointernal/openai/client.gointernal/openai/client_test.gointernal/repository/embeddings_repository.gointernal/repository/enrichment_failures_repository.gointernal/repository/enrichment_status_repository.gointernal/repository/feedback_records_repository.gointernal/repository/taxonomy_repository.gointernal/service/embedding_reconcile.gointernal/service/embedding_reconcile_job_args.gointernal/service/embedding_reconcile_test.gointernal/service/job_inserter.gointernal/service/job_kinds.gointernal/service/job_kinds_test.gointernal/service/webhook_provider.gointernal/workers/embedding_reconcile.gointernal/workers/embedding_reconcile_test.gointernal/workers/enrichment_worker.gointernal/workers/feedback_embedding.gointernal/workers/feedback_embedding_test.gointernal/workers/wiring.gointernal/workers/wiring_test.gomigrations/024_add_taxonomy_embedding_failures.sqlopenapi.yamltests/embedding_reconcile_test.gotests/enrichment_failures_test.gotests/taxonomy_api_test.go
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xernobyl
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Hello! Did an independent pass on this one, including a security review and a local smoke test against a real Postgres. The design reads careful and the incident framing makes sense to me — one blocker though, plus a few smaller things.
🔴 P1 — the reconciler can wedge itself permanently on whitespace-only records
internal/repository/embeddings_repository.go:313 uses bare btrim(), which strips ASCII space only, while the worker gates on Go strings.TrimSpace (all Unicode whitespace). So for a value_text of "\t", "\n", "\r\n", "\v" or "\f":
- the sweep selects the record (bare
btrimleaves it non-empty); - the worker computes empty text and takes the clear path (
internal/workers/feedback_embedding.go:404->SetEmbedding(nil)->DeleteByFeedbackRecordAndModel), so noembeddingsrow is ever created; - the job returns success, so no failure marker is written and no cooldown ever applies;
NOT EXISTS (embeddings)is still true -> the same record is selected again on the next sweep. Forever.
Combined with ORDER BY fr.collected_at, fr.id (:334) and TARGET_DEPTH=100, 100+ such records older than the real backlog take every slot of every sweep. I seeded 120 of them ahead of a genuine 500-record backlog on a 150k-record database, and the sweep returned 100/100 churn and 0 genuine repairs, indefinitely — which is the opposite of the "poison records cannot monopolize every sweep" property in the description.
I think the fix is just to reuse the predicate we already have for exactly this — btrim(x, E' \t\n\v\f\r'), as in enrichment_status_repository.go:67, whose comment is explicitly about this trap ("Do not 'restore parity' by weakening this to bare btrim"). That covers tab/newline/VT/FF/CR. NBSP (U+00A0) and U+3000 still pass both predicates — the existing comment accepts that for a count, but this is an enqueue loop, so it may be worth having the clear path in the repair lane mark the record ineligible too.
Worth noting it is reachable through normal ingestion: value_text only validates omitempty,no_null_bytes and there is no CHECK constraint, so a survey answer that is just a newline gets stored as-is.
🟡 P2 — the terminal length classification probably will not fire for our own deployment
internal/openai/client.go:451 and internal/googleai/client.go:404 both require HTTP 400/413 plus OpenAI/Gemini message wording. We embed via TEI through the OpenAI-compatible path (EMBEDDING_BASE_URL), and the monorepo chart generates no --auto-truncate (extraArgs default is just ["--dtype","float16"], and prod adds none), so over-long input does error rather than being silently truncated. TEI reports that as a validation error whose status and wording match none of the markers — so those records never go terminal: five attempts, non-terminal marker, 15 min cooldown, repeat indefinitely, burning provider calls each round.
Caveat, and I could be wrong here: I inferred TEI's exact status and message from its docs rather than reproducing it against a live TEI. The EU-import errors in the prod logs would confirm it quickly. If it holds, adding a TEI marker before flipping the flag on would be good.
🟡 P3 — smaller things
- The sweep query is O(table) rather than O(limit) — the
LIMITnever bounds it because the sort precedes it, so it is a full scan offeedback_recordsplus one index probe per row. Measured 58 ms at 150k records (warm, after VACUUM), so fine at a 5-minute cadence, and I could not find a clean index fix either (the "missing" predicate lives in another table, and an orderedcollected_atwalk is worse when the backlog is recent). Might deserve a comment saying the cost is deliberate. tests/embedding_reconcile_test.go:124leans onlimit 100_000to cope with a shared local database, and that is fragile — with 150k records its own fixtures sort past the limit and the test fails (I hit this locally). Scoping the query by tenant would be sturdier.- Migration 024 collides with #128 (which holds 024 + 025) — you already call this out, so just flagging that #128 is open and mergeable too right now. Separately, #128 adds a near-identical reconciler framework, so it is probably worth agreeing which one is the shared one before both land.
- Cross-repo follow-up, not for this PR: the Topics & Subtopics gate in the web app is
record_count - embedding_count > 50, so terminally-failed records read as pending forever and keep the page hard-gated even though the Hub now knows they will never embed.embedding_failed_terminal_countis exactly the signal needed, but nothing consumes it yet — happy to file that one.
Security review — no findings
The reconciler being deployment-wide matches the existing global backfill and the ids never leave the deployment; the failure marker takes TenantID from the loaded record rather than from job args; the write-lock param index move (7 -> 9) lines up with the Exec arg order; the new taxonomy fields are counts only under the existing tenant scope, and joining failures on feedback_record_id alone cannot cross tenants since the FK makes the record authoritative; all the new SQL is parameterized with only compile-time literals concatenated. No new endpoints, egress or dependencies.
Also confirmed migration 024 applies, rolls back to 023 and re-applies cleanly, and that the full integration and unit suites are green on a clean database.
Nice work on this overall — the failure-marker scoping by model + revision is a good call, and goes without saying that the P1 is a small diff away =)
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@xernobyl Thank you for the independent pass and the database reproduction. I checked each point against the current PR head. Addressed in
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Follow-up on the validation above: the first changed-head CI run exposed a PostgreSQL 16-specific escape behavior in the new regression. PostgreSQL 16 interprets Fixed in |
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Thanks for the PR — this looks good, and the whitespace fix holds up. I drove the repair selector with all 25 Unicode One thing though — I think you missed a spot ;D The new predicate landed in the sweep and in
I measured both consequences against a real Postgres. The Topics & Subtopics gate stays stuck, with nothing to explain it. 60 whitespace-only records plus 3 embedded ones in a single field:
And No amount of self-healing can lift that one. Both are pre-existing on Happy to be talked out of it if you would rather keep the diff tight and take it as a follow-up. |
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Thanks for the PR — this looks good, and the whitespace fix holds up. I drove the repair selector with all 25 Unicode White_Space runes plus five space-like ones Go does not trim (ZWSP, BOM, U+180E, ZWNJ, Braille blank), and it is correct in both directions, so nothing is over-trimmed into silent abandonment either. Reverting the constant turns your regression test red, so it is a real test. Your PG16 diagnosis checks out exactly too: ascii(E'\v') is 118 on 16 and 11 on 18. And you were right about TEI — the chart pins cpu-1.9, gitops pins the 1.9 digest, and v1.9.0 does list --auto-truncate defaulting to true under breaking changes, so my length-classifier point does not hold. Dropping it.
One thing though — I think you missed a spot ;D
The new predicate landed in the sweep and in countTaxonomyEmbeddingBacklogAggregateSQL, but three call sites still use bare btrim, and they happen to be the ones users actually hit:
internal/repository/taxonomy_repository.go:86—ListFieldOptionsinternal/repository/taxonomy_repository.go:145and:166—CountScopeInput
I measured both consequences against a real Postgres.
The Topics & Subtopics gate stays stuck, with nothing to explain it. 60 whitespace-only records plus 3 embedded ones in a single field:
record_count=63 embedding_count=3 failed=0 failed_terminal=0 -> pending=60
reconciler considers 0 of this tenant's records repairable
record_count - embedding_count is exactly what the web gate reads, and neither of the new failure counts covers that residue — so the page hard-gates forever on records the sweep now (correctly) refuses to touch.
And CreateRun gets permanently rejected, which I think is the worse of the two. internal/service/taxonomy_service.go:184 enforces 90% coverage over that same inflated denominator. 100 healthy embedded records plus 12 whitespace-only ones:
record_count=112 embedding_count=100 coverage=89.3% (gate is 90%); reconciler repairable=0
No amount of self-healing can lift that one.
Both are pre-existing on main, so this is not a regression you introduced. But since this PR is what establishes the correct predicate, fixes its deployment-wide twin one file over, and adds embedding_failed_*_count to that exact SELECT so consumers can explain the gap, it feels like it belongs here rather than after. taxonomyEmbeddingEligibleTextSQL is already in the same package, so it is a three-site substitution — I tried it locally and the full suite stays green.
Marking this as changes requested since the fix is a small one and this PR is the natural home for it — but shout if you disagree and would rather keep the diff tight, and we can take it as a follow-up instead.
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Separate from the review above, and explicitly not something I want to block on — but while chasing your PG16 finding I noticed the trap also bites the constant next door.
const enrichmentEligibleText = `fr.field_type = 'text' AND fr.value_text IS NOT NULL AND btrim(fr.value_text, E' \t\n\v\f\r') <> ''`Which resolves to different character sets per major version — same root cause you already diagnosed, just pointing the other way:
So on PG16 a one-character Tiny in practice — you need an answer that is exactly |
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@xernobyl Both new findings are valid and addressed in
Regression coverage now exercises field discovery, field and directory counts, field and directory snapshot materialization, translated-text fallback, blank embedded rows, and the PostgreSQL 16 Validation completed before push:
The isolated PostgreSQL 16 container was removed after the test. Please re-review the new head when convenient. |
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Re-reviewed at ddc69aa — both findings are properly closed, and you went further than I asked. Approving 🎉
Splitting the constant into trimSpaceCharactersSQL / taxonomyEmbeddingInputTextSQL / taxonomyEmbeddingEligibleTextSQL is nicer than the flat substitution I suggested — the text expression and the eligibility predicate can no longer drift apart, which is the failure mode that produced this whole thread in the first place.
And the extra site you found is a real bug I had waved off. I dismissed queryMaterializedRunInputRows as safe because it inner-joins embeddings, but it returns the text, and under bare btrim a whitespace-only translation won that COALESCE — so taxonomy would receive an ideographic space as a record's content while the embedding had been computed from the source text. It shows up unmistakably when I revert your change: … ces_comment Feedback [0.25 0 0 …]. Good catch, and thanks for chasing it past what I reported.
What I checked on the new head:
- the two cases I measured last time now come out clean — field discovery went from
record_count=63 embedding_count=3 -> pending=60to3 / 3 -> pending=0, and CreateRun coverage from112 / 100 -> 89.3%(gate 90%) to100 / 100 -> 100% - your new tests can genuinely fail. Reverting
enrichmentEligibleTextredsTestCountEnrichmentStatuson both versions for different reasons — NBSP/U+3000 on PG18, vertical tab plus the literalvon PG16 — which is stronger than I expected when I raised it. Reverting the five taxonomy sites redsrun_input_falls_back_from_whitespace_translation…,directory_run_input_spans_sources_and_fieldsandTestTaxonomyNoSourceScope - full suite green on freshly migrated PostgreSQL 16 and 18, hub plus River migrations, and CI is green on all 11 checks
- the retained note about
classifyBackfillEligibleSQL/translationBackfillSelectSQLstaying barebtrimon purpose is still accurate, and dropping the now-obsolete "approximation in one direction" paragraph was the right call - nothing security-relevant in the delta: predicate and prose only, no new parameters or surface
Two leftovers I am explicitly not blocking on, just noting so they are written down somewhere:
internal/repository/embeddings_repository.go:416and:521, the manual backfill selectors, are still barebtrim. Wasted enqueues only — cursor-paginated so it terminates, the worker's clear path writes no marker, and reconciliation is unaffected.internal/repository/feedback_records_repository.go:852usesE' \t\r\n', which has no\v, so the PG16 trap does not reach it — and it is a symmetric comparison anyway.
Nice work on this one, and sorry for the two extra rounds — the incident framing and the model+revision scoping on the failure markers were right from the start.
main gained its own reconciler for embeddings (#133), which collided with this branch in four ways beyond the migration number. Both sides independently introduced a batch-insert seam. main named it RiverBatchInserter and deleted WebhookDispatchInserter outright; this branch had kept the old name as an alias. Took main's shape -- the alias bought nothing -- and kept this branch's doc note about InsertMany over InsertManyFast, which is the part that is easy to get wrong. Both sides also added a second-lane field to JobKindSpec, and happened to converge on the same name. Merged the entries so embeddings, translation, sentiment and emotions all declare their reconcile lane, and both reconcile kinds are registered. The parity test caught the consequence immediately: probedKinds was still 8 with nine kinds present, which is exactly the drift it exists to fail on. The periodic-job registration was the one place a careless resolution would have shipped a silent regression. main appends to riverCfg.PeriodicJobs; this branch assigned to it. Keeping either side verbatim would have dropped the other's sweep with nothing failing -- no build error, no test, just one reconciler quietly never running. Both now append. main's embedding sweep also inlined the five in-flight job states that InFlightUniqueStates() already provides. With both sweeps now in one file that was two copies of a set whose doc explains why getting it wrong is silent in both directions, so the embedding sweep uses the helper too. Migrations renumbered past main's 024: retry cooldowns 024 -> 025, pending indexes 025 -> 026. Verified goose applies all three in order on a fresh database.
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Summary
Incident addressed
During the EU import, 48 taxonomy embeddings exhausted three 30-second attempts while TEI was overloaded. The progress surface then had no durable failed state and no automatic path to requeue those missing rows. This change makes that recovery automatic and bounded without allowing historical work to delay live embeddings.
Safety properties
Validation
DATABASE_URL=... go test ./... -count=1 -timeout 180smake lintwith the repository-pinned golangci-lint v2.11.4make lint-openapimake migrate-validateMerge ordering
This urgent incident fix is based on current
mainand uses migration 024. Open PR #128 also reserves 024/025 and overlaps the generic batch-inserter/job-kind helpers. Merge this PR first; #128 should then rebase, reuse these helpers, and renumber its migrations. If #128 lands first, this PR must be rebased and its migration renumbered before merge.