quickwit-oss/tantivy · error

could not find field in accessors

Error message

could not find field in accessors

What it means

Fires in the top-hits collector's collect loop: for each sort key of the top_hits request it indexes the per-field accessor vector by the sort clause position. The accessors vec is built 1:1 with req.sort during preparation, so accessors.get(idx) should always be Some; the panic means fewer accessors than sort clauses exist, i.e. preparation and collection are out of sync (an internal invariant violation, e.g. a sort field failed to open an accessor).

Source

Thrown at src/aggregation/metric/top_hits.rs:617

        agg_data: &mut AggregationsSegmentCtx,
    ) -> crate::Result<()> {
        let top_n = &mut self.buckets[parent_bucket_id as usize];
        let req_data = agg_data.get_top_hits_req_data(self.accessor_idx);
        let req = &req_data.req;
        let accessors = &req_data.accessors;
        for &doc_id in docs {
            // TODO: this is terrible, a new vec is allocated for every doc
            // We can fetch blocks instead
            // We don't need to store the order for every value
            let sorts: Vec<DocValueAndOrder> = req
                .sort
                .iter()
                .enumerate()
                .map(|(idx, KeyOrder { order, .. })| {
                    let order = *order;
                    let value = accessors
                        .get(idx)
                        .expect("could not find field in accessors")
                        .0
                        .values_for_doc(doc_id)
                        .next();
                    DocValueAndOrder { value, order }
                })
                .collect();

            top_n.push(
                sorts,
                DocAddress {
                    segment_ord: self.segment_ordinal,
                    doc_id,
                },
            );
        }
        Ok(())
    }

View on GitHub (pinned to b5d8deb80c)

Solutions

1. Verify TopHitsReqData preparation pushed one accessor per sort clause, including nested/dotted field names
2. Log the requested sort field when accessor resolution fails during preparation instead of silently skipping
3. Ensure the same AggregationsSegmentCtx used for preparation is passed to collect

When it happens

Trigger: Thrown at src/aggregation/metric/top_hits.rs:617 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of quickwit-oss/tantivy@b5d8deb80c (2026-09-05). Data as JSON: /api/errors/9006bbf9827d18f8. Report an issue: GitHub.