elastic/elasticsearch · error · IllegalArgumentException

neither field {fieldX} nor {fieldY} exist

Error message

neither field {fieldX} nor {fieldY} exist

What it means

Error "neither field {fieldX} nor {fieldY} exist" thrown in elastic/elasticsearch.

Source

Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/metric/MatrixStatsResults.java:171

    /** return the correlations as a map - not public, used for getProperty() */
    protected Map<String, HashMap<String, Double>> getCorrelations() {
        return Collections.unmodifiableMap(correlation);
    }

    /** return the correlation coefficient between two fields */
    public Double getCorrelation(String fieldX, String fieldY) {
        if (fieldX.equals(fieldY)) {
            return 1.0;
        }
        return getValFromUpperTriangularMatrix(correlation, fieldX, fieldY);
    }

    /** return the value for two fields in an upper triangular matrix, regardless of row col location. */
    static <M extends Map<String, Double>> double getValFromUpperTriangularMatrix(Map<String, M> map, String fieldX, String fieldY) {
        // for the co-value to exist, one of the two (or both) fields has to be a row key
        if (map.containsKey(fieldX) == false && map.containsKey(fieldY) == false) {
            throw new IllegalArgumentException("neither field " + fieldX + " nor " + fieldY + " exist");
        } else if (map.containsKey(fieldX)) {
            // fieldX exists as a row key
            if (map.get(fieldX).containsKey(fieldY)) {
                // fieldY exists as a col key to fieldX
                return map.get(fieldX).get(fieldY);
            } else {
                // otherwise fieldX is the col key to fieldY
                return map.get(fieldY).get(fieldX);
            }
        } else if (map.containsKey(fieldY)) {
            // fieldX did not exist as a row key, it must be a col key
            return map.get(fieldY).get(fieldX);
        }
        throw new IllegalArgumentException("Coefficient not computed between fields: " + fieldX + " and " + fieldY);
    }

    private static void checkField(String field, Map<String, ?> map) {
        if (field == null) {

View on GitHub (pinned to db6a809a66)

When it happens

Trigger: Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/metric/MatrixStatsResults.java:171 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of elastic/elasticsearch@db6a809a66 (2026-08-12). Data as JSON: /api/errors/14381050edeb91ea. Report an issue: GitHub.