elastic/elasticsearch · error · IllegalArgumentException

Cannot add statistics without field names.

Error message

Cannot add statistics without field names.

What it means

Error "Cannot add statistics without field names." thrown in elastic/elasticsearch.

Source

Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/metric/RunningStats.java:126

        out.writeGenericValue(fieldSum);
        // counts
        out.writeGenericValue(counts);
        // mean
        out.writeGenericValue(means);
        // variances
        out.writeGenericValue(variances);
        // skewness
        out.writeGenericValue(skewness);
        // kurtosis
        out.writeGenericValue(kurtosis);
        // covariances
        out.writeGenericValue(covariances);
    }

    /** updates running statistics with a documents field values **/
    public void add(final String[] fieldNames, final double[] fieldVals) {
        if (fieldNames == null) {
            throw new IllegalArgumentException("Cannot add statistics without field names.");
        } else if (fieldVals == null) {
            throw new IllegalArgumentException("Cannot add statistics without field values.");
        } else if (fieldNames.length != fieldVals.length) {
            throw new IllegalArgumentException("Number of field values do not match number of field names.");
        }

        // update total, mean, and variance
        ++docCount;
        String fieldName;
        double fieldValue;
        double m1, m2, m3, m4;  // moments
        double d, dn, dn2, t1;
        final HashMap<String, Double> deltas = new HashMap<>();
        for (int i = 0; i < fieldNames.length; ++i) {
            fieldName = fieldNames[i];
            fieldValue = fieldVals[i];

            // update counts

View on GitHub (pinned to db6a809a66)

When it happens

Trigger: Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/metric/RunningStats.java:126 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/5067ced6eb1be2e1. Report an issue: GitHub.