elastic/elasticsearch · error · ElasticsearchException

Error trying to create multifield_stats results from stream

Error message

Error trying to create multifield_stats results from stream input

What it means

Error "Error trying to create multifield_stats results from stream input" thrown in elastic/elasticsearch.

Source

Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/metric/MatrixStatsResults.java:65

    MatrixStatsResults(RunningStats stats, SamplingContext samplingContext) {
        this.results = stats.clone();
        this.correlation = new HashMap<>();
        this.compute();
        // Note: it is important to scale counts AFTER compute as scaling before could introduce bias
        this.results.docCount = samplingContext.scaleUp(this.results.docCount);
        for (String field : this.results.counts.keySet()) {
            this.results.counts.computeIfPresent(field, (k, v) -> samplingContext.scaleUp(v));
        }
    }

    /** creates a results object from the given stream */
    @SuppressWarnings("unchecked")
    protected MatrixStatsResults(StreamInput in) {
        try {
            results = new RunningStats(in);
            correlation = (Map<String, HashMap<String, Double>>) in.readGenericValue();
        } catch (IOException e) {
            throw new ElasticsearchException("Error trying to create multifield_stats results from stream input", e);
        }
    }

    /** Marshalls MatrixStatsResults */
    @Override
    public void writeTo(StreamOutput out) throws IOException {
        // marshall results
        results.writeTo(out);
        // marshall correlation
        out.writeGenericValue(correlation);
    }

    /** return document count */
    public final long getDocCount() {
        return results.docCount;
    }

    /** return the field counts - not public, used for getProperty() */

View on GitHub (pinned to db6a809a66)

When it happens

Trigger: Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/metric/MatrixStatsResults.java:65 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/1d23e04727cf72e9. Report an issue: GitHub.