elastic/elasticsearch · error · ParsingException

Unexpected token {token} [{currentFieldName}] in [{aggregati

Error message

Unexpected token {token} [{currentFieldName}] in [{aggregationName}]

What it means

Error "Unexpected token {token} [{currentFieldName}] in [{aggregationName}]" thrown in elastic/elasticsearch.

Source

Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/metric/ArrayValuesSourceParser.java:195

        final Map<String, Object> missing
    ) throws IOException {
        XContentParser.Token token = parser.currentToken();
        if (token == null) {
            token = parser.nextToken();
        }

        if (token == XContentParser.Token.FIELD_NAME) {
            final String fieldName = parser.currentName();
            if (missing.containsKey(fieldName)) {
                throw new ParsingException(
                    parser.getTokenLocation(),
                    "Missing field [" + fieldName + "] already defined as [" + missing.get(fieldName) + "] in [" + aggregationName + "]."
                );
            }
            parser.nextToken();
            missing.put(fieldName, parser.objectText());
        } else {
            throw new ParsingException(
                parser.getTokenLocation(),
                "Unexpected token " + token + " [" + currentFieldName + "] in [" + aggregationName + "]"
            );
        }
    }

    /**
     * Creates a {@link ValuesSourceAggregationBuilder} from the information
     * gathered by the subclass. Options parsed in
     * {@link ArrayValuesSourceParser} itself will be added to the factory
     * after it has been returned by this method.
     *
     * @param aggregationName
     *            the name of the aggregation
     * @param valuesSourceType
     *            the type of the {@link ValuesSource}
     * @param otherOptions
     *            a {@link Map} containing the extra options parsed by the

View on GitHub (pinned to db6a809a66)

When it happens

Trigger: Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/metric/ArrayValuesSourceParser.java:195 when the library encounters an invalid state.

Common situations: See trigger scenarios.

Understand the failure class

• Parsing and encoding errors: unexpected token, malformed input — why parsers reject input and how to find the real culprit.

AI-assisted analysis of elastic/elasticsearch@db6a809a66 (2026-08-12). Data as JSON: /api/errors/3e6fb604ec7727c2. Report an issue: GitHub.