elastic/elasticsearch · error · IllegalArgumentException

Unsupported token [{token}]

Error message

Unsupported token [{token}]

What it means

Error "Unsupported token [{token}]" thrown in elastic/elasticsearch.

Source

Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/pipeline/MovFnPipelineAggregationBuilder.java:70

        (args, name) -> new MovFnPipelineAggregationBuilder(name, (String) args[0], (Script) args[1], (int) args[2])
    );
    static {
        PARSER.declareString(constructorArg(), BUCKETS_PATH_FIELD);
        PARSER.declareField(
            constructorArg(),
            (p, c) -> Script.parse(p),
            Script.SCRIPT_PARSE_FIELD,
            ObjectParser.ValueType.OBJECT_OR_STRING
        );
        PARSER.declareInt(constructorArg(), WINDOW);

        PARSER.declareInt(MovFnPipelineAggregationBuilder::setShift, SHIFT);
        PARSER.declareString(MovFnPipelineAggregationBuilder::format, FORMAT);
        PARSER.declareField(MovFnPipelineAggregationBuilder::gapPolicy, p -> {
            if (p.currentToken() == XContentParser.Token.VALUE_STRING) {
                return GapPolicy.parse(p.text().toLowerCase(Locale.ROOT), p.getTokenLocation());
            }
            throw new IllegalArgumentException("Unsupported token [" + p.currentToken() + "]");
        }, GAP_POLICY, ObjectParser.ValueType.STRING);
    }

    public MovFnPipelineAggregationBuilder(String name, String bucketsPath, Script script, int window) {
        super(name, NAME, new String[] { bucketsPath });
        this.bucketsPathString = bucketsPath;
        this.script = script;
        if (window <= 0) {
            throw new IllegalArgumentException("[" + WINDOW.getPreferredName() + "] must be a positive, non-zero integer.");
        }
        this.window = window;
    }

    public MovFnPipelineAggregationBuilder(StreamInput in) throws IOException {
        super(in, NAME);
        bucketsPathString = in.readString();
        script = new Script(in);
        format = in.readOptionalString();

View on GitHub (pinned to db6a809a66)

When it happens

Trigger: Thrown at modules/aggregations/src/main/java/org/elasticsearch/aggregations/pipeline/MovFnPipelineAggregationBuilder.java:70 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/852d2930baa7787a. Report an issue: GitHub.