apache/flink · error · IllegalArgumentException

The tuple arity must be in [0, 25].

Error message

The tuple arity must be in [0, 25].

What it means

Error "The tuple arity must be in [0, 25]." thrown in apache/flink.

Source

Thrown at flink-core-api/src/main/java/org/apache/flink/api/java/tuple/Tuple.java:110

     * Shallow tuple copy.
     *
     * @return A new Tuple with the same fields as this.
     */
    public abstract <T extends Tuple> T copy();

    // --------------------------------------------------------------------------------------------

    /**
     * Gets the class corresponding to the tuple of the given arity (dimensions). For example,
     * {@code getTupleClass(3)} will return the {@code Tuple3.class}.
     *
     * @param arity The arity of the tuple class to get.
     * @return The tuple class with the given arity.
     */
    @SuppressWarnings("unchecked")
    public static Class<? extends Tuple> getTupleClass(int arity) {
        if (arity < 0 || arity > MAX_ARITY) {
            throw new IllegalArgumentException(
                    "The tuple arity must be in [0, " + MAX_ARITY + "].");
        }
        return (Class<? extends Tuple>) CLASSES[arity];
    }

    // --------------------------------------------------------------------------------------------
    // The following lines are generated.
    // --------------------------------------------------------------------------------------------

    // BEGIN_OF_TUPLE_DEPENDENT_CODE
    // GENERATED FROM org.apache.flink.api.java.tuple.TupleGenerator.
    public static Tuple newInstance(int arity) {
        switch (arity) {
            case 0:
                return Tuple0.INSTANCE;
            case 1:
                return new Tuple1();
            case 2:

View on GitHub (pinned to 2f3c205e92)

Solutions

1. Address the cause reported by the error message: The tuple arity must be in [0, 25].
2. Verify the inputs, configuration values, and classpath/dependency setup related to this operation, then retry.

Example fix

Correct the condition described ("The tuple arity must be in [0, 25].") and rerun the job or command.

When it happens

Trigger: Triggered at runtime when the operation fails because: The tuple arity must be in [0, 25].

Common situations: Commonly caused by misconfiguration, missing dependencies or files, unsupported types or operations, or invalid user input leading to: The tuple arity must be in [0, 25].

AI-assisted analysis of apache/flink@2f3c205e92 (2026-08-14). Data as JSON: /api/errors/f953f641ccf32273. Report an issue: GitHub.