alibaba/nacos · error · IllegalArgumentException

{}

Error message

{}

What it means

Error "{}" thrown in alibaba/nacos.

Source

Thrown at common/src/main/java/com/alibaba/nacos/common/utils/Preconditions.java:42

 * @date 2021/7/29
 */
public class Preconditions {
    
    private Preconditions() {
    }
    
    /**
     * check precondition.
     * @param expression a boolean expression
     * @param errorMessage the exception message to use if the check fails
     * @throws IllegalArgumentException if {@code expression} is false
     */
    public static void checkArgument(boolean expression, Object errorMessage) {
        if (Objects.isNull(errorMessage)) {
            throw new IllegalArgumentException("errorMessage cannot be null.");
        }
        if (!expression) {
            throw new IllegalArgumentException(String.valueOf(errorMessage));
        }
    }
    
    /**
     * check precondition.
     * @param expression a boolean expression
     * @param errorMessageTemplate the exception message template to use if the check fails
     * @param errorMessageArgs the arguments to be substituted into the message template.
     * @throws IllegalArgumentException if {@code expression} is false
     */
    public static void checkArgument(boolean expression, String errorMessageTemplate,
        Object... errorMessageArgs) {
        if (Objects.isNull(errorMessageArgs) || Objects.isNull(errorMessageTemplate)) {
            throw new IllegalArgumentException(
                "errorMessageTemplate or errorMessage cannot be null.");
        }
        if (!expression) {
            throw new IllegalArgumentException(

View on GitHub (pinned to 9b989acdf1)

Solutions

1. Review the input and runtime state for Preconditions check, correct the reported problem, and retry.

When it happens

Trigger: Thrown at common/src/main/java/com/alibaba/nacos/common/utils/Preconditions.java:42 when the library encounters an invalid state.

Common situations: A Preconditions check failed with the supplied message.

AI-assisted analysis of alibaba/nacos@9b989acdf1 (2026-08-14). Data as JSON: /api/errors/3fd24a98e4458785. Report an issue: GitHub.