alibaba/nacos · error · IllegalArgumentException

Invalid {fieldName}: {value}

Error message

Invalid {fieldName}: {value}

What it means

Error "Invalid {fieldName}: {value}" thrown in alibaba/nacos.

Source

Thrown at api/src/main/java/com/alibaba/nacos/api/ai/utils/AgentValidationUtils.java:273

        }
    }
    
    private static boolean isReservedMetadataKey(String key) {
        return "preserved.heart.beat.interval".equals(key)
            || "preserved.heart.beat.timeout".equals(key)
            || "preserved.ip.delete.timeout".equals(key)
            || key.startsWith(INTERNAL_ENDPOINT_METADATA_PREFIX);
    }
    
    private static int codePointLength(String value) {
        return value.codePointCount(0, value.length());
    }
    
    private static void validatePrintableAscii(String value, String fieldName) {
        for (int i = 0; i < value.length(); i++) {
            char current = value.charAt(i);
            if (current < 0x21 || current > 0x7E) {
                throw new IllegalArgumentException("Invalid " + fieldName + ": " + value);
            }
        }
    }
}

View on GitHub (pinned to 9b989acdf1)

Solutions

1. Correct the invalid value for field validation to match the expected format or allowed set, then retry.

When it happens

Trigger: Thrown at api/src/main/java/com/alibaba/nacos/api/ai/utils/AgentValidationUtils.java:273 when the library encounters an invalid state.

Common situations: A validated field contains a value outside its allowed range or pattern.

AI-assisted analysis of alibaba/nacos@9b989acdf1 (2026-08-14). Data as JSON: /api/errors/7ba7238006fc89d1. Report an issue: GitHub.