alibaba/nacos · error · NacosSerializationException

100

100

Error message

Nacos serialize for class [%s] failed. 

What it means

Error "Nacos serialize for class [%s] failed. " thrown in alibaba/nacos.

Source

Thrown at common/src/main/java/com/alibaba/nacos/common/utils/JacksonUtils.java:64

    static ObjectMapper mapper = new ObjectMapper();
    
    static {
        mapper.disable(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES);
        mapper.setSerializationInclusion(Include.NON_NULL);
    }
    
    /**
     * Object to json string.
     *
     * @param obj obj
     * @return json string
     * @throws NacosSerializationException if transfer failed
     */
    public static String toJson(Object obj) {
        try {
            return mapper.writeValueAsString(obj);
        } catch (JsonProcessingException e) {
            throw new NacosSerializationException(obj.getClass(), e);
        }
    }
    
    /**
     * Object to json string byte array.
     *
     * @param obj obj
     * @return json string byte array
     * @throws NacosSerializationException if transfer failed
     */
    public static byte[] toJsonBytes(Object obj) {
        try {
            return mapper.writeValueAsBytes(obj);
        } catch (JsonProcessingException e) {
            throw new NacosSerializationException(obj.getClass(), e);
        }
    }
    

View on GitHub (pinned to 9b989acdf1)

Solutions

1. Inspect the server logs for the underlying cause, fix it, and retry the operation.

When it happens

Trigger: Thrown at common/src/main/java/com/alibaba/nacos/common/utils/JacksonUtils.java:64 when the library encounters an invalid state.

Common situations: Jackson failed to serialize an object to JSON.

AI-assisted analysis of alibaba/nacos@9b989acdf1 (2026-08-14). Data as JSON: /api/errors/fddbf9725cbe3362. Report an issue: GitHub.