alibaba/spring-ai-alibaba · error · org.springframework.ai.mybatisplus.exception.SerializationException

failed to dump data${data}

Error message

failed to dump data${data}

What it means

Thrown by JsonSerializer.dump when Jackson's objectMapper.writeValueAsString throws JsonProcessingException while serializing the DSL data map to a JSON string. The original data is appended to the message (and the JsonProcessingException kept as cause) to aid diagnosis. In practice this occurs when the map contains non-serializable values such as cyclic references, Java objects without Jackson-compatible accessors, or invalid types inserted programmatically.

Source

Thrown at spring-ai-alibaba-admin/spring-ai-alibaba-admin-server-start/src/main/java/com/alibaba/cloud/ai/studio/admin/builder/generator/service/dsl/serialize/JsonSerializer.java:57

	@Override
	public Map<String, Object> load(String s) {
		try {
			Map<?, ?> value = objectMapper.readValue(s, Map.class);
			return MapReadUtil.safeCastToMapWithStringKey(value);
		}
		catch (Exception e) {
			throw new RuntimeException(e);
		}
	}

	@Override
	public String dump(Map<String, Object> data) {
		String result;
		try {
			result = objectMapper.writeValueAsString(data);
		}
		catch (JsonProcessingException e) {
			throw new SerializationException("failed to dump data" + data, e);
		}
		return result;
	}

}

View on GitHub (pinned to f82da0b50f)

Solutions

1. Inspect the cause (JsonProcessingException) to identify the unserializable value and replace it with a JSON-compatible type (Map/List/String/Number)
2. Ensure any custom objects stored in the DSL map are Jackson-serializable (public getters or @JsonSerialize) or pre-converted via OBJECT_MAPPER.convertValue
3. Break cyclic references in the data structure before dumping
4. Configure the shared ObjectMapper (e.g. disable FAIL_ON_EMPTY_BEANS, register JavaTimeModule) if special types are expected

Example fix

// before
data.put("node", new MyNodeObject()); // not Jackson-serializable

// after
data.put("node", objectMapper.convertValue(new MyNodeObject(), Map.class));

try {
    OBJECT_MAPPER.writeValueAsString(data);
} catch (JsonProcessingException e) {
    throw new IllegalStateException("DSL data is not JSON-serializable: " + e.getMessage());
}

try { String json = jsonSerializer.dump(data); } catch (SerializationException e) { log.error("Serialization failed for data; cause: {}, offending data: {}", e.getCause(), e.getMessage(), e); throw e; }

When it happens

Trigger: dump() called on a data map containing objects Jackson cannot serialize (no getters, cycles, ObjectMapper-visible failures); JsonNode mixed with unserializable custom objects; data mutated after parse to include non-JSON types like Date without a configured serializer; infinite recursion via self-referencing structures.

Common situations: Saving an app after a converter inserted a live Java object instead of a JSON-compatible value; plugin/converter bugs leaking typed objects into the DSL map; ObjectMapper misconfiguration (e.g. failing on empty beans); large cyclic graphs of node data.

Understand the failure class

Background: json.Marshal / "failed to marshal" errors in Go: why "unsupported type" happens and how to fix it — this error's family across 22 libraries.

Related errors

• Failed to parse 'advanced_settings.groups' JSON
• 序列化 defaultParameters 失败
• 序列化 supportedParameters 失败
• Failed to build JSON-RPC payload
• Failed to build JSON-RPC streaming payload

AI-assisted analysis of alibaba/spring-ai-alibaba@f82da0b50f (2026-09-09). Data as JSON: /api/errors/3981175390f45b1a. Report an issue: GitHub.