alibaba/spring-ai-alibaba · error · IllegalArgumentException

Graph name must be provided

Error message

Graph name must be provided

What it means

The graph name is used as the node/state identifier when compiling the state graph; validateConfig rejects a null or blank name with IllegalArgumentException because downstream compilation cannot proceed without it.

Source

Thrown at spring-ai-alibaba-agent-framework/src/main/java/com/alibaba/cloud/ai/graph/agent/flow/strategy/FlowGraphBuildingStrategy.java:71

	/**
	 * Returns the type identifier for this strategy. This is used for registration and
	 * lookup purposes.
	 * @return the strategy type identifier
	 */
	String getStrategyType();

	/**
	 * Validates that the configuration contains all required parameters for this
	 * strategy.
	 * @param config the configuration to validate
	 * @throws IllegalArgumentException if validation fails
	 */
	default void validateConfig(FlowGraphBuilder.FlowGraphConfig config) {
		if (config == null) {
			throw new IllegalArgumentException("Configuration cannot be null");
		}
		if (config.getName() == null || config.getName().trim().isEmpty()) {
			throw new IllegalArgumentException("Graph name must be provided");
		}
		if (config.getRootAgent() == null) {
			throw new IllegalArgumentException("Root agent must be provided");
		}
		if (config.getKeyStrategyFactory() == null) {
			// Generate a new KeyStrategyFactory based on agent keys
			KeyStrategyFactory generatedFactory = generateKeyStrategyFactory(config);
			config.keyStrategyFactory(generatedFactory);
		}
	}

	/**
	 * Generates a KeyStrategyFactory based on the root agent and sub-agents.
	 * @param config the configuration containing agents
	 * @return the generated KeyStrategyFactory
	 */
	default KeyStrategyFactory generateKeyStrategyFactory(FlowGraphBuilder.FlowGraphConfig config) {
		return () -> {

View on GitHub (pinned to f82da0b50f)

Solutions

1. Always call .name("...") on the builder with a non-blank identifier
2. If the name comes from configuration, validate/trim it and apply a default before building
3. Add a pre-build assertion that config.getName() is non-blank

Example fix

// before
FlowGraphBuilder.builder().rootAgent(root).build();
// after
FlowGraphBuilder.builder().name("order-flow").rootAgent(root).build();

if (config.getName() == null || config.getName().trim().isEmpty()) throw new IllegalArgumentException("Graph name is required before build()");

static boolean hasName(FlowGraphBuilder.FlowGraphConfig c) { return c.getName() != null && !c.getName().trim().isEmpty(); }

try { return builder.build(); } catch (IllegalArgumentException e) { if (e.getMessage().contains("Graph name")) { builder.name(defaultName); return builder.build(); } throw e; }

When it happens

Trigger: FlowGraphConfig built without calling name(...), or name set to ""/" " from an empty application property or request field.

Common situations: Binding graph name from external config (YAML/env) that is unset; copy-pasted builder code missing the name() call; dynamic flows where a user-supplied title was empty.

Understand the failure class

Background: "is required", "must be set", "missing required field": configuration validation errors across open-source libraries — this error's family across 36 libraries.

Related errors

• Conditional flow requires at least one conditional agent map
• Root agent must be provided
• WORKFLOW_CONFIG_ILLEGAL
• 模型缺少 id
• 模型缺少 name

AI-assisted analysis of alibaba/spring-ai-alibaba@f82da0b50f (2026-09-09). Data as JSON: /api/errors/c0cad6d6bc47f35a. Report an issue: GitHub.