alibaba/spring-ai-alibaba · error · BizException

WORKFLOW_CONFIG_INVALID

WORKFLOW_CONFIG_INVALID

Error message

the current node has no successor node, and it cannot function properly.

What it means

AbstractExecuteProcessor.preCheck() validates graph topology before executing a node. Any node that is not an End/IteratorEnd/ParallelEnd terminator must have at least one outgoing edge; otherwise it throws BizException WORKFLOW_CONFIG_INVALID because execution could never continue past this node.

Source

Thrown at spring-ai-alibaba-admin/spring-ai-alibaba-admin-server-core/src/main/java/com/alibaba/cloud/ai/studio/core/workflow/processor/AbstractExecuteProcessor.java:186

	}

	/**
	 * Pre-execution validation checks. Verifies: 1. Workflow is not stopped 2. Node has
	 * valid successors (unless it's an end node)
	 * @param graph The workflow graph
	 * @param node The node to validate
	 * @param context The workflow context
	 * @throws BizException if validation fails
	 */
	public void preCheck(DirectedAcyclicGraph<String, Edge> graph, Node node, WorkflowContext context) {
		// boolean b = workflowInnerService.checkValidFlag(context);
		if (context.getTaskStatus().equals(NodeStatusEnum.STOP.getCode())) {
			throw new BizException(ErrorCode.WORKFLOW_RUN_CANCEL.toError("Manually terminated"));
		}
		if ((!node.getId().startsWith("End_") && !node.getId().startsWith("IteratorEnd_")
				&& !node.getId().startsWith("ParallelEnd_"))
				&& CollectionUtils.isEmpty(graph.outgoingEdgesOf(node.getId()))) {
			throw new BizException(ErrorCode.WORKFLOW_CONFIG_INVALID
				.toError("the current node has no successor node, and it cannot function properly."));
		}
	}

	/**
	 * Core execution logic to be implemented by concrete processors.
	 * @param graph The workflow graph
	 * @param node The node to execute
	 * @param context The workflow context
	 * @return NodeResult containing execution results
	 */
	public abstract NodeResult innerExecute(DirectedAcyclicGraph<String, Edge> graph, Node node,
			WorkflowContext context);

	/**
	 * Processes node variables and updates context. Maps input/output parameters and
	 * updates variable cache.
	 * @param graph The workflow graph

View on GitHub (pinned to f82da0b50f)

Solutions

1. Open the workflow in the designer and connect the dangling node to a successor or to the appropriate End node
2. Validate the graph definition before publishing (every non-End node must have outgoing edges)
3. If the node genuinely terminates a branch, convert it to an End_/IteratorEnd_/ParallelEnd_ node type

Example fix

// before (definition JSON)
{"nodes":[{"id":"LLM_1"},{"id":"End_1"}],"edges":[]}
// after
{"nodes":[{"id":"LLM_1"},{"id":"End_1"}],"edges":[{"source":"LLM_1","target":"End_1"}]}

for (String nodeId : graph.vertexSet()) {
    boolean isEnd = nodeId.startsWith("End_") || nodeId.startsWith("IteratorEnd_") || nodeId.startsWith("ParallelEnd_");
    if (!isEnd && graph.outgoingEdgesOf(nodeId).isEmpty()) {
        throw new IllegalStateException("Node " + nodeId + " has no outgoing edge");
    }
}

static boolean isTerminatorNode(String nodeId) {
    return nodeId.startsWith("End_") || nodeId.startsWith("IteratorEnd_") || nodeId.startsWith("ParallelEnd_");
}

try {
    processor.execute(graph, node, context);
} catch (BizException e) {
    if (ErrorCode.WORKFLOW_CONFIG_INVALID.getCode().equals(e.getCode())) {
        log.error("Workflow definition broken at node {}: {}", node.getId(), e.getMessage());
    }
    throw e;
}

When it happens

Trigger: Executing a workflow whose DAG contains a regular node with zero outgoing edges (a dead-end that is not an End node), detected in preCheck via graph.outgoingEdgesOf(nodeId) being empty.

Common situations: Workflow edited in the visual designer where a connecting edge was deleted, a branch was left unfinished, or nodes were imported from a broken/legacy definition JSON.

Understand the failure class

Background: "Invalid value" and "allowed values are" config errors: what your library rejected and how to fix it — this error's family across 41 libraries.

Related errors

• WORKFLOW_CONFIG_INVALID
• WORKFLOW_CONFIG_ILLEGAL
• No default output or error next node provided
• oss ak or sk should be set.
• oss bucket should be set.

AI-assisted analysis of alibaba/spring-ai-alibaba@f82da0b50f (2026-09-09). Data as JSON: /api/errors/a23326e734cc0932. Report an issue: GitHub.