{"record":{"id":"a23326e734cc0932","repo":"alibaba/spring-ai-alibaba","slug":"workflow-config-invalid","errorCode":"WORKFLOW_CONFIG_INVALID","errorMessage":"the current node has no successor node, and it cannot function properly.","messagePattern":"the current node has no successor node, and it cannot function properly\\.","errorType":"error_code","errorClass":"BizException","httpStatus":null,"severity":"error","filePath":"spring-ai-alibaba-admin/spring-ai-alibaba-admin-server-core/src/main/java/com/alibaba/cloud/ai/studio/core/workflow/processor/AbstractExecuteProcessor.java","lineNumber":186,"sourceCode":"\t}\n\n\t/**\n\t * Pre-execution validation checks. Verifies: 1. Workflow is not stopped 2. Node has\n\t * valid successors (unless it's an end node)\n\t * @param graph The workflow graph\n\t * @param node The node to validate\n\t * @param context The workflow context\n\t * @throws BizException if validation fails\n\t */\n\tpublic void preCheck(DirectedAcyclicGraph<String, Edge> graph, Node node, WorkflowContext context) {\n\t\t// boolean b = workflowInnerService.checkValidFlag(context);\n\t\tif (context.getTaskStatus().equals(NodeStatusEnum.STOP.getCode())) {\n\t\t\tthrow new BizException(ErrorCode.WORKFLOW_RUN_CANCEL.toError(\"Manually terminated\"));\n\t\t}\n\t\tif ((!node.getId().startsWith(\"End_\") && !node.getId().startsWith(\"IteratorEnd_\")\n\t\t\t\t&& !node.getId().startsWith(\"ParallelEnd_\"))\n\t\t\t\t&& CollectionUtils.isEmpty(graph.outgoingEdgesOf(node.getId()))) {\n\t\t\tthrow new BizException(ErrorCode.WORKFLOW_CONFIG_INVALID\n\t\t\t\t.toError(\"the current node has no successor node, and it cannot function properly.\"));\n\t\t}\n\t}\n\n\t/**\n\t * Core execution logic to be implemented by concrete processors.\n\t * @param graph The workflow graph\n\t * @param node The node to execute\n\t * @param context The workflow context\n\t * @return NodeResult containing execution results\n\t */\n\tpublic abstract NodeResult innerExecute(DirectedAcyclicGraph<String, Edge> graph, Node node,\n\t\t\tWorkflowContext context);\n\n\t/**\n\t * Processes node variables and updates context. Maps input/output parameters and\n\t * updates variable cache.\n\t * @param graph The workflow graph","sourceCodeStart":168,"sourceCodeEnd":204,"githubUrl":"https://github.com/alibaba/spring-ai-alibaba/blob/f82da0b50f35744c13968191be2b1cd2452ef550/spring-ai-alibaba-admin/spring-ai-alibaba-admin-server-core/src/main/java/com/alibaba/cloud/ai/studio/core/workflow/processor/AbstractExecuteProcessor.java#L168-L204","documentation":"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.","triggerScenarios":"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.","commonSituations":"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.","solutions":["Open the workflow in the designer and connect the dangling node to a successor or to the appropriate End node","Validate the graph definition before publishing (every non-End node must have outgoing edges)","If the node genuinely terminates a branch, convert it to an End_/IteratorEnd_/ParallelEnd_ node type"],"exampleFix":"// before (definition JSON)\n{\"nodes\":[{\"id\":\"LLM_1\"},{\"id\":\"End_1\"}],\"edges\":[]}\n// after\n{\"nodes\":[{\"id\":\"LLM_1\"},{\"id\":\"End_1\"}],\"edges\":[{\"source\":\"LLM_1\",\"target\":\"End_1\"}]}","handlingStrategy":"validation","validationCode":"for (String nodeId : graph.vertexSet()) {\n    boolean isEnd = nodeId.startsWith(\"End_\") || nodeId.startsWith(\"IteratorEnd_\") || nodeId.startsWith(\"ParallelEnd_\");\n    if (!isEnd && graph.outgoingEdgesOf(nodeId).isEmpty()) {\n        throw new IllegalStateException(\"Node \" + nodeId + \" has no outgoing edge\");\n    }\n}","typeGuard":"static boolean isTerminatorNode(String nodeId) {\n    return nodeId.startsWith(\"End_\") || nodeId.startsWith(\"IteratorEnd_\") || nodeId.startsWith(\"ParallelEnd_\");\n}","tryCatchPattern":"try {\n    processor.execute(graph, node, context);\n} catch (BizException e) {\n    if (ErrorCode.WORKFLOW_CONFIG_INVALID.getCode().equals(e.getCode())) {\n        log.error(\"Workflow definition broken at node {}: {}\", node.getId(), e.getMessage());\n    }\n    throw e;\n}","preventionTips":["Run graph validation (connectivity + edge check) on workflow publish/save","In the designer, prevent deleting edges that would orphan a node","Require every branch to terminate at an explicit End node"],"tags":["workflow","graph","configuration"],"backgroundTag":"invalid-config-value","analyzedSha":"f82da0b50f35744c13968191be2b1cd2452ef550","analyzedAt":"2026-09-09T15:32:42.421Z","contentChangedAt":"2026-09-09T15:32:42.421Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}