{"record":{"id":"7f8d27db635c4d05","repo":"apache/dolphinscheduler","slug":"dispatch-task-taskexecution-getname-to","errorCode":null,"errorMessage":"\"Dispatch task: \" + taskExecution.getName() + \" to executor failed\"","messagePattern":"\"Dispatch task: \" \\+ taskExecution\\.getName\\(\\) \\+ \" to executor failed\"","errorType":"exception","errorClass":"TaskDispatchException","httpStatus":null,"severity":"error","filePath":"dolphinscheduler-master/src/main/java/org/apache/dolphinscheduler/server/master/engine/task/client/TaskExecutorClient.java","lineNumber":58,"sourceCode":" */\n@Slf4j\n@Component\npublic class TaskExecutorClient implements ITaskExecutorClient {\n\n    @Autowired\n    private LogicTaskExecutorClientDelegator logicTaskExecutorClientDelegator;\n\n    @Autowired\n    private PhysicalTaskExecutorClientDelegator physicalTaskExecutorClientDelegator;\n\n    @Override\n    public void dispatch(ITaskExecution taskExecution) throws TaskDispatchException {\n        try {\n            getTaskExecutorClientDelegator(taskExecution).dispatch(taskExecution);\n        } catch (TaskDispatchException taskDispatchException) {\n            throw taskDispatchException;\n        } catch (Exception ex) {\n            throw new TaskDispatchException(\"Dispatch task: \" + taskExecution.getName() + \" to executor failed\",\n                    ex);\n        }\n    }\n\n    @Override\n    public boolean reassignWorkflowInstanceHost(final ITaskExecution taskExecution) throws TaskReassignMasterHostException {\n        try {\n            return getTaskExecutorClientDelegator(taskExecution)\n                    .reassignMasterHost(taskExecution);\n        } catch (Exception ex) {\n            throw new TaskReassignMasterHostException(\n                    \"Take over task: \" + taskExecution.getName() + \" from executor failed\",\n                    ex);\n        }\n    }\n\n    @Override\n    public void pause(final ITaskExecution taskExecution) throws TaskPauseException {","sourceCodeStart":40,"sourceCodeEnd":76,"githubUrl":"https://github.com/apache/dolphinscheduler/blob/02eac45a1b6676e639fcbfb4be2243de5771b05d/dolphinscheduler-master/src/main/java/org/apache/dolphinscheduler/server/master/engine/task/client/TaskExecutorClient.java#L40-L76","documentation":"TaskExecutorClient.dispatch is the top-level facade: it picks the right delegator (logic or physical) and delegates. If the delegator throws anything that is not already a TaskDispatchException, it is wrapped into a TaskDispatchException with message 'Dispatch task: <name> to executor failed' and the original as cause. It is a catch-all for unexpected errors in the dispatch path (e.g. delegator wiring failures, NPEs, precondition violations).","triggerScenarios":"getTaskExecutorClientDelegator(taskExecution).dispatch(taskExecution) throws any Exception other than TaskDispatchException — e.g. IllegalArgumentException from checkArgument (empty host), NPE from an uninitialized context, or a Spring wiring failure — caught by catch (Exception ex).","commonSituations":"Task instance not fully initialized before dispatch (missing host/context fields); misconfigured Spring context so a delegator dependency is null; a bug or unexpected state in a custom delegator; version mismatch introducing an unchecked exception deeper in the stack.","solutions":["Read the caused-by exception to find the real defect (usually an uninitialized TaskInstance/TaskExecutionContext field)","Ensure the task instance is initialized (host, worker group, context) before calling TaskExecutorClient.dispatch","Check Spring wiring/bean configuration for the delegator beans if the cause is NPE/dependency injection related","If reproducible with a standard task type, file/inspect an issue — this wrapper usually signals an engine bug rather than an environment problem"],"exampleFix":"// before\n// error surfaced as generic wrapper at dispatch time\n// after\n// validate before dispatch\nif (StringUtils.isEmpty(taskExecution.getTaskExecutionContext().getWorkerGroup())) {\n    throw new IllegalStateException(\"Task \" + taskExecution.getName() + \" has no worker group set\");\n}","handlingStrategy":"try-catch","validationCode":"if (taskExecution == null || !taskExecution.isTaskInstanceInitialized()) {\n    throw new IllegalStateException(\"Task instance must be initialized before dispatch\");\n}","typeGuard":"boolean isDispatchable(ITaskExecution t) {\n    return t != null && t.isTaskInstanceInitialized() && t.getTaskExecutionContext() != null;\n}","tryCatchPattern":"try {\n    taskExecutorClient.dispatch(taskExecution);\n} catch (TaskDispatchException e) {\n    log.error(\"Dispatch of task {} failed: {}\", taskExecution.getName(), e.getMessage(), e);\n    // transition the task to failure via the lifecycle event path, not ad-hoc state changes\n}","preventionTips":["Never call dispatch before the TaskInstance/TaskExecutionContext is fully initialized","Keep all delegator beans properly wired in the Spring context","Catch TaskDispatchException at exactly one engine boundary and route it through lifecycle events","Add integration tests (AbstractMasterIntegrationTestCase) for dispatch failure paths"],"tags":["task-dispatch","wrapper","master"],"backgroundTag":"task-dispatch-failed","analyzedSha":"02eac45a1b6676e639fcbfb4be2243de5771b05d","analyzedAt":"2026-09-06T17:43:00.555Z","contentChangedAt":"2026-09-06T17:43:00.555Z","schemaVersion":2},"datasetVersion":"2026-09-14T05:17:10.506Z"}