apache/dolphinscheduler · error · TaskException

openmldb task params is not valid

Error message

openmldb task params is not valid

What it means

A parameter validation guard in OpenmldbTask.init: pythonParameters is null after parsing taskParams (invalid JSON) or checkParameters() failed because required fields (e.g. the SQL/type fields) are missing. The offending input is the taskParams JSON in the task definition; the task aborts at init before any OpenMLDB CLI command is built.

Source

Thrown at dolphinscheduler-task-plugin/dolphinscheduler-task-openmldb/src/main/java/org/apache/dolphinscheduler/plugin/task/openmldb/OpenmldbTask.java:68

    private static final Pattern PYTHON_PATH_PATTERN = Pattern.compile("/bin/python[\\d.]*$");
    public static final Pattern SQL_PATTERN = Pattern.compile("\\S");

    /**
     * constructor
     *
     * @param taskRequest taskRequest
     */
    public OpenmldbTask(TaskExecutionContext taskRequest) {
        super(taskRequest);
    }

    @Override
    public void init() {
        pythonParameters = JSONUtils.parseObject(taskRequest.getTaskParams(), OpenmldbParameters.class);

        log.info("Initialize openmldb task params {}", JSONUtils.toPrettyJsonString(pythonParameters));
        if (pythonParameters == null || !pythonParameters.checkParameters()) {
            throw new TaskException("openmldb task params is not valid");
        }
    }

    /**
     * build python command file path
     *
     * @return python command file path
     */
    @Override
    protected String buildPythonCommandFilePath() {
        return String.format("%s/openmldb_%s.py", taskRequest.getExecutePath(), taskRequest.getTaskAppId());
    }

    /**
     * build python script content from sql
     *
     * @return raw python script
     */

View on GitHub (pinned to 02eac45a1b)

Solutions

1. Complete the required OpenMLDB task fields in the task definition
2. Ensure taskParams JSON deserializes into OpenmldbParameters correctly
3. Validate on save in the UI

When it happens

Trigger: Thrown at dolphinscheduler-task-plugin/dolphinscheduler-task-openmldb/src/main/java/org/apache/dolphinscheduler/plugin/task/openmldb/OpenmldbTask.java:68 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of apache/dolphinscheduler@02eac45a1b (2026-09-06). Data as JSON: /api/errors/e55d175cce93a12a. Report an issue: GitHub.