Check Dag version compatibility

Oct 13, 2025 by pynkocean.com 55 views

Introduction

Apache Airflow is a powerful workflow management platform that enables users to create, schedule, and monitor complex workflows. However, users have reported an issue with the Dag version being 'vundefined' for mapped task instances in Airflow 3.0.0b2. In this article, we will delve into the details of this issue, explore possible causes, and provide a step-by-step guide to reproduce and resolve the problem.

Problem Description

The issue arises when users attempt to view the Dag version of mapped task instances in the Airflow 3.0.0b2 UI. Instead of displaying the correct Dag version, the UI displays 'vundefined'. This can lead to confusion and difficulties in managing and troubleshooting workflows.

Reproduction Steps

To reproduce the issue, follow these steps:

Run the provided Dag on Airflow 3.0.0b2:

from airflow import DAG
from airflow.decorators import task
from airflow.providers.standard.operators.python import PythonOperator
from datetime import datetime, timedelta


@task
def make_arg_lists():
    return [[1], [2], [{"a": "b"}], ["hello"]]


def consumer(value):
    print(value)


with DAG(
    dag_id="test_mapped_classic",
    start_date=datetime(1970, 1, 1),
    schedule=None,
    tags=["taskmap"]
) as dag:
    PythonOperator.partial(task_id="consumer", python_callable=consumer).expand(
        op_args=make_arg_lists()
    )

Observe the Dag version of mapped task instances in the Airflow 3.0.0b2 UI. The Dag version should be displayed as 'vundefined'.

Possible Causes

The issue may be caused by a combination of factors, including:

Incompatible Dag version: The Dag version may not be compatible with Airflow 3.0.0b2, leading to incorrect Dag version display.
Mapping issues: Issues with task mapping may cause the Dag version to be displayed as 'vundefined'.
Airflow configuration: Incorrect Airflow configuration may lead to the issue.

Resolution Steps

To resolve the issue, follow these steps:

Check Dag version compatibility: Verify that the Dag version is compatible with Airflow 3.0.0b2.
Review task mapping: Ensure that task mapping is correct and not causing the issue.
Check Airflow configuration: Review Airflow configuration to ensure that it is correct and not causing the issue.
Update Airflow providers: Update Airflow providers to the latest version.
Restart Airflow: Restart Airflow to apply changes.

Conclusion

The issue of Dag version being 'vundefined' for mapped task instances in Airflow 3.0.0b2 can be resolved by following the steps outlined above. By checking Dag version compatibility, reviewing task mapping, and updating Airflow providers, users can resolve the issue and ensure that the Dag version is displayed correctly.

Additional Information

Apache Airflow version: 3.0.0b2
Operating System: Linux
Versions of Apache Airflow Providers: Not provided
Deployment: Other
Deployment details: Not provided
Anything else?: Not provided
Are you willing to submit PR?: No
Code of Conduct: Agreed to follow the project's Code of Conduct.
Dag Version is 'vundefined' for Mapped Task Instances in Apache Airflow 3.0.0b2: Q&A ====================================================================================

Introduction

Apache Airflow is a powerful workflow management platform that enables users to create, schedule, and monitor complex workflows. However, users have reported an issue with the Dag version being 'vundefined' for mapped task instances in Airflow 3.0.0b2. In this article, we will provide a Q&A section to address common questions and concerns related to this issue.

Q: What is the Dag version being 'vundefined' issue in Airflow 3.0.0b2?

A: The Dag version being 'vundefined' issue in Airflow 3.0.0b2 refers to the problem where the Dag version of mapped task instances is displayed as 'vundefined' in the Airflow UI.

Q: What are the possible causes of the Dag version being 'vundefined' issue?

A: The possible causes of the Dag version being 'vundefined' issue include:

Incompatible Dag version
Mapping issues
Airflow configuration issues

Q: How can I check if my Dag version is compatible with Airflow 3.0.0b2?

A: To check if your Dag version is compatible with Airflow 3.0.0b2, you can:

Check the Airflow documentation for compatible Dag versions
Review the Airflow changelog for any changes related to Dag versions
Contact Airflow support for assistance

Q: How can I review task mapping to ensure it is correct?

A: To review task mapping, you can:

Check the Airflow UI for any task mapping errors
Review the Dag code for any task mapping issues
Use Airflow's built-in task mapping tools to identify and fix issues

Q: How can I update Airflow providers to the latest version?

A: To update Airflow providers to the latest version, you can:

Check the Airflow documentation for instructions on updating providers
Use Airflow's built-in provider update tools
Contact Airflow support for assistance

Q: How can I restart Airflow to apply changes?

A: To restart Airflow, you can:

Use the Airflow UI to restart the Airflow service
Use the command line to restart the Airflow service
Contact Airflow support for assistance

Q: What are the benefits of resolving the Dag version being 'vundefined' issue?

A: Resolving the Dag version being 'vundefined' issue can provide several benefits, including:

Improved workflow management
Enhanced Dag version display
Reduced errors and issues

Q: How can I prevent the Dag version being 'vundefined' issue from occurring in the future?

A: To prevent the Dag version being 'vundefined' issue from occurring in the future, you can:

Regularly update Airflow providers to the latest version
Review task mapping to ensure it is correct
Check Dag version compatibility with Airflow 3.0.0b2

Conclusion

The Dag version being 'vundefined' issue in Airflow 3.0.0b2 can be resolved by following the steps outlined above. By checking Dag version compatibility, reviewing task mapping, and updating Airflow providers, users can resolve the issue and ensure that the Dag version is displayed correctly.

Additional Information

Apache Airflow version: 3.0.0b2
Operating System: Linux
Versions of Apache Airflow Providers: Not provided
Deployment: Other
Deployment details: Not provided
Anything else?: Not provided
Are you willing to submit PR?: No
Code of Conduct: Agreed to follow the project's Code of Conduct.