Gantt view gives "Error invalid date" on DagRun in running state

[jvstein]

Apache Airflow version

3.1.8

What happened and how to reproduce it?

1. Create a DAG in the Airflow system and trigger a new run.
2. In the grid view, click the top vertical bar to select the new running DagRun.
3. From the "Options" drop-down, check the "Show Gantt" checkbox.

You will immediately be taken to an error page. It seems the Gantt view is not usable on a running DagRun.

What you think should happen instead?

The Gantt view should still work on a running DagRun like it did in Airflow 2, with the view gradually expanding as tasks continue to run.

Operating System

Debian bookworm

Versions of Apache Airflow Providers

apache-airflow-providers-amazon==9.23.0
apache-airflow-providers-apache-iceberg==2.0.0
apache-airflow-providers-celery==3.17.1
apache-airflow-providers-cncf-kubernetes==10.14.0
apache-airflow-providers-common-compat==1.14.1
apache-airflow-providers-common-io==1.7.1
apache-airflow-providers-common-sql==1.33.0
apache-airflow-providers-fab==3.5.0
apache-airflow-providers-google==20.0.0
apache-airflow-providers-hashicorp==4.5.0
apache-airflow-providers-http==6.0.0
apache-airflow-providers-mysql==6.5.0
apache-airflow-providers-postgres==6.6.1
apache-airflow-providers-sendgrid==4.2.1
apache-airflow-providers-slack==9.8.0
apache-airflow-providers-smtp==2.4.3
apache-airflow-providers-standard==1.12.1
apache-airflow-providers-trino==6.5.0

Deployment

Official Apache Airflow Helm Chart

Deployment details

Kubernetes deployment with a customized docker image derived from the standard image.

Anything else?

Every time on pretty much every DAG.

Are you willing to submit PR?

• Yes I am willing to submit a PR!

Code of Conduct

• I agree to follow this project's Code of Conduct