TajimaTheMemer opened a new issue #13687: URL: https://github.com/apache/airflow/issues/13687
**Apache Airflow version**: 1.10.12 **Kubernetes version (if you are using kubernetes)** (use `kubectl version`): 1.16.15 **Environment**: - **Cloud provider or hardware configuration**: GCP Cloud Composer (version: `composer-1.13.0-airflow-1.10.12`) - **OS** (e.g. from /etc/os-release): linux - **Kernel** (e.g. `uname -a`): - **Install tools**: - **Others**: **What happened**: BashOperator's callback process `on_success_callback` is sometimes executed twice at the same time. <!-- (please include exact error messages if you can) --> **What you expected to happen**: BashOperator's callback process `on_success_callback` should be executed only once. <!-- What do you think went wrong? --> **How to reproduce it**: Run an arbitrary process that executes BashOprator's `on_success_callback` in a similar environment. <!--- As minimally and precisely as possible. Keep in mind we do not have access to your cluster or dags. If you are using kubernetes, please attempt to recreate the issue using minikube or kind. ## Install minikube/kind - Minikube https://minikube.sigs.k8s.io/docs/start/ - Kind https://kind.sigs.k8s.io/docs/user/quick-start/ If this is a UI bug, please provide a screenshot of the bug or a link to a youtube video of the bug in action You can include images using the .md style of  To record a screencast, mac users can use QuickTime and then create an unlisted youtube video with the resulting .mov file. ---> **Anything else we need to know**: It happens roughly once every five times. It has been confirmed that the callback process of GKEOprator & DummyOperator is always executed only once. --> ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected]
