uranusjr commented on issue #16986:
URL: https://github.com/apache/airflow/issues/16986#issuecomment-880418133
If you already know some Flask, what you need to do is to add a form in the
UI that POST to a new view. That view should take the current task instance’s
id, select it out, set its state to `UP_FOR_RETRY`, and then redirect back to
the task instance view, similar to `TaskInstanceModelView.action_set_retry`
(actually you can just post to that view, but the view is built against
Flask-Appbuilder and manually POST-ing to it is a giant PITA that I strongly
recommended against).
The form should look something like this:
```html
<form action="{{ url_for('name_of_view') }}" method="POST">
<input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
<input type="hidden" name="dag_id" value="{{ dag_id }}">
<input type="hidden" name="task_id" value="{{ task_id }}">
<button type="submit">Retry Task</button>
</form>
```
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