ephraimbuddy commented on issue #17686:
URL: https://github.com/apache/airflow/issues/17686#issuecomment-931654295
The issue is the way you are defining the relationship.
This should work:
```python
date = set_date()
xcomm_task2(date)>>xcomm_task3(date)
```
Because xcomm_task2 needs data from set_date same as xcomm_task3
Anytime you call a task decorated function, you create a task.
The code below will create two different tasks from set_date:
```python
xcomm_task2(set_date())>>xcomm_task3(set_date())
```
That's why you have to assign the call to `set_date()` to a variable and
pass the data around so as to create the dependency that you want.
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