hrkh opened a new issue #13481:
URL: https://github.com/apache/airflow/issues/13481
**Apache Airflow version**: 1.10.12
**Environment**:
- **Cloud provider or hardware configuration**: Google Cloud (Cloud Composer)
- **OS** (e.g. from /etc/os-release): Ubuntu 18.04.5 LTS
- **Kernel** (e.g. `uname -a`): x86_64 GNU/Linux
- **Install tools**:
- **Others**:
- apache-airflow-backport-providers-amazon version: '2020.10.29'
**What happened**:
When I tried to execute S3KeyUnchangedSensor, I got the following error.
```
sensor = S3KeysUnchangedSensor(
task_id="sensor",
poke_interval=30,
mode="poke",
bucket_name="{{ var.value.s3_bucket }}",
prefix="hogehoge",
inactivity_period=60 * 2,
allow_delete=False,
dag=dag,
)
```
```
Traceback (most recent call last):
File "/usr/local/lib/airflow/airflow/models/taskinstance.py", line 966, in
_run_raw_task
self.render_templates(context=context)
File "/usr/local/lib/airflow/airflow/models/taskinstance.py", line 1428,
in render_templates
self.task.render_template_fields(context)
File "/usr/local/lib/airflow/airflow/models/baseoperator.py", line 706, in
render_template_fields
self._do_render_template_fields(self, self.template_fields, context,
jinja_env, set())
File "/usr/local/lib/airflow/airflow/models/baseoperator.py", line 711, in
_do_render_template_fields
content = getattr(parent, attr_name)
AttributeError: 'S3KeysUnchangedSensor' object has no attribute 'bucket_name'
```
**What you expected to happen**:
I expected the sensor to run successfully.
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