matheusvasconcellos opened a new issue #10053:
URL: https://github.com/apache/airflow/issues/10053
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**Apache Airflow version**: 1.10
**Kubernetes version (if you are using kubernetes)** (use `kubectl version`):
**Environment**:
- **Cloud provider or hardware configuration**: AWS
- **OS** (e.g. from /etc/os-release):
NAME="Amazon Linux"
VERSION="2"
ID="amzn"
ID_LIKE="centos rhel fedora"
VERSION_ID="2"
PRETTY_NAME="Amazon Linux 2"
- **Kernel** (e.g. `uname -a`): 4.14.186-146.268.amzn2.x86_64 (Amazon Linux
2)
- **Install tools**: Pip
- **Others**:
**What happened**:
When setting the **force_log_out_after** variable to a number different from
the default 0, the error below is displayed when trying to login.
Other parameters that may be important:
**authenticate** = True
**auth_backend** = airflow.contrib.auth.backends.ldap_auth
```
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2446, in
wsgi_app
response = self.full_dispatch_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1951, in
full_dispatch_request
rv = self.handle_user_exception(e)
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1820, in
handle_user_exception
reraise(exc_type, exc_value, tb)
File "/usr/local/lib/python3.7/site-packages/flask/_compat.py", line 39,
in reraise
raise value
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 1947, in
full_dispatch_request
rv = self.preprocess_request()
File "/usr/local/lib/python3.7/site-packages/flask/app.py", line 2241, in
preprocess_request
rv = func()
File "/usr/local/lib/python3.7/site-packages/airflow/www/app.py", line
198, in before_request
flask.session.permanent = True
NameError: name 'flask' is not defined
```
<!-- (please include exact error messages if you can) -->
**What you expected to happen**:
The user session should be forced to log out after the set amount of time.
<!-- What do you think went wrong? -->
**How to reproduce it**:
Change the **force_log_out_after** from the default value.
**Anything else we need to know**:
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