int3rlop3r opened a new issue #19365:
URL: https://github.com/apache/airflow/issues/19365
### Apache Airflow version
2.2.1 (latest released)
### Operating System
Ubuntu (16.04)
### Versions of Apache Airflow Providers
apache-airflow-providers-celery==2.1.0
apache-airflow-providers-ftp==2.0.1
apache-airflow-providers-http==2.0.1
apache-airflow-providers-imap==2.0.1
apache-airflow-providers-sqlite==2.0.1
### Deployment
Virtualenv installation
### Deployment details
_No response_
### What happened
Got an error while running `$ airflow standalone`.
Stacktrace:
webserver | [2021-11-02 16:59:56 +0530] [15195] [INFO] Booting worker with
pid: 15195
Traceback (most recent call last):
File "/home/jonathan/programs/venv/bin/airflow", line 8, in <module>
sys.exit(main())
File
"/home/jonathan/programs/venv/lib/python3.6/site-packages/airflow/__main__.py",
line 48, in main
args.func(args)
File
"/home/jonathan/programs/venv/lib/python3.6/site-packages/airflow/cli/cli_parser.py",
line 48, in command
return func(*args, **kwargs)
File
"/home/jonathan/programs/venv/lib/python3.6/site-packages/airflow/cli/commands/standalone_command.py",
line 48, in entrypoint
StandaloneCommand().run()
File
"/home/jonathan/programs/venv/lib/python3.6/site-packages/airflow/cli/commands/standalone_command.py",
line 95, in run
if not self.ready_time and self.is_ready():
File
"/home/jonathan/programs/venv/lib/python3.6/site-packages/airflow/cli/commands/standalone_command.py",
line 209, in is_ready
return self.port_open(8080) and self.job_running(SchedulerJob) and
self.job_running(TriggererJob)
File
"/home/jonathan/programs/venv/lib/python3.6/site-packages/airflow/cli/commands/standalone_command.py",
line 231, in job_running
return job.most_recent_job().is_alive()
AttributeError: 'NoneType' object has no attribute 'is_alive'
### What you expected to happen
I expect the server to start without any errors or stacktraces.
### How to reproduce
Follow the installation instructions in the docs and then run `$ airflow
standalone`.
### Anything else
_No response_
### Are you willing to submit PR?
- [X] Yes I am willing to submit a PR!
### Code of Conduct
- [X] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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