Command airflow scheduler -p fails unexpectedly

Apache Airflow version: apache-airflow==1.10.14

Kubernetes version (if you are using kubernetes) (use kubectl version): None

Environment:

• Cloud provider or hardware configuration: x86
• OS (e.g. from /etc/os-release): Ubuntu 16.04.4 LTS
• Kernel (e.g. uname -a): Linux numba-linux64-gpu 4.4.0-87-generic #110-Ubuntu SMP Tue Jul 18 12:55:35 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux
• Install tools: pip
• Others: docker-compose

What happened:

The command airflow scheduler -p fails with an error message.

(base) root@d10c31496430:/# airflow scheduler -p
/ci_repo/airflow/airflow-ci/airflow_ci/ui.py:12: DeprecationWarning: get: Accessing configuration method 'get' directly from the configuration module is deprecated. Please access the configuration from the 'configuration.conf' object via 'conf.get'
  DASK_DASHBOARD = configuration.get('dask', 'dashboard')
/ci_repo/airflow/airflow-ci/airflow_ci/airflow_plugins.py:7: FutureWarning: Registering operators or sensors in plugins is deprecated -- these should be treated like 'plain' python modules, and imported normally in DAGs.
Airflow 2.0 has removed the ability to register these types in plugins. See <http://airflow.apache.org/docs/stable/howto/custom-operator.html>.
  class CIPlugin(AirflowPlugin):
Traceback (most recent call last):
  File "/opt/conda/bin/airflow", line 37, in <module>
    args.func(args)
  File "/opt/conda/lib/python3.7/site-packages/airflow/utils/cli.py", line 78, in wrapper
    metrics = _build_metrics(f.__name__, args[0])
  File "/opt/conda/lib/python3.7/site-packages/airflow/utils/cli.py", line 108, in _build_metrics
    full_command[idx + 1] = "*" * 8
IndexError: list assignment index out of range

What you expected to happen:

Expecting the flag -p to mean --do_pickle as per the command synopsis:

usage: airflow scheduler [-h] [-d DAG_ID] [-sd SUBDIR] [-r RUN_DURATION]
                         [-n NUM_RUNS] [-p] [--pid [PID]] [-D]
                         [--stdout STDOUT] [--stderr STDERR] [-l LOG_FILE]
optional arguments:
  -h, --help            show this help message and exit
  -d DAG_ID, --dag_id DAG_ID
                        The id of the dag to run
  -sd SUBDIR, --subdir SUBDIR
                        File location or directory from which to look for the
                        dag. Defaults to '[AIRFLOW_HOME]/dags' where
                        [AIRFLOW_HOME] is the value you set for 'AIRFLOW_HOME'
                        config you set in 'airflow.cfg'
  -r RUN_DURATION, --run-duration RUN_DURATION
                        Set number of seconds to execute before exiting
  -n NUM_RUNS, --num_runs NUM_RUNS
                        Set the number of runs to execute before exiting
  -p, --do_pickle       Attempt to pickle the DAG object to send over to the
                        workers, instead of letting workers run their version
                        of the code.
  --pid [PID]           PID file location
  -D, --daemon          Daemonize instead of running in the foreground
  --stdout STDOUT       Redirect stdout to this file
  --stderr STDERR       Redirect stderr to this file
  -l LOG_FILE, --log-file LOG_FILE
                        Location of the log file

What do you think went wrong?

This PR broke it: https://github.com/apache/airflow/pull/11468

After this PR the option -p is misinterpreted as --password.

The workaround is to use the long form --do_pickle.

How to reproduce it:

Run the mentioned command with the correct version of Airflow.

Anything else we need to know:

I have reported this via Slack and Marcos Marx asked me to open an issue about it.

[alexInhert]

also happens in Airflow 2.0

[potiuk]

Closing this then. Thanks @jens-scheffler-bosch for looking at it. we can always reopen or create a new issue if needed.