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Posted to commits@airflow.apache.org by "Brian Candler (JIRA)" <ji...@apache.org> on 2016/06/01 07:46:59 UTC
[jira] [Created] (AIRFLOW-200) Hiding import errors / missing
dependency on unicodecsv
Brian Candler created AIRFLOW-200:
-------------------------------------
Summary: Hiding import errors / missing dependency on unicodecsv
Key: AIRFLOW-200
URL: https://issues.apache.org/jira/browse/AIRFLOW-200
Project: Apache Airflow
Issue Type: Bug
Components: core
Affects Versions: Airflow 1.7.1.2
Environment: ubuntu 14.04 (python 2.7), new virtualenv, pip install airflow
Reporter: Brian Candler
Priority: Minor
When running the quickstart instructions at http://pythonhosted.org/airflow/start.html inside a clean virtualenv:
ERROR [airflow.models.DagBag] Failed to import:
/home/brian/airflow/venv/local/lib/python2.7/site-packages/airflow/example_dags/example_twitter_dag.py
Traceback (most recent call last):
File
"/home/brian/airflow/venv/local/lib/python2.7/site-packages/airflow/models.py",
line 247, in process_file
m = imp.load_source(mod_name, filepath)
File
"/home/brian/airflow/venv/local/lib/python2.7/site-packages/airflow/example_dags/example_twitter_dag.py",
line 26, in <module>
from airflow.operators import BashOperator, HiveOperator,
PythonOperator
ImportError: cannot import name HiveOperator
Unfortunately that message doesn't help diagnose the problem, which is being hidden by auto-import magic.
It requires manually probing imports from the true source modules:
>>> from airflow.operators.hive_operator import HiveOperator
...
ImportError: cannot import name HiveCliHook
>>> from airflow.hooks.hive_hooks import HiveCliHook
...
ImportError: No module named unicodecsv
Aha. "pip install unicodecsv" fixes the error.
So I'd suggest two issues:
1. Add a packaging dependency on unicodecsv to fix this particular problem
2. Fix the auto-import magic so that it doesn't suppress these errors
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