[jira] [Comment Edited] (AIRFLOW-344) ImportError: No module named lockfile.pidlockfile

["Tim (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/AIRFLOW-344?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15421389#comment-15421389 ] 

Tim edited comment on AIRFLOW-344 at 8/15/16 6:07 PM:
------------------------------------------------------

I was using apt-get package manager for python-daemon. When switching to pip, the uninstall and reinstall worked.


was (Author: datsun80):
I was using apt-get packages manager for python-daemon. When switching to pip, the uninstall and reinstall worked.

> ImportError: No module named lockfile.pidlockfile
> -------------------------------------------------
>
>                 Key: AIRFLOW-344
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-344
>             Project: Apache Airflow
>          Issue Type: Bug
>            Reporter: Greg Reda
>
> When setting up a clean install of airflow on ubuntu 14.04, I ran into the following error:
> {code}
> vagrant@vagrant-ubuntu-trusty-64:~$ airflow
> [2016-07-19 15:37:41,839] {__init__.py:36} INFO - Using executor SequentialExecutor
> [2016-07-19 15:37:41,912] {driver.py:120} INFO - Generating grammar tables from /usr/lib/python2.7/lib2to3/Grammar.txt
> [2016-07-19 15:37:41,929] {driver.py:120} INFO - Generating grammar tables from /usr/lib/python2.7/lib2to3/PatternGrammar.txt
> Traceback (most recent call last):
>   File "/usr/local/bin/airflow", line 5, in <module>
>     from airflow.bin.cli import CLIFactory
>   File "/usr/local/lib/python2.7/dist-packages/airflow/bin/cli.py", line 17, in <module>
>     from daemon.pidfile import TimeoutPIDLockFile
>   File "/usr/local/lib/python2.7/dist-packages/daemon/pidfile.py", line 18, in <module>
>     from lockfile.pidlockfile import PIDLockFile
> ImportError: No module named lockfile.pidlockfile
> {code}
> This seems to be because Airflow includes python-daemon >= 2.1.1 as a dependency, but not lockfile. It seems that some time before 2.1.1 python-daemon removed TimeoutPIDLockFile and instead decided just to use lockfile.
> Uninstalling python-daemon and reinstalling fixed the issue, as python-daemon included a lockfile dependency.
> Not sure why PyPi wouldn't have pulled this down when resolving Airflow's python-daemon dependency, but figured I'd open this issue in case other run into it in the future. It might make sense for Airflow to explicitly require lockfile.



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