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From "Tim (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AIRFLOW-344) ImportError: No module named lockfile.pidlockfile
Date Mon, 15 Aug 2016 18:08:20 GMT

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

Tim commented on AIRFLOW-344:
-----------------------------

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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