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Cronjob not working from user's crontab

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# 1  
Old 02-10-2011
Cronjob not working from user's crontab
Hi All,

I am trying to execute a python script from a user's crontab.

/home/user1/UDE/scripts/UdeManager.py

I am at /home/user1.

If I run the command "/home/user1UDE/scripts/UdeManager.py" from the users home directory its working fine.

But when I try to run from user's cron tab its giving some syntax errors.

crontab entry of the user1

Code:
*/1 * * * * /home/user1/UDE/scripts/UdeManager.py >> /tmp/2k.log1 2>&1

Error log from cron

Code:
Traceback (most recent call last):
  File "/home/user1/UDE/scripts/UdeManager.py", line 12, in ?
    import UdeUtilService
  File "/home/user1/UDE/scripts/UdeUtilService.py", line 164
    output = dict((str(k), [i[1] for i in outlst if i[0] == k]) for k in frozenset(j[0] for j in outlst))
                                                                  ^
SyntaxError: invalid syntax

Any help would be greatly appreciated.
Last edited by Tuxidow; 02-10-2011 at 05:56 AM..
# 2  
Old 02-10-2011
The environment variables, PATH variable, etc., are not the same in the cron job as they are for the user when he/she logs in.

It is analogous to the difference between
Code:
su user1

and
Code:
su - user1

# 3  
Old 02-10-2011
Quote:
import UdeUtilService
If that file is not in /home/user1 it is not going to be found.
First reaction is to specify the full path.
However because it works for user1 I would find out why it works, then compare the environment of the user to that of cron for that user.

Try comparing the output of "set" at the command prompt to the same command when run from a one-off cron. Particular attention to PYTHONPATH and more.

In the end you will probably need a shell wrapper to set enough environment variables to give Python the right environment.
# 4  
Old 02-11-2011
Issue:Python script was working fine from command line not from crontab
=================================================================
Reason: Environment variables are not set in cron
=================================================================
#Redirect the environment variables of the user to a file.
Code:
$env > /home/user1/.env_file

$vi /home/user1/.env_file

#type "export" each variable mentioned over there.

export HOME LD_LIBRARYPATH

$vi myscript.sh

#Add the following line

source ~/.env_file

-------------

#script details

--------------

Code:
$crontab -e

#Crontab entry

*/1 * * * * /home/user1/myscript.sh > /tmp/logfile1 1>&2

---------- Post updated at 12:48 AM ---------- Previous update was at 12:46 AM ----------

I found the solution myself. Thanks a lot for the comments. I've posted the steps followed for future reference.
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