hi everybody,

I have a updated the crontab.

The aim of the update is to run a java program. I have written a shell script to run the program and this program has been added to the cron job to run it daily. If the program is called from the command line, it is working fine without any errors. But it is not working when executed from cron. But when I checked with the cron log, it is showing that the job has been run at the scheduled time. But i never found the output of the program.

I would be really thankful if anyone could help me with this.

Thank you,
bittus

cron runs with a different environment to your normal login shell. It could be that it can't find something in your path, or your JAVA_HOME settings, etc can't be found. Try outputting the results (stdout & stderr) to a file in /tmp or piping them to an email to find out where it's going wrong.

hi gilead,

Thank u for the update.

I tried outputting a msg(the msg is "Worked") to a file to check if the cron job executed successfully. i am getting outputs to the file. So its confirmed that cron is trying to execute the line.

Also that the cron job is executed as root. So for root user, the particular command is working fine !!!!

Outputting a message will demonstrate that the cron job is run but won't highlight what is missing. Have you tried using full paths to the commands being run, ie /usr/local/jdk/bin/java (or whatever your path is) instead of just java?

ok gilead, i ll do that and update u. Thank u so much for the immediate reply.

I appreciate your response.

/home/xxx/xxx.sh | echo "Worked" >> /xxx/temm.log

This is the entry in cron job. I am getting the file temm.log, updated at the scheduled time. But the shell script does not seem to work thru cron. Whereas it is working fine with the command prompt.

Hi All,


I was also facing similar issue and was able to execute java and mysql commands only from shell. Please try following if possible:


1- Create a .sh file and add java command to it with absolute path like:
/usr/local/java/bin/java TestJavaClassFile

2- Add .sh file entry with absolute path to crontab
*/30 * * * * /etc/test.sh

3- Change permission so everyone can execute .sh file
chmod 755 /etc/test.sh


Test it, hope this will help you

---------------------------------------------------------
Rakesh Rawat
rakeshrawatg@gmail.com

@bittus, we'd need to see the shell script. However as hinted above, the cron env is minimal to say the least, so you need to specify complete absolute paths for all cmds/progs and files used.
The script also needs to set (or source) any env variables used.