Execution of bash file with java file from crontab

Question

I wrote a bash file in which I am executing java file, its working properly if I am executing it but when I am trying with crontab it is not ,please help.

this is my crontab :

*/5 * * * * /home/import.sh >/dev/null 2>&1

this is my bash file:

                - me=$(date +%Y-%m-%d)
                mkdir -p  /home/importRequirement"$foldername"
                  {
                  java -jar ImportRequirement1.jar 
                  java -jar ImportRequirement1.jar 
                  }

         2>importRequirement"$foldername"/log$(date +%Y-%m-%d-%H-%M-%S).txt

I have deleted the url.

check your environment PATH. Does it include location of java command? — Manthan Tilva, May 20 '16 at 06:06
You probably need to include the absolute path to `java` and also the absolute path to the jar file to be executed. — Jim Garrison, May 20 '16 at 06:07
You should also add `/bin/bash` in the cronjob expression --> `*/5 * * * * /bin/bash /home/import.sh >/dev/null 2>&1` — fedorqui, May 20 '16 at 06:09
Also, define it is not working: does crontab work? You may want to go through [Debugging crontab](http://stackoverflow.com/tags/crontab/info). — fedorqui, May 20 '16 at 06:17

score 1 · Accepted Answer · answered May 20 '16 at 07:35

When a script is intended to be started from a non interactive environment (cron or init), none of the usual goodies such as custom path or other environment variable are set.

The rule is:

ensure all the commands (except at most those in /bin and /usr/bin) use full path
ensure all required environment variables are set

If you use many scripts that way, you could build a setenv script that declares all environment variables and create ones for every command you use. Here it will contain (more or less):

export JAVAHOME=...
export JAVA=/path/to/java

Then you can use in your script:

$(JAVA) -jar ImportRequirement1.jar

but here again you should either have a previous cd to the expected directory or use absolute path of jar

Thanks for discussing this issue, I could not imagine what's the problem in my code, this was the solution. — ktamas, Nov 01 '19 at 17:37

score 0 · Answer 2 · answered May 20 '16 at 07:09

The environment variables for cron jobs is not the same as what users get when they are logged in. Double check the environment variables you need to run your script (ie JAVA_HOME and PATH). cron might not know with what to interpret your script, you might want to place

#!/bin/bash

on the first line of your bash script.

Execution of bash file with java file from crontab

2 Answers2