supervisord exiting with ENOEXEC - supervisord

Question

I am trying to run a java process with supervisord and am getting:
couldn't exec /var/application/start_tester: ENOEXEC
The contents of start_tester is:
java -Duser.dir=/var/application/ -cp /var/application/application.jar:/var/application/toepoke.jar com.application.Application
When I run the script from the console the app runs as expected. Here is my supervisor config
[program:application_tester]
directory=/var/application
command=/var/application/start_tester ; the program (relative uses PATH, can take args)
log_stdout=true ; if true, log program stdout (default true)
log_stderr=true ; if true, log program stderr (def false)
logfile=/var/log/application_tester.log
When I run the script from the console this is the output:
[root#monitor application]# ./start_tester
20131009 203657: application starting up.
20131009 203657 (33): version 2.2.3

Answer 1

Your file needs to be executable. So either:
You should chmod +x it to set the executable bit.
Put a shebang at the start of the file. Not having this is what caused the ENOEXEC.
or
Modify your config file to something like command=sh /var/application/start_tester.

Answer 2

In most cases a shebang is usually missing.
- #!/usr/bin/env bash
- #!/bin/bash
- #!/bin/sh
- #!/bin/sh -
Once you add the shebang to your gunicorn_start file (in case of DJANGO),
restart the supervisor
sudo systemctl enable supervisor
sudo systemctl restart supervisor