Run java process at boot and autorun at death

Question

I have two requirements for my Java application. If he dies, restart him. If the server restarts, reboot it is simple enough. Using the answer here I have a script that will restart when the java application dies.

#! / bin / bash

until java -Xms256m -Xmx768m -jar MyApp.jar; do
    echo "MyApp crashed with exit code $ ?. Respawning ..."> & 2
    sleep 5
done

I can run this with "nohup restart_script.sh &" and it will work all day without any problems. Now for the launch requirement. I took the /etc/init.d/crond script and replaced the crond binary with my script, but it crashes at startup.

#! / bin / bash
#
# Init file for my application.
#
. /etc/init.d/functions

MYAPP = restart_script.sh
PID_FILE = / var / run / myapp.pid

start () {
        echo -n "Starting My App"
        daemon --user appuser $ MYAPP
        RETVAL = $?
        echo
        [$ RETVAL -eq 0] && touch / var / lock / subsys / myapp
        return $ RETVAL
}

stop () {
        echo -n "Stopping my application"
        killproc $ MYAPP
        RETVAL = $?
        echo
        [$ RETVAL -eq 0] && rm -f / var / lock / subsys / myapp
        return $ RETVAL
}

...

case "$ 1" in
    start)
        start
        ;;
    stop)
        stop
        ;;
...
esac

When I run / sbin / service myapp, the script runs, but the console hangs. I tried "daemon --user appuser nohup $ MYAPP &" and I immediately return to the prompt without specifying [OK], and when I do ps, I still see init hanging. Any ideas on how to call the script in the init script and return it correctly?

Thank,

Greg

Answer 1

( RedHat) , . , , script .

:

#!/bin/bash

(
    until java -Xms256m -Xmx768m -jar MyApp.jar; do
        echo "MyApp crashed with exit code $?.  Respawning... " >&2
        sleep 5
    done
) &

. , . , , .

Answer 2

java, ... tanuki
, , .