Tcpip connection refused when used as service in raspbian

See more:

Java

TCP/IP

Raspberry-Pi

I have a jar file that listen to tcpip requests and send data accordingly. this jar file needs to run on a service in raspbian.

i've followed the instructions on this link

I've create sh file and put it in /usr/local/bin (Tourmaline.sh):

#!/bin/sh
SERVICE_NAME=Tourmaline
PATH_TO_JAR=/usr/local/bin/Tourmaline.jar
PID_PATH_NAME=/tmp/Tourmaline-pid
case $1 in
start)
echo "Starting $SERVICE_NAME ..."
if [ ! -f $PID_PATH_NAME ]; then
exec java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null &
echo $! > $PID_PATH_NAME
echo "$SERVICE_NAME started ..."
else
echo "$SERVICE_NAME is already running ..."
fi
;;
stop)
if [ -f $PID_PATH_NAME ]; then
PID=$(cat $PID_PATH_NAME);
echo "$SERVICE_NAME stoping ..."
kill $PID;
echo "$SERVICE_NAME stopped ..."
rm $PID_PATH_NAME
else
echo "$SERVICE_NAME is not running ..."
fi
;;
restart)
if [ -f $PID_PATH_NAME ]; then
PID=$(cat $PID_PATH_NAME);
echo "$SERVICE_NAME stopping ...";
kill $PID;
echo "$SERVICE_NAME stopped ...";
rm $PID_PATH_NAME
echo "$SERVICE_NAME starting ..."
nohup java -jar $PATH_TO_JAR /tmp 2>> /dev/null >> /dev/null &
echo $! > $PID_PATH_NAME
echo "$SERVICE_NAME started ..."
else
echo "$SERVICE_NAME is not running ..."
fi
;;
esac

when i run "sudo Tourmaline.sh start" on the terminal, the program starts to work and when i send a request i'm getting a response.

this was phase 1. next, i've created a service script and put it in /etc/systems/system (Tourmaline.service):

[Unit]
Description = Tourmaline
After= network.target

[Service]
Type = forking
ExecStart = /usr/local/bin/Tourmaline.sh start
ExecStop = /usr/local/bin/Tourmaline.sh stop
ExecReload = /usr/local/bin/Tourmaline.sh reload

[Install]
WantedBy=multi-user.target
I've enable the service using "sudo systemctl enable Tourmaline" and start it with "sudo systemctl start Tourmaline.service"

in the status i can see that the service started and active However, when i send a request i'n getting "connection refused" error i try to run "sudo Tourmaline.sh start" but it says

the program is already running (because the service started).



how can i make the service accepts connections?

What I have tried:

i used netstat -l to see used ports:
when i use Tourmaline.service no tcp is listenning
when i use Tourmaline.sh i'm getting tcp6 0 0 [::]:rtcm-sc104 [::]:* LISTEN