Created question in FIWARE Q/A platform on 16-09-2019 at 02:09
Please, ANSWER this question AT https://stackoverflow.com/questions/57949092/cannot-start-cygnus-with-2-instances-as-a-service

Question:
Cannot start Cygnus with 2 instances as a service

Description:
I have configured 2 cygnus intances with their agents but when I start cygnus as a service I get the following error:

sudo service cygnus start
Starting cygnus (via systemctl): Job for cygnus.service failed because the control process exited with error code. See "systemctl status cygnus.service" and "journalctl -xe" for details.
[FAILED]

Also when I run the "systemctl status cygnus.service" command I get this output:

[root@orion conf]# systemctl status cygnus.service
● cygnus.service - SYSV: cygnus
Loaded: loaded (/etc/rc.d/init.d/cygnus; bad; vendor preset: disabled)
Active: failed (Result: exit-code) since Mon 2019-09-16 00:01:02 UTC; 18s ago
Docs: man:systemd-sysv-generator(8)
Process: 14719 ExecStart=/etc/rc.d/init.d/cygnus start (code=exited, status=2)

Sep 16 00:01:00 orion.novalocal cygnus[14719]: rm: cannot remove ‘/var/run/cygnus/cygnus_1.pid’: No such file or directory
Sep 16 00:01:00 orion.novalocal su[14766]: (to cygnus) root on none
Sep 16 00:01:00 orion.novalocal cygnus[14719]: Starting Cygnus test... bash: /var/run/cygnus/cygnus_test.pid: No such file or directory
Sep 16 00:01:02 orion.novalocal cygnus[14719]: cat: /var/run/cygnus/cygnus_test.pid: No such file or directory
Sep 16 00:01:02 orion.novalocal cygnus[14719]: [FAILED]
Sep 16 00:01:02 orion.novalocal cygnus[14719]: rm: cannot remove ‘/var/run/cygnus/cygnus_test.pid’: No such file or directory
Sep 16 00:01:02 orion.novalocal systemd[1]: cygnus.service: control process exited, code=exited status=2
Sep 16 00:01:02 orion.novalocal systemd[1]: Failed to start SYSV: cygnus.
Sep 16 00:01:02 orion.novalocal systemd[1]: Unit cygnus.service entered failed state.
Sep 16 00:01:02 orion.novalocal systemd[1]: cygnus.service failed.

There seems to be problem with the pid files at /var/run/cygnus/ path.
Also these are the 2 configured instances:
cygnus_instance_test.conf:

CYGNUS_USER=cygnus
CONFIG_FOLDER=/usr/cygnus/conf
CONFIG_FILE=/usr/cygnus/conf/agent_test.conf
AGENT_NAME=cygnus-ngsi
LOGFILE_NAME=cygnus.log
ADMIN_PORT=8081
POLLING_INTERVAL=30

cygnus_instance_1.conf:

CYGNUS_USER=cygnus
CONFIG_FOLDER=/usr/cygnus/conf
CONFIG_FILE=/usr/cygnus/conf/agent_1.conf
AGENT_NAME=cygnus-ngsi
LOGFILE_NAME=cygnus.log
ADMIN_PORT=8081
POLLING_INTERVAL=30