Hello Kumar,
As you can see from the log, it seems that there is an exciting service running on port 443(which is the on Gluu server must use).
Make sure that port is unused before running the command `service gluu-server-3.1.3 start`.
To find out which service is using that port, run the below command:
```
# netstat -tulpn | grep 443
```
Thanks,
Gasmyr.