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A java error and OS version is not much to go on to help you troubleshoot your Graylog server not starting. Maybe review these posts and work on being more descriptive about your environment and about the error you are having… as well as steps you have done to try to resolve it… read through these posts for help on what to post and tips on what to look at…
It’s flagging the literal string “:127.0.0.1:9000” in your server configuration. Did you prefix a IPv4 listen IP with a colon? Looks like it can’t parse it.
You could also post details from the service with the following command.
sudo systemsctl status graylog-server
You could post any relevant information from the graylog logs you are watching during startup with:
tail -f /var/log/graylog-server/server.log
NOTE: These are all things that are in the tips that make your question easier to answer. It would really be helpful if you read through the tips and were more forthcoming with your issue/environment.