Monitoring JMX items

Let's create a separate host for JMX monitoring:

1. Navigate to Configuration | Hosts and click on Create host
2. Enter Zabbix Java gateway in the Host name field, clear everything in the Groups box, enter Java in the Groups field, and then select Java (new)
3. Remove the default agent interface and click on Add next to JMX interfaces

In our case, the gateway is running on the localhost, so we can leave the IP address as the default, 127.0.0.1. But what about the port? We had the Java gateway listen on 10052, but then there was also port 12345 in the startup.sh script. If any confusion arises, we should think about which functionality is available on each of these ports. On port 10052, we had the gateway itself, which was the port Zabbix server connects to. We already saw this port set in the server configuration file. Normally, the gateway would then connect...