Tomcat and JMX

[minimicro]

I'm trying to make a JMX connection. JMX is enabled on the client, if I telnet to the JMX port from Zabbix server, I have a connection.
By using another machine with jConsole, it works.
On the other hand in Zabbix, it remains in unknown status.

Do you have an idea ?

[tim.mooney]

Are you running the Zabbix Java Gateway somewhere? That functions as a type of "proxy". The Zabbix server needs to be able to communicate with the Zabbix Java Gateway, and the gateway needs to be able to communicate with your JMX client.

[minimicro]

No Zabbix Java Gatemay, just have Zabbix server run on virtual machine and Java JMX on another Virual Machine.

When i run jConsole on another Virtual machine, i'ts working very well.

[cyber]

You have to run zabbix java gateway to get data from JMX endpoints... https://www.zabbix.com/documentation.../concepts/java

[minimicro]

I run java gateway on server or on client ?

What IP do I put in the configuration file ? I put client IP.

I always have

ipclient:12345 Inconnu

on JMX for the client

[tim.mooney]

Cyber provided the link to the documentation for setting up the gateway.

In my environment, I have the Zabbix Java Gateway running on our Zabbix server, but in your environment you might want to put it on the client or possibly even on a different system that is not the Zabbix server or the client. As long as communication is allowed (firewall exceptions, if there are firewalls between any of the components) between Zabbix server and the Zabbix Java Gateway and also between Zabbix Java Gateway and the JMX port on the client, you can put the gateway software anywhere.

Just keep in mind the limitations that the documentation explains: you can only have one Java Gateway per Zabbix server or per Zabbix proxy.

[minimicro]

I installed Java Gateway on my client, it works but doesn't capture anything ...

2024-10-14 08:42:01.697 [main] INFO  com.zabbix.gateway.JavaGateway - Zabbix Java Gateway 7.0.4 (revision f383737f108) has started
2024-10-14 08:42:01.718 [main] INFO  com.zabbix.gateway.JavaGateway - listening on /51.xxx:10052

51.xxx it's the localhost.

[cyber]

Did you add java gw config to your proxy/server configuration, so it now knows how to turn to your GW? Did you configure hosts jmx interface in Zabbix, did you add jmx items to be checked ?

[minimicro]

I add GW config in zabbix_server.conf.
I configure host jmx interface for the client but stay in gray.

Another question, in file zabbix_java_gateway.conf i have LISTEN_IP (i put 127.0.0.1) and LISTEN_PORT (i put 10052), and

# uncomment to enable remote monitoring of the standard JMX objects on the Zabbix Java Gateway itself
JAVA_OPTIONS="$JAVA_OPTIONS -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=12345
        -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false
        -Dcom.sun.management.jmxremote.registry.ssl=false"

I uncomment this but what is port 12345 used for ?