Tomcat via JMX: Cannot find host interface on <host_name> for item key "jmx..

[rp3000]

Hi,
anybody dealed with the following?

Cannot find host interface on <host_name> for item key "jmx["Catalina:type=GlobalRequestProcessor,name="{$PROT OCOL_HANDLER_AJP}"", bytesReceived]".

I have the following configuration:

Zabbix server (Appliance version) 4.0.2 on Ubuntu
Zabbix remote host with RedHat 7

Installed Agent remotely and started
Installed zabbix-java-gateway remotely and started
Instellad TomCat 9 remotely and started.

My wish would be to monitor Tomcat via JMX
I added the default tomcat template (Template App Apache Tomcat JMX) to the host but I receive the error like above.

Any clue, suggestions?

Thank you in advance

[Atsushi]

Have you added the JMX interface to the host settings?

https://www.zabbix.com/documentation/4.0/manual/config/items/itemtypes/jmx_monitoring#configuring_jmx_interfaces_and_items_in_zabbix_frontend

[rp3000]

yes I've done that, and that error don't appear anyome, but now I have communication problem with JMX, I will go to check the doors..

[rp3000]

Thank you but still navigating far from the coast..
I have some questions now? Where the java-gateway must run on zabbiz server or on the remote tomcat server?

Zabbix server is 192.168.93.133
Tomcat is 192.168.93.134

On the red JMX icon I have the following message: Connection refused (Connection refused): service:jmx:rmi:///jndi/rmi://192.168.93.134:10055/jmxrmi
I opened 10055 port on tomcat server but still don't work

JMX interface has values IP 192.168.93.134 and port is 10055

java_gateway now run on zabbix server with the following paramiters in conf file:

LISTEN_IP="192.168.93.133"
LISTEN_PORT=10055
PID_FILE="/var/run/zabbix/zabbix_java_gateway.pid"
START_POLLERS=5
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"

but the JMX icon is still red

[Atsushi]

Zabbix Java Gateway can be on a server running with Zabbix server or on another server. All that is necessary is that the Zabbix server and the Zabbix Java Gateway can communicate with each other and the JVM that made Zabbix Java Gateway and JMX accessible can communicate.

Have you set the following items in zabbix_server.conf?
- JavaGateway
- JavaGatewayPort
- StartJavaPollers

If Zabbix Java Gateway is running with Zabbix server, has it allowed to connect with the port number used for JMX monitoring in the Firewall setting on the server running Tomcat?

[rp3000]

Thank you guys,
Now the JMX icon has become green on remote host.
I understood that zabbix-server must communicate with java-gateway. This is running on the same zabbix-server. They communicate by port 10052. And JMX interfaces communicate on 12345...
But.
The Graphs show no data still. Of any parameter of tomcat templates. I'm testing the following 2 templates: the default one of Zabbix: "Template App Apache Tomcat JMX" and another one found on the net called: "Template JMX Tomcat 7".

[rp3000]

But there is a good news: I added a graph like in the example of the manual (Used Heap Memory) and I have the lines..

[rp3000]

How can I monitor other keys of Tomcat? I think the Used Heap Memory is not a tomcat tipical parameter..
Thank you in advance

Edit:
At the end the tomcat templates don't work.