Connect JMX with Zabbix

[sby]

Hi,

I have an issue and searching all day for a solution but cannot find.
I hope someone can help me with my issue Tomcat 8 cannot connect to Zabbix

CentOS 7
Zabbix server: 4.2.1
Zabbix Java Gateway runs on the Zabbix server.

Client server:
CentOS 7
Tomcat 8.5.35

When I want to connect from Zabbix to client-server I get the following error.

[root@zabbix scripts]# ./zabbix_get_java.sh localhost 10052 (ip) 9200 service:jmx:rmi:///jndi/rmi://(ip):9200/jmxrmi 'jmx["java.lang:type=Threading",ThreadCount]'
{"response":"failed","error":"Connection timed out: service:jmx:rmi:\/\/\/jndi\/rmi:\/\/(ip):9200\/jmxrmi"}

[root@zabbix scripts]# ./zabbix_get_jmx localhost 10052 (ip) 9200 'jmx["java.lang:type=Threading",ThreadCount]'
{"response":"failed","error":"No value for jmx_endpoint"}

I don't understand what I can do to fix this issue.

In my setenv.sh on the client-server I have:

CATALINA_OPTS="-Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=9200 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false"

When I check if the port is online on the client-server:

[root@cwh bin]# netstat -natp | grep 9200
tcp6 0 0 :::9200 :::* LISTEN 25808/java

What is wrong can someone help me, please.

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IMPORTANT info the Client-server is behind a NAT with local IP to public IP by the router.
Can that be the issue for this problem?


regards,

[drgr33n]

I don't normally access JMX like that over the cli and I'm not 100% what your script is doing but I did notice you're using 0.0.0.0 for the client IP. That should be the IP address of the target client.

10.10.0.2 (server) <--> 10.10.0.3 (client)

./zabbix_get_java.sh localhost 10052 10.10.0.3 9200 service:jmx:rmi:///jndi/rmi://10.10.0.3:9200/jmxrmi 'jmx["java.lang:type=Threading",ThreadCount]'

The syntax is
./zabbix_get_java.sh {server_ip} {discovery_port} {client_ip} {client_port} service:jmx:rmi:///jndi/rmi://{client_ip}:{client_port}/jmxrmi 'jmx[{mbean}'

[sby]

Hi, Thank you for your reaction.

This is not working I don't use 0.0.0.0 as IP, I have removed the real IP's.

When I do telnet from the Zabbix server to the server where the JMX is running then telnet works.

But I get no info from the JMX agent how can I solve it.