JMX: Tomcat only collecting metrics from one listener at a time

[tbm48813]

Component(s)

jmx-metrics

What happened?

Description

If Tomcat has two listeners configured, one HTTP and one HTTPS, it will only gather metrics from the HTTP listener.

Steps to Reproduce

Configure Tomcat with a HTTP and HTTPS listener. It will only pull metrics from HTTP unless you disable the HTTP listener, then it will then pull metrics from the HTTPS listener.

Expected Result

It should get metrics from all the listeners, which I verified is visible through JConsole.

Actual Result

It only gets metrics from the http listener.

Component version

JMX v0.96.0, Java Contrib v1.28.0

Log output

No response

Additional context

No response

[breedx-splk]

I would love to see the "Steps to Reproduce" expanded here, because "Configure Tomcat with a HTTP and HTTPS listener" sounds less than trivial. 😅

[per-lind]

Steps to reproduce:
Install tomcat with its default configuration file.
Create a certificate for use with the https listener openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -sha256 -days 365
Add or uncomment the example https listener in server.xml and change the certificate settings
<Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol" maxThreads="150" SSLEnabled="true"> <UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" /> <SSLHostConfig> <Certificate certificateFile="conf/cert.pem" certificateKeyFile="conf/key.pem" /> </SSLHostConfig> </Connector>

Have not tried but I would expect we would run into the same problem if we added 2 http listeners on different ports aswell.

[jefchien]

I think this is the same issue as #1360. It's only keeping the first MBean it gets and dropping the rest.