Agent should not depend on java.rmi module

[axelfontaine]

Description

On a small JRE created with JDeps I get

Unable to start New Relic Agent. Please remove -javaagent from your startup arguments and contact New Relic support.
java.lang.NoClassDefFoundError: java/rmi/UnexpectedException
        at com.newrelic.agent.RPMServiceManagerImpl.createRPMService(RPMServiceManagerImpl.java:174)
        at com.newrelic.agent.RPMServiceManagerImpl.<init>(RPMServiceManagerImpl.java:78)
        at com.newrelic.agent.service.ServiceManagerImpl.doStart(ServiceManagerImpl.java:258)
        at com.newrelic.agent.service.AbstractService.start(AbstractService.java:63)
        at com.newrelic.agent.Agent.continuePremain(Agent.java:176)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
        at java.base/java.lang.reflect.Method.invoke(Unknown Source)
        at com.newrelic.bootstrap.BootstrapAgent.startAgent(BootstrapAgent.java:175)
        at com.newrelic.bootstrap.BootstrapAgent.premain(BootstrapAgent.java:117)
        at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(Unknown Source)
        at java.base/java.lang.reflect.Method.invoke(Unknown Source)
        at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndStartAgent(Unknown Source)
        at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndCallPremain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: java.rmi.UnexpectedException
        at java.base/java.net.URLClassLoader.findClass(Unknown Source)
        at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
        at java.base/java.lang.ClassLoader.loadClass(Unknown Source)
        ... 13 more

Expected Behavior

Agent works without the java.rmi JDK module

Troubleshooting or NR Diag results

See above

Steps to Reproduce

Create a JRE with these modules:

java.base, java.compiler, java.datatransfer, java.desktop, java.instrument, java.logging, java.management, java.naming, java.net.http, java.prefs, java.security.sasl, java.sql, java.transaction.xa, java.xml, jdk.management, jdk.unsupported

and start the agent

Your Environment

Java 23

Additional context

The issue is this line:

newrelic-java-agent/newrelic-agent/src/main/java/com/newrelic/agent/RPMService.java

Line 54 in 5e745ea

import java.rmi.UnexpectedException;

Where an RMI exception is being abused instead of using a custom one.

[workato-integration]

https://new-relic.atlassian.net/browse/NR-366674

[meiao]

There are 3 places where this exception is being thrown. One on RPMService and two on DataSenderImpl.
Indeed it would be better to send a more appropriate exception.