Mockito is currently self-attaching to enable the inline-mock-maker. This will no longer work in future releases of the JDK. Please add Mockito as an agent to your build what is described in Mockito's documentation: https://javadoc.io/doc/org.mockito/mockito-core/latest/org/mockito/Mockito.html#0.3
WARNING: A Java agent has been loaded dynamically (/tmp/r/net/bytebuddy/byte-buddy-agent/1.15.4/byte-buddy-agent-1.15.4.jar)
WARNING: If a serviceability tool is in use, please run with -XX:+EnableDynamicAgentLoading to hide this warning
WARNING: If a serviceability tool is not in use, please run with -Djdk.instrument.traceUsage for more information
WARNING: Dynamic loading of agents will be disallowed by default in a future release
[main] INFO org.opendaylight.restconf.notifications.mdsal.SubscriptionStateService - Publishing subscription-terminated notification for ID: 2147483648 with error ID: example-error
[main] INFO org.opendaylight.restconf.notifications.mdsal.SubscriptionStateService - Publishing subscription-suspended notification for ID: 2147483648 with error ID: example-error
[main] INFO org.opendaylight.restconf.notifications.mdsal.SubscriptionStateService - Publishing subscription-resumed notification for ID: 2147483648
[main] INFO org.opendaylight.restconf.notifications.mdsal.SubscriptionStateService - Publishing subscription-completed notification for ID: 2147483648
[main] INFO org.opendaylight.restconf.notifications.mdsal.SubscriptionStateService - Publishing subscription modified notification for ID: 2147483648