The end-of-life date for this agent version is July 29, 2019. To update to the latest agent version, see Update the agent. For more information, see End-of-life policy.
Fix: In 2.21.0, calls to NewRelic class can cause NoClassDefFoundError
In 2.21.0, if your application calls the NewRelic class and does not include the newrelic-api.jar, the application would throw a NoClassDefFoundError. With this fix, the separate newrelic-api.jar is not required. However, it is recommended that your application include the newrelic-api.jar so that calls to the NewRelic API resolve with or without the agent installed.