Click the Start a free trial link to start a 15-day SaaS trial of our product and join our community as a trial user. If you are an existing customer do not start a free trial.
AppDynamics customers and established members should click the sign in button to authenticate.
You can try the following from agent logs.
For Java Agents:(agent.*.log)
"INFO JavaAgent - Started AppDynamics Java Agent Successfully."
I was not able to find a stop message in agent logs for you, may be you should try to check your jvm sys out logs.
For Machine Agent: (machine-agent.log)
"INFO SystemAgent - Started AppDynamics Machine Agent Successfully."
"INFO SystemAgent - Machine Agent Stopped!"