AppDynamics switched from Semantic Versioning to Calendar Versioning starting in February 2020 for some agents and March 2020 for the entire product suite.

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    Verify That the Agent Process is Running

    Use the following command to verify that the agent process is running:


    ps -ef | grep machine


    1. Open a command line console.
    2. Start the Task Manager and click the Processes tab. 
    3. The agent process should be running. If it is not running, stop and then restart the agent.

    Resolve Agent Connectivity Problems

    Make sure you have configured the Controller IP address, Controller port number, and Account Access Key in the agent startup command, script or plist, or in the controller-info.xml file.  

    After configuring, restart the agent and check the behavior. Machine Agent log files may also provide troubleshooting information. 

    If you start the Machine Agent, and it cannot register with the Controller or associate with the same node in the Controller, then the stack trace may indicate the reason. 

    For example, the following message in the stack trace may indicate that the application, tier, and node information was not provided during the Machine Agent startup command or in the controller-info.xml file. 

    <execution-output>System agent 239590 not associated with application, metric registration request refused.</execution-output> 
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