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8.8. Manually Upgrading the JBoss ON Agent

To ensure compatibility with the JBoss ON server, each agent must be upgraded to the same version of JBoss ON as the server.
Agents have the ability to auto-update themselves. So, under most conditions, it isn't necessary to manually upgrade agents. However, if the auto-update fails for some reason or you disabled agent auto-update, then the agent can be upgraded manually.

Note

All agents must be upgraded at the same time. Having agents of different versions is not supported.
  1. Shut down the JBoss ON agent.
  2. Windows only.. If the agent is running as a Windows service, uninstall the Windows service: 
    cd old-agent-install-dir/bin
./rhq-agent-wrapper.bat remove
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  3. Upgrade the JBoss ON server, as in Section 3.8.1, “Upgrading the JBoss ON Server”. The JBoss ON server must be upgraded before any agents are upgraded.
  4. Restart the upgraded JBoss ON servers if they are not yet started.
  5. Download the agent update binary from the server.
  6. Copy the agent update binary JAR file into the parent directory where the agent is installed. For example: 
    cp agent-update-binary.jar /opt/rhq-agent
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  7. Extract the new JBoss ON agent from the agent update binary by running the following command: 
    java -jar agent-update-binary.jar --update=agent_installation_directory
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    This will tell the agent update binary to extract the JBoss ON agent distribution and update the current agent that is found in rhq-agent subdirectory. At this point, the upgraded JBoss ON agent is located in the original rhq-agent directory. The old agent has been backed up to the rhq-agent-old directory. Any upgrade errors are written to the agent's log files.
  8. Finally, start the JBoss ON agent.
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