Could not list the agent in the gocd-server console

[Vikash Kumar Jha]

Hi Team

I am getting the following error message in go-agent-stderr.log. 

2020-12-28 12:55:48,552 - Could not find file `config/agent-logback.xml'. Attempting to load from classpath.

2020-12-28 12:55:48,552 - Using classpath resource `jar:onejar:lib/agent-20.10.0-12356-classes.jar!/config/agent-logback.xml'.

2020-12-28 12:55:52,972 - WARNING: An illegal reflective access operation has occurred

2020-12-28 12:55:52,972 - WARNING: Illegal reflective access by org.apache.felix.framework.ext.ClassPathExtenderFactory$DefaultClassLoaderExtender (onejar:lib/org.apache.felix.framework-5.6.10.jar) to method java.net.URLClassLoader.addURL(java.net.URL)

2020-12-28 12:55:52,972 - WARNING: Please consider reporting this to the maintainers of org.apache.felix.framework.ext.ClassPathExtenderFactory$DefaultClassLoaderExtender

2020-12-28 12:55:52,972 - WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations

2020-12-28 12:55:52,972 - WARNING: All illegal access operations will be denied in a future release

[Vikash Kumar Jha]

Also in the go-agent.log, i am seeing this error:

      at java.base/java.lang.Thread.run(Unknown Source)

Caused by: org.apache.http.client.ClientProtocolException: The server returned status code 403. Possible reasons include:

   - This agent has been deleted from the configuration

   - This agent is pending approval

   - There is possibly a reverse proxy (or load balancer) that has been misconfigured. See https://docs.gocd.org/20.10.0/installation/configure-reverse-proxy.html#agents-and-reverse-proxies for details.

[Vikash Kumar Jha]

After re-installing the agent, the issue was resolved.