The admin.conf file of the admin server is used to determine the location of the error log. By default, the admin.conf file will have the following.
With this configuration, the error log would be located at:
As the name implies, the admin_error.log will capture events classified as an error. Here is an example of an error in admin_error.log.
[Tue Mar 24 04:05:11.239998 2020] [:error] [pid 110535:tid 139637754234624] ac_util: Error changing Socket file owner, chgrp cmd error-> 1 [Tue Mar 24 04:05:11.240182 2020] [:error] [pid 110535:tid 139637754234624] ac_util: Severe error in Administration Server root process, Administration Server has been terminated [Tue Mar 24 04:05:11.240187 2020] [:error] [pid 110535:tid 139637754234624] ac_util: Administration Server must be started from root id