Apache error log

Hi,

on WLS 10.3.6

and WLS 12.2.1.4.0

Where is Apache error log?

What is its exact name?

I did:

grep ErrorLog httpd.conf

#  ErrorLog "logs/dummy-host.example.com-error_log"

# ErrorLog and LogLevel lines below and set OraLogMode to apache

#ErrorLog "|${ORACLE_HOME}/ohs/bin/rotatelogs ${ORACLE_INSTANCE}/diagnostics/logs/${COMPONENT_TYPE}/${COMPONENT_NAME}/error_log 86400"

But what are the values of ${ORACLE_INSTANCE} ${COMPONENT_TYPE} and ${COMPONENT_NAME}

I found :

 297 Jan 11 2007 /u01/appli/mysystem/fs2/EBSapps/10.1.2/Apache/Apache/logs/error_log.1168516800

But as you see it is too old.

Thanks.