Log file locations for middle tier in Apps 11i and R12

In Apps 11i, if you have to troubleshoot a problem with Apache, Jserv, JVM the directories to look for log files are:

$IAS_ORACLE_HOME/Apache/Apache/logs
$IAS_ORACLE_HOME/Apache/Jserv/logs
$IAS_ORACLE_HOME/Apache/Jserv/logs/jvm

In R12, the techstack has changed and you have Apache, OC4J and OPMN. These are the directories to look for log files:

$LOG_HOME/ora/10.1.3/Apache
$LOG_HOME/ora/10.1.3/j2ee
$LOG_HOME/ora/10.1.3/opmn