LOGS location oracle Ebs

Log file location for Oracle E-Business Suite R12

Below list of  log file locations could be helpful for your issue:

 Apache, OC4J and OPMN:
$LOG_HOME/ora/10.1.3/Apache
$LOG_HOME/ora/10.1.3/j2ee
$LOG_HOME/ora/10.1.3/opmn

 Startup/Shutdown Log files:
$INST_TOP/logs/appl/admin/log

 Patch log:
$APPL_TOP/admin/$SID/log/

 Autoconfig log file:

Apps:
$INST_TOP/apps/$CONTEXT_NAME/admin/log/$MMDDHHMM/adconfig.log

Db:
$ORACLE_HOME/appsutil/log/$CONTEXT_NAME/<MMDDHHMM>/adconfig.log
$ORACLE_HOME/appsutil/log/$CONTEXT_NAME/<MMDDHHMM>/NetServiceHandler.log

 Concurrent log:
$INST_TOP/apps/$CONTEXT_NAME/logs/appl/conc/log

 Clone log:
Preclone log files in source instance

Apps:
$INST_TOP/apps/$CONTEXT_NAME/admin/log/ (StageAppsTier_MMDDHHMM.log)

Db:
$ORACLE_HOME/appsutil/log/$CONTEXT_NAME/(StageDBTier_MMDDHHMM.log)
Clone log files in target instance

Apps :
$INST_TOP/apps/$CONTEXT_NAME/admin/log/ApplyAppsTier_<time>.log
Db:
$ORACLE_HOME/appsutil/log/$CONTEXT_NAME/ApplyDBTier_<time>.log

 Alert Log File:
$ORACLE_HOME/admin/$CONTEXT_NAME/bdump/alert_$SID.log

Reference:
How to find location of Install, Autoconfig, Patching , Clone and other logs in R12 [ID 804603.1]
Oracle Application Server Diagnostic Tools and Log Files in Applications Release 12 [ID 454178.1]
Oracle Applications System Administrator’s Guide