How to find log files locations in 11i and R12

The following log files location could help you to find-out issues and errors from your application 11i instance.

Database Tier Logs are

Alert Log File location:

$ORACLE_HOME/admin/$CONTEXT_NAME/bdump/alert_$SID.log

Trace file location:

$ORACLE_HOME/admin/SID_Hostname/udump

Application Tier Logs

Start/Stop script log files location:

$COMMON_TOP/admin/log/CONTEXT_NAME/ 

OPMN log file location

$ORACLE_HOME/opmn/logs/ipm.log

Apache, Jserv, JVM log files locations:

$IAS_ORACLE_HOME/Apache/Apache/logs/ssl_engine_log

$IAS_ORACLE_HOME/Apache/Apache/logs/ssl_request_log

$IAS_ORACLE_HOME/Apache/Apache/logs/access_log

$IAS_ORACLE_HOME/Apache/Apache/logs/error_log

$IAS_ORACLE_HOME/Apache/JServ/logs

Concurrent log file location:

$APPL_TOP/admin/PROD/log or $APPLLOG/$APPLCSF

Patch log file location:

$APPL_TOP/admin/PROD/log

Worker Log file location:

$APPL_TOP/admin/PROD/log

AutoConfig log files location:

Application Tier:

$APPL_TOP/admin/SID_Hostname/log//DDMMTime/adconfig.log

Database Tier:

$ORACLE_HOME/appsutil/log/SID_Hostname/DDMMTime/adconfig.log

Error log file location:

Application Tier:

$APPL_TOP/admin/PROD/log

Database Tier :

$ORACLE_HOME/appsutil/log/SID_Hostname

In Oracle Applications R12, the log files are located in $LOG_HOME (which translates to $INST_TOP/logs)

Below list of log file locations could be helpful for you:

Concurrent Reqeust related logs

$LOG_HOME/appl/conc - > location for concurrent requests log and out files

$LOG_HOME/appl/admin - > location for mid tier startup scripts log files

Apache Logs (10.1.3 Oracle Home which is equivalent to iAS Oracle Home - Apache, OC4J and OPMN)

$LOG_HOME/ora/10.1.3/Apache - > Location for Apache Error and Access log files

$LOG_HOME/ora/10.1.3/j2ee - > location for j2ee related log files

$LOG_HOME/ora/10.1.3/opmn - > location for opmn related log files

Forms & Reports related logs (10.1.2 Oracle home which is equivalent to 806 Oracle Home)

$LOG_HOME/ora/10.1.2/forms

$LOG_HOME/ora/10.1.2/reports

Startup/Shutdown Log files location:

$INST_TOP/apps/$CONTEXT_NAME/logs/appl/admin/log

Patch log files location:

$APPL_TOP/admin/$SID/log/ 

Clone and AutoConfig log files location in Oracle E-Business Suite Release 12 

Logs for the adpreclone.pl are located: 

On the database tier: 

RDBMS $ORACLE_HOME/appsutil/log/< context >/StageDBTier_< timestamp >.log 

On the application tier: 

$INST_TOP/admin/log/StageAppsTier_< timestamp >.log 

Where the logs for the admkappsutil.pl are located? 

On the application tier: 

$INST_TOP/admin/log/MakeAppsUtil_< timestamp >.log 

Logs for the adcfgclone.pl are located:

On the database tier: 

RDBMS $ORACLE_HOME/appsutil/log/< context >/ApplyDBTier_< timestamp >.log 

On the application tier: 

$INST_TOP/admin/log/ApplyAppsTier_< timestamp >.log 

. 

Logs for the adconfig are located: 

On the database tier: 

RDBMS $ORACLE_HOME/appsutil/log/< context >/< timestamp >/adconfig.log 

RDBMS $ORACLE_HOME/appsutil/log/< context >/< timestamp >/NetServiceHandler.log 

On the application tier: 

$INST_TOP/admin/log/< timestamp >/adconfig.log 

$INST_TOP/admin/log/< timestamp >/NetServiceHandler.log