WAS tracing and log files
Use WebSphere Application Server log files and tracing to troubleshoot problems with WebSphere Portal.WAS has log files and a tracing function; however, whenever possible use the Installation Manager installation logs to determine whether WAS was successfully configured for WebSphere Portal and whether WebSphere Portal was successfully started on WAS. See http://www-10.lotus.com/ldd/portalwiki.nsf/dx/Installation_and_migration_logs_wp8.
If the are on the z/OS platform, IBM WAS for z/OS has log files and a tracing function. Some of the WAS for z/OS log files are located in the directory PROFILE_ROOT/logs. Furthermore, if you enable WAS for z/OS tracing, depending on option ras_trace_outputLocation, the job logs or log streams of the application server control and servant region contain information that might be helpful in detecting and diagnosing problems. Check the information center of WAS for z/OS for details on how to enable tracing and logging. For information, see Trace controls for IBM service.
Parent: Logging and tracing