The diagnostics log file for WebCenter Portal is WC_Portal-diagnostic.log.

This log is available under the DOMAIN_HOME/servers/WC_Portal/logs directory.

Oracle WebCenter Portal log messages fall into these categories:

Out-of-bound conditions are also logged in managed server diagnostic logs so you can examine historical events at any time. Performance related messages are logged with the message ID prefix WCS-692<nn>and include the metric name, the value, and a message describing the metric that is out-of-bounds.

Here are some examples of messages that you might see in diagnostic logs for WebCenter Portal:

[WC_Portal] [WARNING] [WCS-69251] [oracle.webcenter.system-management] [tid:
 [ACTIVE].ExecuteThread: '4' for queue: 'weblogic.kernel.Default (self-tuning)']
 [userId: weblogic] [ecid:
 6356ef0164cbad47:3fe105c5:13b4e847973:-8000-0000000000000031,0] [APP:
 webcenter#11.1.1.4.0] [DSID: 0000JhEYRT^EgKG_Ix8Dyf1Ghz32000005]
 pageResponseTime: 22223 ms of PersonalSpace/Activities is out-of-bounds

[WC_Portal] [WARNING] [WCS-69252] [oracle.webcenter.system-management] [tid:
 oracle.webcenter.DefaultTimer] [ecid: 0000JhEX92mEgKG_Ix8Dyf1Ghz32000002,0] [APP: webcenter#11.1.1.4.0] 
wlsCpuUsage: 21.92100394175851 % of WebLogicServer is out-of-bounds

[WC_Portal] [WARNING] [WCS-69255] [oracle.webcenter.system-management] [tid:
 [ACTIVE].ExecuteThread: '0' for queue: 'weblogic.kernel.Default (self-tuning)']
 [userId: weblogic] [ecid:
 6356ef0164cbad47:3fe105c5:13b4e847973:-8000-0000000000000060,0] [APP:
 webcenter#11.1.1.4.0] [DSID: 0000JhEYRT^EgKG_Ix8Dyf1Ghz32000005]
 downloadThroughput: 11.63793103448276 KB/sec of 3209 is out-of-bound

[WC_Portal] [WARNING] [WCS-69253] [oracle.webcenter.system-management] [tid:
 pool-3-daemon-thread-1] [userId: weblogic] [ecid:
 6356ef0164cbad47:3fe105c5:13b4e847973:-8000-0000000000000088,0:16] [APP:
 webcenter#11.1.1.4.0] portletResponseTime: 20523 ms of Portlet: slowRenderingPortlet from Web Producer myPortlets is out-of-bounds

1. In Fusion Middleware Control, navigate to the home page for WebCenter Portal.

   See Navigating to the Home Page for WebCenter Portal.

2. From the WebCenter Portal menu, select Logs > Log Configuration.
3. In the Log Configuration page, in the Log Files tab, configure log settings.

To help developers debug WebCenter Portal assets, administrators can enable error messages with the calling stack to be displayed in the WebCenter Portal error page.

To enable error messages:

1. Connect to the WebCenter domain's Administration server using WLST.

2. Create a new folder (/tmp/WCconfig) on your local file system.

3. Export the webcenter-config.xml configuration file to the /tmp/WCconfig folder you created by running:

   exportMetadata(application='webcenter', server='WC_Portal', toLocation='/tmp/WCconfig', docs='/oracle/webcenter/webcenterapp/metadata/webcenter-config.xml')
   

4. Open the webcenter-config.xml file (in the /tmp/WCconfig/oracle/webcenter/webcenterapp/metadata) folder and change the showError-enable property to true to enable error messages:

   <webcenter:showError-enabled>true</webcenter:showError-enabled>
   

   or false to disable it:

   <webcenter:showError-enabled>false</webcenter:showError-enabled>
   

5. Save the file and import it back to the Administration server using the following WLST command:

   importMetadata(application='webcenter', server='WC_Portal',fromLocation='/tmp/WCconfig', docs='/oracle/webcenter/webcenterapp/metadata/webcenter-config.xml') 
   

   Note that you do not need to restart the Administration server for the change to take effect.