Problem

When going to http://servername:port/content/app you get a http 503 error.

The log file <mid-tier>/j2ee/OC4J_Content/application-deployments/content/OC4J_Content_default_island_1 has the following error message:

java.sql.SQLException: ORA-12705: invalid or unknown NLS parameter value specified

Solution

Change the IFS.SERVICE.JDBC.DriveType to thin for the Service Configuration you are using (default is SmallServiceConfiguration).

To do this log into EM for the mid-tier and go to Content, select Service Configurations at the bottom of the page and then select your service configuration.  Search for JDBC and change the value of IFS.SERVICE.JDBC.DriveType to thin.

Restart Content and try the website again.