- Do you have a postgres database running ?
- Do you have a database for Libresource. (Same name as the one given in the file JONAS_ROOT/conf/libresourceDS.properties)
- The version of the SQL driver might not be uptodate regarding your database. (replace the jar file in JONAS_ROOT/lib/ext/ by the proper one available here : http://jdbc.postgresql.org/download.html)
- If you still have an error, please send the full stack trace.
=> And, you don't have to create the file manually…