[#3598] - Oracle JDBC URL marked as incorrect

The JasperReports Server documentation specifies the following formats for a OJDBC URL:
(http://community.jaspersoft.com/wiki/connecting-jasperreports-server-you...)

Sample URL: jdbc:oracle:thin:@mydb_hostname.com:1521:your_db_instance_name
Sample URL: jdbc:oracle:thin:@remotehost:1521:orcl
Standard format: jdbc:oracle:thin:@//HOSTNAME[:PORT]/SERVICE

The Oracle documentation confirms this:
(http://docs.oracle.com/cd/E11882_01/appdev.112/e13995/oracle/jdbc/Oracle...)

However, whenever I specify the following URL (example):

jdbc:oracle:thin:@//ORATNSNO10731A:1521/NO10731A_RAC

I get the message "URL has invalid value". However, the connection works just fine whenever I test it.