There are several restrictions regarding the DP Cell Manager hostname and the domain name components.
If these restrictions are not minded, there will be issues with the certificate creation and the DP Application Server. These restrictions are valid for DP 9 and 10. For DP 9, issues have only been visible wihen using the advanced scheduler. For DP 10, these issues will affect a wider range of the product.
Not all of these restrictions are intercepted during the installation, they need to be checked manually before installing the product or updating it.
The first character of a hostname or domain component must be letter.
A hostname or domain components must not consist of a single character.
Certificate generation is done by the Oracle Java Security Tools (which we use inside DP). The Oracle Java Security Tools insists on strict follow of RFC 952 standard when checking for host names and domain components. The RFC 952 insists that the first character of hostname and every domain component must be letter and that the domain components do not consist of a single character. This is changed in RFC 1123. There is already a request to relax the hostname handling in Oracle Java Tools to comply with the RFC 1123, but it is not resolved yet: http://bugs.java.com/bugdatabase/view_bug.do?bug_id=8054380
Hostnames may not contain other special characters than a minus sign (-)
As described in RFC-0952, host names may only consist of: A "name" (Net, Host, Gateway, or Domain name) is a text string up to 24 characters drawn from the alphabet (A-Z), digits (0-9), minus sign (-), and period (.). Note that periods are only allowed when they serve to delimit components of "domain style names".https://www.rfc-editor.org/rfc/rfc952.txt
Hostname longer than 15 characters:
Windows does not permit computer names that exceed 15 characters.
In case you encounter one of these hostnames for your DP Cell Manager, consult support.
Do not install the product or update it!