I have many computer that names with more than 15 characters.It should look like 'XXXX8SACNTRL01', but it looks like 'XXXX8SACNTRL0'. So last character looks missing.It's have same os.I looked hostnamectl, hostnamectl -a, 

dns server etc.Our machine naming standart like ASDFGSQL01,ASDFGSQL02,ASDFGSQL03 so when it came like ASDFGSQL0, other machines not came to approve machines. 

Sample Machine Names:

XXXXXXXINTPSQL02

XXXXXXXGLBPSQL03