Long module?

[Walt Thiessen]

I discovered this morning that MailScanner wasn't running on my 
WHM/Cpanel server. When I tried to restart it in the MailScanner 
front-end I got, "Redirecting to /bin/systemctl restart MailScanner.service
Job for MailScanner.service failed because the control process exited 
with error code. See 'systemctl status MailScanner.service' and 
'journalctl -xe' for details."

When I ran those two commands, I merely got info that says that 
MailScanner failed to start.

In /var/log/messages I found the following:

Jul  9 21:37:27 server MailScanner[31036]: Can't locate 
Sys/Hostname/Long.pm in @INC (you may need to install the 
Sys::Hostname::Long module) (@INC contains: 
/usr/mailscanner/usr/share/MailScanner/perl 
/usr/mailscanner/usr/share/MailScanner/perl /usr/local/cpanel 
/usr/local/cpanel/3rdparty/perl/528/lib/perl5/cpanel_lib/x86_64-linux-64int 
/usr/local/cpanel/3rdparty/perl/528/lib/perl5/cpanel_lib 
/usr/local/cpanel/3rdparty/perl/528/lib/perl5/5.28.0/x86_64-linux-64int 
/usr/local/cpanel/3rdparty/perl/528/lib/perl5/5.28.0 
/opt/cpanel/perl5/528/site_lib/x86_64-linux-64int 
/opt/cpanel/perl5/528/site_lib) at /usr/mailscanner/usr/sbin/MailScanner 
line 86.
Jul  9 21:37:27 server MailScanner[31036]: BEGIN failed--compilation 
aborted at /usr/mailscanner/usr/sbin/MailScanner line 86.
Jul  9 21:37:27 server MailScanner: Can't locate Sys/Hostname/Long.pm in 
@INC (you may need to install the Sys::Hostname::Long module) (@INC 
contains: /usr/mailscanner/usr/share/MailScanner/perl 
/usr/mailscanner/usr/share/MailScanner/perl /usr/local/cpanel 
/usr/local/cpanel/3rdparty/perl/528/lib/perl5/cpanel_lib/x86_64-linux-64int 
/usr/local/cpanel/3rdparty/perl/528/lib/perl5/cpanel_lib 
/usr/local/cpanel/3rdparty/perl/528/lib/perl5/5.28.0/x86_64-linux-64int 
/usr/local/cpanel/3rdparty/perl/528/lib/perl5/5.28.0 
/opt/cpanel/perl5/528/site_lib/x86_64-linux-64int 
/opt/cpanel/perl5/528/site_lib) at /usr/mailscanner/usr/sbin/MailScanner 
line 86.
Jul  9 21:37:27 server MailScanner: BEGIN failed--compilation aborted at 
/usr/mailscanner/usr/sbin/MailScanner line 86.
Jul  9 21:37:27 server systemd[1]: MailScanner.service: control process 
exited, code=exited status=2
Jul  9 21:37:27 server systemd: MailScanner.service: control process 
exited, code=exited status=2
Jul  9 21:37:27 server systemd[1]: Failed to start MailScanner AntiSpam 
and AntiVirus.

I noticed that there was a MailScanner upgrade from v3.16 to:v3.17 
available in my MailScanner front end, so I tried running that to see if 
it would clear the issue.

It did. MailScanner is now running again.

I don't really understand why this happened. Can anyone tell me why I 
needed to upgrade in order to get MailScanner running again? What is 
this "Long" perl module, why would it be gone, and why would it have to 
be reinstalled during the upgrade?

Walt