[Samba] Print jobs hang in Samba, don't go to UNIX spooler

[Windsor Dave (AdW/MOE2.1)]

I have encountered a strange printing problem with Samba 2.2.4 running under

HP-UX 11i.

In the process of investigating a printing problem, I have found that Samba
has stopped passing jobs along to the UNIX lp spooler as of yesterday
afternoon.
When NT/W2K clients print to printers on my server, the jobs are accepted,
Samba
spool files are created in the spool directory defined for the printer (with
names such as smbprn.005594.a14088), but they never actually get printed.
The
UNIX spooler is working OK, since I can issue an "lp" command from a shell
prompt and get a printout.  Printing was working fine until just after lunch
yesterday.  Nothing has changed in the Samba or system configuration of
which
I am aware.  Does anyone know what might cause this?  I would like to find
some
way to restart printing without taking all the smbd processes down, because
doing
so would mean stopping production lines (we're a manufacturing facility).

Thanks for any help you can provide!

Best regards, 

Dave Windsor
AdW/MOE2.12
Team Leader, Test Systems Engineering
Robert Bosch Corporation
Anderson, SC, USA