This article is from a FAQ concerning SCO operating systems. While some of the information may be applicable to any OS, or any Unix or Linux OS, it may be specific to SCO Xenix, Open There is lots of Linux, Mac OS X and general Unix info elsewhere on this site: Search this site is the best way to find anything.
The only time I've seen this happen is when some very old interface scripts were copied up to a new version. I never took the time to look at the scripts to see why they weren't working, but apparently they'd hang for some reason, so lp would assume a printer fault, stop the job, wait a bit, and then send it again. And again, and again.. Replacing the interfaces with current versions fixed it instantly.
Got something to add? Send me email.