[cups.general] Socket problem

[Michael R Sweet]

Phil Cowans wrote:
> I'm experiencing problems with CUPS locking up on our network. We have an HP LJ4000 on a JetDirect interface, using the foomatic hpijs driver (we want to be able to do PS->PCL conversion on the server for complex jobs). For some jobs (not necessarily particularly complex ones), the job is accepted but stays on the queue with very little happening. Closer inspection shows the socket://... process using close to 100% CPU. Attaching strace it appears to be looping on reads from the socket which return 0 bytes (EOF?).
> 
> Any ideas on how to solve this?

I've never seen that with our 4000, but then I've never bothered with
the Foomatic hpijs driver.  Try the original HP PPD file (you can find
it on cups.org) or the HP LaserJet Series driver that comes with CUPS.

More than likely the Foomatic driver is doing something that is
causing the HP to throw exceptions (but no data...)

Another possibility is that you have some bad network gear/cabling,
but try the alternate drivers first.

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Michael R Sweet                        Senior Printing System Engineer