[cups.development] Printing data was lost while waiting for several minutes

[hao.chen at primax.com.cn]

Dear Sir,

I met one problem about printing data lost in Mac OS. Below is the  procedure:
  1. Empty the input tray. (So the job could not be printed immediately.)
  2. Print five jobs continuously until one printing job is hold at spooler (Job status is printing).
  3. Wait for about 10 minutes.
  4. Put papers in the input tray.

Some printers start to print jobs except the last job, and it still stays in spooler with printing status. For some others, the last printing job will be failed to print completely, for example, a half of page was printed out only, and there is some error strings.

After check the printing data in our own printer, that looks like some data was lost. Is it a CUPS issue?

Thanks!
Horky
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