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Apple CUPS Sources
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Cups silently pauses, needs to be prodded to continue printing #3823

Closed michaelrsweet closed 13 years ago

michaelrsweet commented 13 years ago

Version: 1.4.5 CUPS.org User: kernel.pkts

We have a Zebra label printer, that prints barcodes using the ZPL (Zebra printing language). It's accessible via tcp/ip, by connecting to port 9100 (the normal jetdirect socket). We have cups running on an XServe running SnowLeopard. Jobs are submitted through a web page which calls 'lpr -PZebra_Technologies_ZTC_GX430t -o raw' with the data.

The printer operates normally 99% of the time, but occasionally print jobs stop being printed and build up in the queue. We've tried:

  1. Telnetting to the printer (port 23 has a basic control panel) and resetting the printer from the menu.
  2. Power cycling the printer.
  3. Checking cups.

According to Cups, the printer is fine, and jobs are queued, ready to print. At this point, I paused the queue, and then resumed the queue, and suddenly the printer started printing again, emptying the queue. No errors or warnings appeared in the logs. The printer printed a job earlier in the day.

The next time this happens, I'll try to do some tcpdump packet capturing, dtruss, etc, etc, but this bug report may time out before that happens, as we print infrequently.

michaelrsweet commented 13 years ago

CUPS.org User: mike

We've had a couple reports of issues with Zebra label printers and port 9100 printing recently. You can try using LPD instead for submission to see if that helps (it has for the other reporters), but otherwise we'll definitely need to see a packet trace, lsof output for the cupsd process, and the /var/log/cups/error_log file (run "cupsctl --debug-logging" in a Terminal window to enable debug logging please)...

michaelrsweet commented 13 years ago

CUPS.org User: mike

This STR has not been updated by the submitter for two or more weeks and has been closed as required by the CUPS Configuration Management Plan. If the issue still requires resolution, please re-submit a new STR.