I get the following error message:

/usr/bin/lpr: Too many active jobs.

and nothing prints

I can hit Cancel and then it starts working again

How should I proceed?

1

1 Answer

CUPS may be using one the builtin resource usage limitations. These could be compiled-in default values, or explicitely set ones which you can both change/override in /etc/cups/cupsd.conf.

You should check for the following values in /etc/cups/cupsd.conf:

 FilterLimit MaxClients MaxClientsPerHost MaxJobs MaxJobsPerPrinter MaxJobsPerUser

Look up the meaning of each of these settings by reading 'man cupsd.conf'.

My guess is that by setting

 MaxClients 100 MaxClientsPerHost 10 MaxJobs 1000 MaxJobsPerUser 500 MaxJobsPerPrinter 500 MaxJobsPerClient 500

will go a long way to solve your immediate problem. But you still should investigate, why the default values do not work for your system (unless someone, for some reason, changed them some time ago to very low values).

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