Mac OS X Server 10.2.3: CUPS Print Server Can Sometimes Prevent Queue Processing

In certain circumstances, especially in environments with high print volumes, a condition can occur that prevents the CUPS Print Server from processing queued print jobs.

Symptom

2. You may see an error such as this one in the CUPS error log:

W [15/Jan/2003:11:09:49 -0600] Possible DoS attack - more than 10 clients connecting from localhost!

Solution

cupsd.conf

/etc/cups/cupsd.conf

Old cupsd.conf file:

# # MaxClients: controls the maximum number of simultaneous clients that # will be handled. Defaults to 100. # # MaxClients 100

New cupsd.config file:

MaxClientsPerHost 100

2. Restart the server after making the changes to ensure all configuration files are properly read and all related services are properly started.