Symptom

Printing to HP MFP1217nfw fails with “Filter failed”. No useful information in CUPS logs even at LogLevel debug. Message found in /var/log/daemon.log:

Jul 31 13:03:10 malaussene hpcups[3083]: common/utils.c 130: validate_plugin_version() Plugin version[3.14.6] mismatch with HPLIP version[3.16.11]
Jul 31 13:03:10 malaussene hpcups[3083]: common/utils.c 157: Plugin version is not matching

Probable cause

Upgrade of HPLIP Debian packages without corresponding (manual) update of the proprietary/binary plugin.

Fix

Upgrading the plugin using:

# hp-plugin

proved effective.