Ubuntu version: 19.10
cups version: 2.2.12-2ubuntu1
cupsd process slowly increases memory consumption. The /var/log/cups/error_log is full of errors below:
E [22/Jan/2020:11:06:17 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:19 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:20 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:21 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:22 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:24 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:25 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:26 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:28 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:29 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:30 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:32 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
E [22/Jan/2020:11:06:33 +0100] [Client 6] Returning IPP client-error-bad-request for CUPS-Add-Modify-Printer (ipp://localhost:631/printers/HP_LaserJet_Professional_P1606dn) from localhost.
Status changed to 'Confirmed' because the bug affects multiple users.