The process pkgacct stalled while it ran for user “root”

Hi, I've been receiving this email for 2 weeks, everyday. I don't know what it exactly mean and how to solve it. The process "pkgacct - some users - av: 4 - write compressed stream" stalled while it ran for user "root". The process has run for "12 hours and 3.37 seconds". At the time that the system generated this notification, the process had a PID of "23276", and it consumed 0.45% of the system"s memory and 0.01% of the system"s CPU time. Thank you for your support.