[Mimedefang] Bayes locking

[Button, Shawn]

 After upgrading to the latest mimedefang and SA, we now see on a
regular basis the bayes files being locked. It appears to not affect
mail delivery, and sometimes it will go away after a while. We have
pretty decent hardware and not a huge system load with mail so I am
perplexed...but it is filling up our log file. Any suggestions would be
appreciated...thank you kindly. When googling on it, most items I saw
were that it was usually temporary due to system load. This particular
incident has been going on for a few hours. We often send large CAD
attachments, would that cause the issue?

Oct  6 08:04:36 oslo mimedefang-multiplexor[1100]: Slave 0 stderr:
Cannot open bayes databases /var/spool/SA-MIMEDefang/bayes_* R/W: lock
failed: File exists 

Oct  6 08:06:37 oslo mimedefang[11499]: Error from multiplexor: ERR
Filter timed out - check filter rules or system load
Oct  6 08:06:37 oslo mimedefang-multiplexor[1100]: Slave 0 resource
usage: req=17, scans=17, user=39.320, sys=1.360, nswap=0, majflt=12278,
minflt=73720, maxrss=0, bi=0, bo=0