Database Lock

[Niall Donegan]

Hi all,

One of our servers is currently backing up with email in the queue, and 
the only thing unusual I can spot in the logs is:

Jan 22 12:37:51 server MailScanner[12737]: database is locked(5) at 
dbdimp.c line 398
Jan 22 12:38:17 server MailScanner[12868]: database is locked(5) at 
dbdimp.c line 398
Jan 22 12:38:21 server MailScanner[12737]: database is locked(5) at 
dbdimp.c line 398
Jan 22 12:38:51 server MailScanner[12868]: database is locked(5) at 
dbdimp.c line 398

This is printed out once for each child process.

As far as I know, the database in question is probably 
/var/spool/MailScanner/Incoming/SpamAssassin.cache.db but I can't figure 
out why MailScanner is having such problems with it on this one server.

Has anyone any suggestions as to what could be causing the problem?

Thanks,
Niall.