[qmailtoaster] dovecot mysql connection lost

[Jeff Koch]

For about a 15 minutes period users couldn't receive emails - emails 
were bouncing back saying the users did not exist. We traced the problem 
to the dovecot log where we saw this:

Sep 15 12:16:23 auth-worker: Error: vmysql: sql error[3]: Table 
'vpopmail.users' doesn't exist
Sep 15 12:16:23 auth-worker: Error: Attempting to rebuild connection to 
SQL server
Sep 15 12:16:23 auth-worker: Error: vmysql: connection rebuild failed: 
Table 'vpopmail.users' doesn't exist

Shortly thereafter dovecot was able to connect and emails began being 
received normally again.

Any thoughts on how to prevent this in the future? Should we raise the 
number of mysql connections - we're using the default.

Regards, Jeff Koch