Mysql keeps restarting (but i'm not sure why)

Question

I recently discovered the following error in a log

Oct 14 10:21:43 squire-labs kernel: [4186256.684193] init: mysql main process (16331) terminated with status 1
Oct 14 10:21:43 squire-labs kernel: [4186256.684215] init: mysql main process ended, respawning
Oct 14 10:21:44 squire-labs kernel: [4186257.394474] type=1400 audit(1381738904.046:23): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=28201 comm="apparmor_parser"
Oct 14 10:21:47 squire-labs /etc/mysql/debian-start[28254]: Upgrading MySQL tables if necessary.
Oct 14 10:21:47 squire-labs /etc/mysql/debian-start[28257]: /usr/bin/mysql_upgrade: the '--basedir' option is always ignored
Oct 14 10:21:47 squire-labs /etc/mysql/debian-start[28257]: Looking for 'mysql' as: /usr/bin/mysql
Oct 14 10:21:47 squire-labs /etc/mysql/debian-start[28257]: Looking for 'mysqlcheck' as: /usr/bin/mysqlcheck
Oct 14 10:21:47 squire-labs /etc/mysql/debian-start[28257]: This installation of MySQL is already upgraded to 5.5.29, use --force if you still need to run mysql_upgrade
Oct 14 10:21:47 squire-labs /etc/mysql/debian-start[28269]: Checking for insecure root accounts.
Oct 14 10:21:47 squire-labs /etc/mysql/debian-start[28274]: Triggering myisam-recover for all MyISAM tables

This happens often (at least 4 times a minute). I'm really not sure what might be causing this issue. Mysql is running on a production server, with enough disk space and memory. Up until yesterday we've never had any problems.

Any help will be much appreciated.

Answer 1

It turned out that one of my tables in one of the dbs was corrupted. This article proved to be very useful.

In the end, I simply made a mysqldump of the database and restored the dump to a new database. That solved the problem.