Unable to start mysql server after update

Question

Today I updated the system, and I cant start the mysql server:

I'm getting the following error:

Aug 14 14:32:09 VULTURUS kernel: [ 1996.413190] init: mysql main process (14122) terminated with status 1
Aug 14 14:32:09 VULTURUS kernel: [ 1996.413262] init: mysql main process ended, respawning
Aug 14 14:32:10 VULTURUS kernel: [ 1997.373479] init: mysql post-start process (14123) terminated with status 1
Aug 14 14:32:10 VULTURUS kernel: [ 1997.391012] type=1400 audit(1344947530.964:242): apparmor="STATUS" operation="profile_replace" name="/usr/sbin/mysqld" pid=14156 comm="apparmor_parser"
Aug 14 14:32:11 VULTURUS kernel: [ 1997.453824] type=1400 audit(1344947531.028:243): apparmor="DENIED" operation="open" parent=1 profile="/usr/sbin/mysqld" name="/media/WESYS_DATA/MySql_LX/" pid=14160 comm="mysqld" requested_mask="r" denied_mask="r" fsuid=115 ouid=0
Aug 14 14:32:11 VULTURUS kernel: [ 1997.456707] init: mysql main process (14160) terminated with status 1
Aug 14 14:32:11 VULTURUS kernel: [ 1997.456775] init: mysql respawning too fast, stopped

But I already added the exception in the /etc/apparmor.d/usr.sbin.mysqld

# vim:syntax=apparmor
# Last Modified: Tue Jun 19 17:37:30 2007
#include <tunables/global>

/usr/sbin/mysqld {
  #include <abstractions/base>
  #include <abstractions/nameservice>
  #include <abstractions/user-tmp>
  #include <abstractions/mysql>
  #include <abstractions/winbind>

  capability dac_override,
  capability sys_resource,
  capability setgid,
  capability setuid,

  network tcp,

  /etc/hosts.allow r,
  /etc/hosts.deny r,

  /etc/mysql/*.pem r,
  /etc/mysql/conf.d/ r,
  /etc/mysql/conf.d/* r,
  /etc/mysql/*.cnf r,
  /usr/lib/mysql/plugin/ r,
  /usr/lib/mysql/plugin/*.so* mr,
  /usr/sbin/mysqld mr,
  /usr/share/mysql/** r,
  /var/log/mysql.log rw,
  /var/log/mysql.err rw,
  /var/lib/mysql/ r,
  /var/lib/mysql/** rwk,
  /var/log/mysql/ r,
  /var/log/mysql/* rw,
  /var/run/mysqld/mysqld.pid w,
  /var/run/mysqld/mysqld.sock w,
  /run/mysqld/mysqld.pid w,
  /run/mysqld/mysqld.sock w,

  /sys/devices/system/cpu/ r,

  /media/WESYS_DATA/MySql_LX/** rwk,
  /media/WESYS_DATA/MySql_LX/** rwk,

  # Site-specific additions and overrides. See local/README for details.
  #include <local/usr.sbin.mysqld>
}

Answer 1

The following two lines in the /etc/apparmor.d/usr.sbin.mysqld overlap.

/media/WESYS_DATA/MySql_LX/** rwk,
/media/WESYS_DATA/MySql_LX/** rwk,

When you replace these lines to the below lines, your problem may be solved.

/media/WESYS_DATA/MySql_LX/ r,
/media/WESYS_DATA/MySql_LX/** rwk,

Answer 2

In my case, the message:

mysql respawning too fast 

I found in the syslog that this was there because I had done a remove of apparmor, but had forgotten to restart my server.

After a reboot of my server, mysql started fine.