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I upgraded MySQL on my CentOS server using yum

# mysql --version
mysql  Ver 14.14 Distrib 5.1.52, for redhat-linux-gnu (x86_64) using readline 5.1

I run service mysqld start and get the following error in the error logs (after it telling me that MySQL couldn't start):

110405 10:10:51 mysqld_safe Starting mysqld daemon with databases from /mnt/persistent/mysql
/usr/libexec/mysqld: Table 'mysql.plugin' doesn't exist
110405 10:10:51 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
110405 10:10:51  InnoDB: Started; log sequence number 30 391318478
110405 10:10:51 [ERROR] /usr/libexec/mysqld: unknown variable 'innodb_log_arch_dir=/mnt/persistent/mysql/'
110405 10:10:51 [ERROR] Aborting

110405 10:10:51  InnoDB: Starting shutdown...
110405 10:10:56  InnoDB: Shutdown completed; log sequence number 30 391318478
110405 10:10:57 [Note] /usr/libexec/mysqld: Shutdown complete

110405 10:10:57 mysqld_safe mysqld from pid file /var/run/mysqld/ ended

So, I ran mysql_upgrade like the 3rd line says. However, that gives the error:

# mysql_upgrade
Looking for 'mysql' as: mysql
Looking for 'mysqlcheck' as: mysqlcheck
Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/var/lib/mysql/mysql.sock' mysqlcheck: Got error: 2002: Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) when trying to connect
FATAL ERROR: Upgrade failed

I think there's something circular going on: I can't start mysqld without running mysql_upgrade and I can't run mysql_upgrade without mysqld running.

Any ideas?

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up vote 1 down vote accepted

The variable innodb_log_arch_dir has been unsused since 4.0.6

if you comment out


in your my.cnf

mysqld should start successfully.

share|improve this answer
Awesome it works!! Thanks! – Max Apr 7 '11 at 6:15

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