Starting MySQL. ERROR! The server quit without updating PID file (/longxibendi/mysql/mysql.pid).

一.问题描述

安装完MySQL 5.6

使用mysql.server 启动mysql进程失败报以下错误：

./mysql.server start
Starting MySQL. ERROR! The server quit without updating PID file (/longxibendi/mysql/mysql.pid).

但是手动启动mysqld_safe是可以的。

bin/mysqld_safe --defaults-file=/home/longxibendi/mysql/etc/my.cnf 2>&1 >/dev/null &

二.问题解决

大致看了下 mysql.server这个shell script，应该是/etc/my.cnf的问题。简单说一下，如果用mysql.server启动mysql，会默认读取/etc/my.cnf、/etc/mysql/my.cnf、安装主目录下my.cnf等文件作为启动是的配置文件。所有信息都在mysql.server中。详细可以阅读该文件。

于是，干掉my.cnf，解决问题。

三.相关问题

http://icesquare.com/wordpress/mysql-starting-mysql-error-the-server-quit-without-updating-pid-file/

This step-by-step guide is mainly for FreeBSD, however the idea is the same for Linux. Every once a while, when I update my FreeBSD box, the system likes to shutdown my MySQL server. Therefore, I need to start it again after the update is done. Unfortunately, the upgrade process is not smooth every time. Sometimes it will throw me some error.

/usr/local/etc/rc.d/mysql.server start

Oh well, I got the following error messages:

Starting MySQL..... ERROR! The server quit without updating PID file.

Sometimes, the message will tell you the exact location of which PID file:

Starting MySQL..... ERROR! The server quit without updating PID file (/var/db/mysql/www.icesquare.com.pid).

There are several solutions to troubleshoot these problems. I will go over each one by one.

Solution 1: Reboot The Computer

Solution 2: Remove Your MySQL Config File

If you have modified your MySQL configuration file, MySQL may not like it few versions after (MySQL is not backward compatibility friendly). It can be the problem of using an unsupported variable, or something similar. The easiest way is to remove your configuration file, and try to start the MySQL server again:

Backup your MySQL configuration first.

mv /etc/my.cnf /etc/my.cnf.backup

And restart the MySQL server again:

/usr/local/share/mysql/mysql.server start

Hopefully you will see the following message:

Starting MySQL. SUCCESS!

Solution 3: Upgrade Your Database File

Sometimes, the newer MySQL doesn’t like the database created in earlier version. I discovered this when I upgrade to MySQL 5.5.7:

Starting MySQL..... ERROR! The server quit without updating PID file (/var/db/mysql/www.icesquare.com.pid).

Since MySQL tells me which PID file causes the problem, I open the file and take a look what’s going on:

sudo tail /var/db/mysql/www.icesquare.com.err

And I saw something interesting: tables: Table ‘mysql.proxies_priv’ doesn’t exist:

101112 10:49:16  InnoDB: Initializing buffer pool, size = 128.0M
101112 10:49:16  InnoDB: Completed initialization of buffer pool
101112 10:49:16  InnoDB: highest supported file format is Barracuda.
101112 10:49:17  InnoDB: 1.1.3 started; log sequence number 1589404
101112 10:49:17 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.proxies_priv' doesn't exist
101112 10:49:17 mysqld_safe mysqld from pid file /var/db/mysql/www.icesquare.com.pid ended

The reason is very simple. MySQL could not open a table created in the earlier version (< 5.7.7) because it is not compatible with the current version. So, we can try to start the MySQL in safe mode through rc.d. First, you can edit the /etc/rc.conf and put the following into the file:

mysql_enable="YES"
mysql_args="--skip-grant-tables --skip-networking"

Restart MySQL through rc.d:

/usr/local/etc/rc.d/mysql-server start

If you did it right, you should see something like the following:

Starting MySQL.. SUCCESS!

Now, MySQL is already running the safe-mode. We want to perform a MySQL upgrade on all tables:

sudo mysql_upgrade

You should see something like this:

Looking for 'mysql' as: mysql
Looking for 'mysqlcheck' as: mysqlcheck
Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/tmp/mysql.sock'
Running 'mysqlcheck' with connection arguments: '--port=3306' '--socket=/tmp/mysql.sock'
mysql.columns_priv                                 OK
mysql.db                                           OK
mysql.event                                        OK
mysql.func                                         OK
mysql.general_log                                  OK
mysql.help_category                                OK
mysql.help_keyword                                 OK
mysql.help_relation                                OK
mysql.help_topic                                   OK
mysql.host                                         OK
mysql.ndb_binlog_index                             OK
mysql.plugin                                       OK
mysql.proc                                         OK
mysql.procs_priv                                   OK
mysql.servers                                      OK
mysql.slow_log                                     OK
mysql.tables_priv                                  OK
mysql.time_zone                                    OK
mysql.time_zone_leap_second                        OK
mysql.time_zone_name                               OK
mysql.time_zone_transition                         OK
mysql.time_zone_transition_type                    OK
mysql.user                                         OK
Running 'mysql_fix_privilege_tables'...
OK

Now, we want to switch the MySQL back to normal mode by commenting the extra options in /etc/rc.conf:

mysql_enable="YES"
#mysql_args="--skip-grant-tables --skip-networking"

And restart MySQL through /etc/rc.d:

/usr/local/etc/rc.d/mysql-server restart

Now the MySQL is up and running again!

Happy MySQLing.

–Derrick

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