在Mac OS X v10.6 (Snow Leopard)上,启动MySQL会出现以下错误:

服务器退出,没有更新PID文件

文件my.cnf

[mysqld]
port            = 3306

socket          = /tmp/mysql.sock

skip-external-locking

key_buffer_size = 16K

pid-file=/var/run/mysqld/mysqld.pid

[mysqld_safe]

log-error=/var/log/mysqld.log

pid-file=/var/run/mysqld/mysqld.pid

当前回答

以安全模式启动MySQL:

/usr/local/mysql/bin/mysqld_safe start

或者在Mac上,结束Activity Monitor应用程序中的任何mysql或mysqld任务(或其他)。

或者检查你的错误

tail -f /usr/local/mysql/data/XXXXX-XXXXX-Pro.local.err

其他回答

删除*。在错误提示的目录中找到的错误文件,创建MySQL所抱怨的文件,并重新启动MySQL。

似乎MySQL进程正在运行,因此您无法使用端口。用于查看正在运行的MySQL进程。

ps auxf | grep mysql

如果你得到任何MySQL进程,使用kill -9 PID杀死该进程ID,然后尝试启动MySQL。

对我来说,解决方案是覆盖/纠正/etc/my/cnf中的数据目录

我用自述文件中提供的说明从源代码构建MySQL 5.5.27:


# Preconfiguration setup
shell> groupadd mysql
shell> useradd -r -g mysql mysql
# Beginning of source-build specific instructions
shell> tar zxvf mysql-VERSION.tar.gz
shell> cd mysql-VERSION
shell> cmake .
shell> make
shell> make install
# End of source-build specific instructions

# Postinstallation setup
shell> cd /usr/local/mysql
shell> chown -R mysql .
shell> chgrp -R mysql .
shell> scripts/mysql_install_db --user=mysql
shell> chown -R root .
shell> chown -R mysql data

# Next command is optional
shell> cp support-files/my-medium.cnf /etc/my.cnf
shell> bin/mysqld_safe --user=mysql &

# Next command is optional
shell> cp support-files/mysql.server /etc/init.d/mysql.server

Mysqld_safe在没有解释的情况下自行终止。运行/etc/init.d/mysql.服务器启动导致错误:

服务器退出没有更新PID文件

I noticed something odd in the installation instructions though. It has ownership changed to mysql for the directory "data", but not to "var"; this is unusual because for years I have had to ensure that var directory was mysql writable. So I manually ran chown -R mysql /usr/local/mysql/var and then attempted to start it again. Still no luck. But worse, no .err file in the var dir - it was in the "data" dir! so scripts/mysql_install_db sets up camp in /usr/local/mysql/var, but the rest of the application seems to want to do its work in /usr/local/mysql/data!

所以我只是编辑了/etc/my.cnf,在部分[mysqld]下,我添加了一个指令,显式地将mysql的数据目录指向var(因为我通常期望它是任何方式),这样做之后,mysqld启动得很好。add指令看起来像这样:

数据= /usr/地方/mysql/var

为我工作。希望对你有所帮助。

试试这个…

导航到问题的父目录cd YOURPATH/usr/local/mysql Rm -rf *.local。Err(删除文件) touch YOURUSERNAME.local.pid(生成新的*.local. pid。错误抛出的Pid文件正在抱怨) “cd”回到你的项目,并重新启动MySQL使用MySQL。服务器启动

如果你的系统有多个版本的MySQL,那么你很可能会遇到这个PID错误:

我们可以从杀死所有MySQL进程开始:

sudo killall mysqld

转到/usr/local,选择你想要的MySQL版本,然后为它提供MySQL权限。在我的情况下,我需要版本8。

sudo chown -R mysql mysql-8.0.21-macos10.15-x86_64

打开/usr/local/mysql-8.0.21-macos10.15-x86_64文件夹,启动SQL server:

sudo。/ mysql。服务器启动(输入您的笔记本电脑密码)

如果它给出下面的输出…PID问题解决了

sudo ./mysql.server start

Starting MySQL
.. SUCCESS!