MySQL server PID file could not be found

mysql mac-osx pid osx-mountain-lion

162,699

Solution 1

In your mysql configuration file - my.cnf, check for the parameter pid-file and see where it points. If it is not there, set it manually to -

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

Create the directory /var/run/mysqld/ and give it proper permissions -

  mkdir /var/run/mysqld
  touch /var/run/mysqld/mysqld.pid
  chown -R mysql:mysql /var/run/mysqld

Solution 2

This question is a bit outdated but I thought I'd post how I resolved this issue when it happened to me on my Mac (OS X El Capitan 10.11.4).

Check the status just to be sure

mysql.server status

ERROR! MySQL is running but PID file could not be found

Find all running mysql processes

ps aux | grep mysql

It will list out all the processes using mysql (including the command you just executed)

Kill off all the mysql pids

sudo kill <pid1> <pid2> <pid3> ...

This should kill off all the mysql processes

Now try to fire mysql up

mysql.server start

Starting MySQL . SUCCESS!

Hope this helps someone!

EDIT: Alternative solution from @DanielTate

This worked for me JasperSoft Wiki - uninstall-mysql-mac-os-x. I had to brew uninstall mysql then delete ALL of the files then reinstall and follow the home brew install instructions

EDIT 2: Alternative solution from @JanacMeena

There is a nice write-up of their solution in this post on Medium.

162,699

Author by

simpleengine

A programmer from the Left Coast of Canada

Updated on September 18, 2022

Comments

simpleengine over 1 year
I can start MySQL fine,
```
/usr/local/mysql/support-files/mysql.server start
Starting MySQL
SUCCESS! 
```
But any MySQL action after that I get the error:

MySQL server PID file could not be found
```
/usr/local/mysql/support-files/mysql.server stop
ERROR! MySQL server PID file could not be found!
```
Where do I find the server PID file on Mac with OSX 10.8? I am wondering if it is a permission problem. The mysql.sock file is a symlink pointing to the file in the tmp/ directory.
```
sudo ln -s /tmp/mysql.sock /var/mysql/mysql.sock
```
- Janac Meena almost 4 years
  
  This can be caused by so many factors, i.e. permissions, ownership, corrupted data - to see a summary of how to determine which one, check this article: medium.com/@7anac/…
simpleengine about 11 years

Okay, I am trying this. I will let you know how it goes
simpleengine about 11 years

Great, you are a genius. It works. The only thing that was missing was the line pid-file in my.cnf I had to run /usr/local/mysql/support-files/mysql.server restart twice to remove the error
mOna about 8 years

I cannot find pid-file in my.cnf .. could I add this line pid-file = /var/run/mysqld/mysqld.pid ??
Daniel t. about 8 years

yes, if you are getting "PID file not found" error.
mOna about 8 years

@Danielt.thanks for your reply. I tried what you said.. the error is now changes to ERROR! The server quit without updating PID file (/var/run/mysqld/mysqld.pid). do u have any idea?! :|
Daniel t. about 8 years

stackoverflow.com/questions/4963171/…
Mangano over 7 years

ERROR! The server quit without updating PID file
Rockin4Life33 over 7 years

@Nisanio Along with ERROR! The server quit without updating PID file does it give reference to a .pid file? Maybe something similar to ERROR! The server quit without updating PID file (/usr/local/mysql/data/<userName>.<pidFileName>.pid)
Daniel Tate over 7 years

This worked for me community.jaspersoft.com/wiki/uninstall-mysql-mac-os-x. I had to brew uninstall mysql then delete ALL of the files then reinstall and follow the home brew install instructions
Rockin4Life33 over 7 years

@DanielTate Thanks for adding that in w/the link. Should be helpful to others!
Snekse about 5 years

ps aux | grep [m]ysql will help prevent grep from grepping itself
gvanto over 4 years

I did the above step and still getting error: [15:57:53][~]#sudo mysql.server restart ERROR! MySQL server PID file could not be found! Starting MySQL .. ERROR! The server quit without updating PID file (/var/run/mysqld/mysqld.pid).
Janac Meena almost 4 years

@Nisanio did you figure out how to solve that issue?
Rockin4Life33 almost 4 years

@JanacMeena I've updated my answer to include Daniel Tate alt solution from comments, in the case Nisanio doesn't get back to you w/a solution. Hopefully this helps unblock you, if not post back with more details; maybe I — or the community — can be of assistance
Janac Meena almost 4 years

@Rockin4Life33 thanks for your response, but I was able to solve this issue by deleting my ibdata files and ib-log files.
Janac Meena almost 4 years

For reference, I documented my solution here: medium.com/@7anac/…
Rockin4Life33 almost 4 years

@JanacMeena, thank you for the write-up on Medium and posting the link. I've updated the answer to contain your solution.