ERROR! MySQL manager or server PID file could not be found! QNAP

Question

I am having an issue where MySQL isn\'t starting on my QNAP NAS.

I found this first by not being able to log in through phpMyAdmin - was getting error:

Answer 1

If you have installed MySQL using brew the best way to go would be with homebrew

brew services restart mysql

after you run that command, all the problems that the update generated will be resolved

Answer 2

I ended up figuring this out on my own.

In searching for my logs I went into

cd /usr/local/mysql/var

In there I found the file named [MyNAS].pid (replace [MyNAS] with the name of your NAS.

I then ran the following to remove the file

rm -rf /usr/local/mysql/var/[MyNAS].pid

I then restarted mysql

[/usr/local/mysql/var] # /etc/init.d/mysqld.sh restart        
/mnt/ext/opt/mysql
/mnt/ext/opt/mysql
Try to shutting down MySQL
ERROR! MySQL manager or server PID file could not be found!
/mnt/ext/opt/mysql
Starting MySQL. SUCCESS! 

I tested everything and it all works like a charm again!

Answer 3

Nothing of this worked for me. I tried everything and nothing worked.

I just did :

brew unlink mysql && brew install mariadb

My concern was if I would lost all the data, but luckily everything was there.

Hope it works for somebody else

Answer 4

I was able to solve this on OS X by shutting down the existing mysql.server that was running:

mysql.server stop

The starting:

mysql.server start

From there I could run mysql.server restart without throwing the ERROR.

Answer 5

I have the same problem. I found the file {username}.local.err instead of {username}.local.pid inside /usr/local/mysql, then i changed the name *.err to *.pid and it works fine.
Starting MySQL. SUCCESS!

My OS El Capitan 10.11.5

Answer 6

I had the same issue. It turns out I added incorrect variables to the my.cnf file. Once I removed them and restarted mysql started with no issue.