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     2002 Cannot log in to the MySQL server   I then went to attempt to start mysql  as I guess this is a common issue with this  but it just gave a generic error   I went through troubleshooting the mysql sock file and everything  changing its permissions  but nothing is working   I have rebooted my NAS many times   I eventually tried to restart mysql   In doing so I get   ERROR  MySQL manager or server PID file could not be found    I can t find anything specific to the QNAP or any general type troubleshooting for this   Everything I find seems to be OSX related

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After doing setup of PHPMyAdmin  I was also facing the same problem      Then I just stopped the MYSQL server by going into System settings  and then started again  and it worked

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I know this is an older post  but I ran into the ERROR  MySQL server PID file could not be found  when trying to start MySQL after making an update to my cnf file  I did the following to resolve the issue    Deleted my experimental update to my cnf Deleted the  net pid and  net err files    delete  usr local var mysql    lt YourUserName gt   -MBP airstreamcomm net      Ensured all MySQL processes are stopped    ps -ax   grep mysql kill    lt process id gt       Started MySQL server as normal    mysql server start

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Run the below commands and it will work   Go to terminal and type  sudo chown -RL root mysql  usr local mysql  sudo chown -RL mysql mysql  usr local mysql data  sudo  usr local mysql support-files mysql server start

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After a lot of searching  I was able to fix the  PID file cannot be found  issue on my machine  I m on OS X 10 9 3 and installed mysql via Homebrew   First  I found my PID file here    usr local var mysql  username  pid   Next  I located my my cnf file here    usr local Cellar mysql 5 6 19 my cnf   Finally  I added this line to the bottom of my cnf   pid-file    usr local var mysql  username  pid   Hopefully this works for someone else  and saves you a headache  Don t forget to replace  username  with your machine s name  jeffs-air-2 in my case

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Check if your server is full first  thats a common reason  can t create the PID file because you have no space    Run this to check your disk usage    df -h   If you get something like this  you are full    Filesystem      Size  Used Avail Use  Mounted on  dev vda1        40G   40G  6 3M 100      In that case  you need to start looking for what to delete to make room  or add an additional drive to your server

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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

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root host      service mysql restart MySQL server PID file could not be found   FAILED  Starting MySQL The server quit without updating PID file    FAILED mysql host pxx com pid    root host      vim  etc my cnf Add Line in my cnf its working know innodb file per table 1 innodb force recovery   1   Result  root host      service mysql restart MySQL server PID file could not be found   FAILED  Starting MySQL              OK   root host      service mysql restart Shutting down MySQL       OK   Starting MySQL    OK     Source

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ERROR  MySQL server PID file could not be found   This might be due to issues with disk space  disk inode usage or innodb corruption which may lead to the error   The issue was with the pid file and the solution was    SSH login to server as a root Create directory  var run mysql      mkdir  var run mysql   3  Create  a file with name as mysqld pid     touch mysqld pid    Change its ownership and group to  mysql mysql     chown mysql mysql mysqld pid  Restart MySQL service   Done

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If you re using MySQL Workbench  the mysql server stop restart start will not work    You will need to login into the workbench and then click  shutdown server   See image attached

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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

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Just run mysqld  don t run as root  from your terminal  Your mysql server will restart and reset everything like shown in the picture below     And use a command like so   mysql -u root -h 127 0 0 1

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First find PID of mysql service  ps aux   grep mysql   Then  you have to kill process   sudo kill  lt pid gt    After you again start mysql service  mysql server start

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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

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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

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Nothing of this worked for me  I tried everything and nothing worked   I just did    brew unlink mysql  amp  amp  brew install mariadb   My concern was if I would lost all the data  but luckily everything was there   Hope it works for somebody else

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I tried everything above  but saw no results until I got a hint from here  https   superuser com questions 159486 how-to-kill-process-in-mac-os-x-and-not-have-it-restart-on-its-own  I eventually went over to the activity monitor in my Mac  force Quit the PID  and ran the command   sudo  usr local mysql support-files mysql server restart   The magic was done

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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

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Note  If you just want to stop MySQL server  this might be helpful   In my case  it kept on restarting as soon as I killed the process using PID  Also brew stop command didn t work as I installed without using homebrew  Then I went to mac system preferences and we have MySQL installed there  Just open it and stop the MySQL server and you re done  Here in the screenshot  you can find MySQL in bottom of system preferences

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

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