CODEWITHSUNDEEP
mysql
Boaris
Boaris

Reputation: 5236

mysqld: Can't change dir to data. Server doesn't start

I installed a MySQL server with installer and it started. After reboot I tried to start it again and get the error:

D:\Program Files\MySQL\MySQL Server 5.7\bin>mysqld -u root -p
mysqld: Can't change dir to 'D:\Program Files\MySQL\MySQL Server 5.7\data\'     (Errcode: 2 - No such file or directory)
2015-11-17T08:30:18.822962Z 0 [Warning] TIMESTAMP with implicit DEFAULT     value is deprecated. Please use --explicit_defaults_for_timestamp server option     (see documentation for more details).
2015-11-17T08:30:18.822962Z 0 [Warning] Insecure configuration for --secure-    file    -priv: Current value does not restrict location of generated files.     Consider setting it to a valid, non-empty path.
2015-11-17T08:30:18.822962Z 0 [Note] mysqld (mysqld 5.7.9) starting as     process 1108 ...
2015-11-17T08:30:18.838586Z 0 [Warning] Can't create test file D:\Program     Files\MySQL\MySQL Server 5.7\data\DESKTOP-RNBR3E8.lower-test
2015-11-17T08:30:18.838586Z 0 [Warning] Can't create test file D:\Program     Files\MySQL\MySQL Server 5.7\data\DESKTOP-RNBR3E8.lower-test
2015-11-17T08:30:18.838586Z 0 [ERROR] failed to set datadir to D:\Program     Files\MySQL\MySQL Server 5.7\data\
2015-11-17T08:30:18.838586Z 0 [ERROR] Aborting


2015-11-17T08:30:18.838586Z 0 [Note] Binlog end
2015-11-17T08:30:18.838586Z 0 [Note] mysqld: Shutdown complete

I tried to reinstall MySQL.
UPDATE:
When I run mysqld -u root -p as administrator, nothing happens.

Upvotes: 98

Views: 196974

Answers (17)

allen yang
allen yang

Reputation: 125

In my case, I'm MySQL5.6, install by workbrench install tools in Win10 pro. there are two configuration file need to modify, only edit the line: datadir=E:\MySQL

  1. stop MySQL56 service using services.msc
  2. edit my.ini under C:\ProgramData\MySQL\MySQL Server 5.6
  3. edit my-default.ini under C:\Program Files\MySQL\MySQL Server 5.6
  4. copy C:\ProgramData\MySQL\MySQL Server 5.6*.* to E:\MySQL
  5. start MySQL56 service using services.msc

test: create database 'testdb'; It's successed if found testdb folder exist in E:\MySQL.

Upvotes: 0

Rex the Strange
Rex the Strange

Reputation: 131

I don't know if it's your problem but try this...

For me, the version of my.ini which is created under "ProgramData\MySQL\MySQL Server [version]" wasn't read. I had to move it to "Program Files\MySQL\MySQL Server [version]".

RTS.

Upvotes: 1

Stuart Welch
Stuart Welch

Reputation: 409

If you are having this issue and can't find the MySQL service either, just launch "MySQL Installer" from the Start menu (or download it), then choose "Reconfigure" on MySQL Server. Follow the steps to set a root user password and then the service will be created and started automatically (and set to auto-start on boot).

Upvotes: 3

mahee96
mahee96

Reputation: 841

Check for missing folders that are required by the server, in my case it was UPLOADS folder in programData which was deleted by empty folder cleaner utility that I used earlier.

How did I find out:

run the server config file my.ini(in my case it was in programData) as the defaults-file param for mysqld (don't forget to use --console option to view error log on screen) 'mysqld --defaults-file="C:\ProgramData\MySQL\MySQL Server 8.0\my.ini" --console'

Error:

mysqld: Can't read dir of 'C:\ProgramData\MySQL\MySQL Server 8.0\Uploads\' (OS errno 2 - No such file or directory)

Solution:

Once I manually created the Uploads folder the server started successfully.

Upvotes: 0

Lazycoder-007
Lazycoder-007

Reputation: 1215

This solution uses the windows mysql installer.

I have tried every other way mentioned here and other related posts, but it did not solve my problem, the service just wont start, but the below approach with the mysql-installer did.

If you still have your installer or atleast remember the version then follow below steps:

  1. Start your windows mysql installer. For me it was "mysql-installer-community-8.0.20.0"
  2. Then remove/uninstall the SQL Server and remove all configurations
  3. Manually delete the SQL Server folder from "C:\Program Files\MySQL\MySQL Server 8.0."
  4. Start your mysql installer again and install the SQL Server again

You can check from the window's services that the MySqL Server has started.

Hope it helps someone.

Upvotes: 0

Suleiman Umar
Suleiman Umar

Reputation: 31

When I encountered this same error, I noticed MySQL Configuration file in "C:\Program Files\MySQL\MySQL Server X.Y\" has changed to my-default.ini

I solved it by

  1. Copy my.ini from "C:\ProgramData\MySQL\MySQL Server X.Y\my.ini"
  2. Paste it in "C:\Program Files\MySQL\MySQL Server X.Y\my.ini"
  3. Restart MySQL Server from services.msc

In the .ini file, their is part that reads:

# On Windows you should keep this file in the installation directory 
# of your server (e.g. C:\Program Files\MySQL\MySQL Server X.Y). To
# make sure the server reads the config file use the startup option 
# "--defaults-file".

Upvotes: 2

DRoberts
DRoberts

Reputation: 29

mariofertc completely solved this for me here are his steps:

  1. Verify mysql's data directory is empty (before you delete it though, save the err file for your records).

  2. Under the mysql bin path run: mysqld.exe --initialize-insecure

  3. add to my.ini (mysql's configuration file) the following: [mysqld] default_authentication_plugin=mysql_native_password

Then check services (via task manager) to make sure MySql is running, if not - right click MySql and start it.

I'll also note, if you don't have your mysql configuration file in the mysql bin and can't find it via the windows search, you will want to look for it in C:\Program Data\Mysql\ Note that it might be a different name other than my.ini, like a template, as Heesu mentions here: Can't find my.ini (mysql 5.7) Just find the template that matches the version of your mysql via the command mysql --version

Upvotes: 0

mariofertc
mariofertc

Reputation: 421

In mysql 8.0.13 zip package initializing.

  1. Verify that data folder is empty.

  2. Under the mysql bin path run

    mysqld.exe --initialize-insecure

  3. Add to my.ini native mysql

    [mysqld]

    default_authentication_plugin=mysql_native_password

Upvotes: 2

Edmond Weiss
Edmond Weiss

Reputation: 541

If you installed MySQL Server using the Windows installer and as a Window's service, then you can start MySQL Server using PowerShell and experience the convenience of not leaving the command line.

Open PowerShell and run the following command:

Get-Service *sql*

A list of MySQL services will be retrieved and displayed. Choose the one that you want and run the following command while replacing service-name with the actual service name:

Start-Service -Name service-name

Done. You can check that the service is running by running the command Get-Service *sql* again and checking the status of the service.

Upvotes: 0

user7895148
user7895148

Reputation:

remove all files in "{path-to-mysql}\data" directory and run:

mysqld --initialize-insecure --basedir={path-to-mysql}\mysql --datadir={path-to-mysql}\data --console

Upvotes: 1

keerthiprasath
keerthiprasath

Reputation: 1062

I have met same problem. In my case I had no ..\data dir in my C:\mysql\ so I just executed mysqld --initialize command from c:\mysql\bin\ directory and I got the data directory in c:\mysql\data. Afterwards I could use mysqld.exe --console command to test the server startup.

Upvotes: 102

Nizar
Nizar

Reputation: 520

First run 

mysqld -u root --initialize-insecure

It will create data folder with root as user without password. Then run 

mysqld.exe -u root --console

Upvotes: 19

Keith Ballantyne
Keith Ballantyne

Reputation: 121

What I did (Windows 10) for a new installation:

  1. Start cmd in admin mode (run as administrator by hitting windows key, typing cmd, right clicking on it and selecting "Run as Administrator"

  2. Change into "MySQL Server X.Y" directory (for me the full path is C:\Program Files\MySQL\MySQL Server 5.7")

  3. using notepad create a my.ini with a mysqld section that points at your data directory

    [mysqld]
datadir="X:\Your Directory Path and Name"

  4. created the directory identified in my.ini above.

  5. change into bin Directory under server directory and execute: mysqld --initialize

  6. Once complete, started the service and it came up fine.

Upvotes: 12

Ferhat KOÇER
Ferhat KOÇER

Reputation: 4075

Check your real my.ini file location and set --defaults-file="location" with this command

mysql --defaults-file="C:\MYSQL\my.ini" -u root -p

This solution is permanently for your cmd Screen.

Upvotes: 1

Hanshan
Hanshan

Reputation: 3764

In my case, I had installed the data directory to a different location. So the data directory really wasn't in the default location. Therefore, when I ran the mysqld command from the command prompt, I had to specify the data directory manually:

mysqld --datadir=D:/MySQLData/Data

Here's the documentation for mysqld command-line arguments.

Upvotes: 32

AaronDanielson
AaronDanielson

Reputation: 2470

Since you used the Windows installer, everything is set up for you to run MySQL 5.7 as a Windows service, which is a great option in most cases.

Instead of running mysqld.exe from the command line,

  1. Win + R
  2. Run services.msc
  3. Right-click on MySQL57
  4. Start the service.

Upvotes: 101

Stephane Paquet
Stephane Paquet

Reputation: 2344

  1. Check that the director exists.
  2. If it exists make sure mysql has access rights on it (read/write). Can be a good idea to run MySQL as a system process, but not mandatory.

If this is stil not working try having the following notation with double slashes: C:\WebSerer\MySQL\data or C:/WebServer/MySQL/data

Upvotes: 7

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