XAMPP - MySQL shutdown unexpectedly

Question

When I open XAMPP and click start MySQL button and it gives me an error. I had started it just before, but now it isn't working.

12:19:12 PM [mysql] Attempting to start MySQL app...
12:19:12 PM [mysql] Status change detected: running
12:19:13 PM [mysql] Status change detected: stopped
12:19:13 PM [mysql] Error: MySQL shutdown unexpectedly.
12:19:13 PM [mysql] This may be due to a blocked port, missing dependencies,
12:19:13 PM [mysql] improper privileges, a crash, or a shutdown by another method
12:19:13 PM [mysql] Press the Logs button to view error logs and check
12:19:13 PM [mysql] the Windows Event Viewer for more clues
12:19:13 PM [mysql] If you need more help, copy and post this
12:19:13 PM [mysql] entire log window on the forums

Here is the contents of the error log:

2013-08-02 12:19:12 4536 [Note] Plugin 'FEDERATED' is disabled.
2013-08-02 12:19:12 f64 InnoDB: Warning: Using innodb_additional_mem_pool_size is DEPRECATED. This option may be removed in future releases, together with the option innodb_use_sys_malloc and with the InnoDB's internal memory allocator.
2013-08-02 12:19:12 4536 [Note] InnoDB: The InnoDB memory heap is disabled
2013-08-02 12:19:12 4536 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions
2013-08-02 12:19:12 4536 [Note] InnoDB: Compressed tables use zlib 1.2.3
2013-08-02 12:19:12 4536 [Note] InnoDB: Not using CPU crc32 instructions
2013-08-02 12:19:12 4536 [Note] InnoDB: Initializing buffer pool, size = 16.0M
2013-08-02 12:19:12 4536 [Note] InnoDB: Completed initialization of buffer pool
2013-08-02 12:19:12 4536 [Note] InnoDB: Highest supported file format is Barracuda.
2013-08-02 12:19:12 4536 [Note] InnoDB: The log sequence numbers 0 and 0 in ibdata files do not match the log sequence number 1616798 in the ib_logfiles!
2013-08-02 12:19:12 4536 [Note] InnoDB: Database was not shutdown normally!
2013-08-02 12:19:12 4536 [Note] InnoDB: Starting crash recovery.
2013-08-02 12:19:12 4536 [Note] InnoDB: Reading tablespace information from the .ibd files...

The most important error message is here:

2013-08-02 12:19:12 4536 [ERROR] InnoDB:
Attempted to open a previously opened tablespace.
Previous tablespace mysql/innodb_table_stats uses space ID: 1 at filepath: .\mysql\innodb_table_stats.ibd.
Cannot open tablespace xat/payments which uses space ID: 1 at filepath: .\xat\payments.ibd

The rest of the log:

InnoDB: Error: could not open single-table tablespace file .\xat\payments.ibd
InnoDB: We do not continue the crash recovery, because the table may become
InnoDB: corrupt if we cannot apply the log records in the InnoDB log to it.
InnoDB: To fix the problem and start mysqld:
InnoDB: 1) If there is a permission problem in the file and mysqld cannot
InnoDB: open the file, you should modify the permissions.
InnoDB: 2) If the table is not needed, or you can restore it from a backup,
InnoDB: then you can remove the .ibd file, and InnoDB will do a normal
InnoDB: crash recovery and ignore that table.
InnoDB: 3) If the file system or the disk is broken, and you cannot remove
InnoDB: the .ibd file, you can set innodb_force_recovery > 0 in my.cnf
InnoDB: and force InnoDB to continue crash recovery here.

What is the cause of these errors and how can I rectify them?

Answer 1

STOP! Please do NOT delete ibdata1 file!

Deleting this file is like playing a Russian roulette with your databases, it could work and restablish everything, but also, probably could leave unusable every database you have.

Instead, first try using the MySQL backup folder which is included with XAMPP. So do the next:

1. Rename the folder mysql/data to mysql/data_old (you can use any name)
2. Create a new folder mysql/data
3. Copy the content that resides in mysql/backup to the new mysql/data folder
4. Copy all your database folders that are in mysql/data_old to mysql/data (skipping the mysql, performance_schema, and phpmyadmin folders from data_old)
5. Finally copy the ibdata1 file from mysql/data_old and replace it inside mysql/data folder
6. Start MySQL from XAMPP control panel

And, voilà!

Answer 2

IMPORTANT Deleting this file may render any existing MySQL data unusable. Use with caution

Hey I just did this and it worked:

1. exit Xampp server
2. go to your C:\xampp\mysql\data directory
3. delete the ibdata1 file
4. restart xampp server

It should work

Answer 3

1. Go to mysql/data/
2. Delete all random files (except the actual database folders)
3. Restart Apache and MySQL.

It should fix it.

Answer 4

If the answers mentioned above are not working, you can try deleting all the files in data, except for the folder

Goto: C:\xampp\mysql\data

After that: Goto: C:\xampp\mysql\bin

then open with notepad my.ini , Its look like this.

Then delete or put into comment the port 3306 and change it to 8111 then run xamp with administrator and its work well.

Answer 5

When you're not running XAMPP as an administrator, shutting down MySQL frequently causes corruption which means you have to repair or delete your tables. To avoid this you need to either run XAMPP as an administrator, or use the proper command prompt method for shutting down MySQL.

You can delete ibdata1 as Kratos suggests, but this can leave you with a broken database as other pieces of your database are still in the /mysql/data/ folder. In my case, this residual data stopped me successfully installing WordPress.

A cleaner way of undoing the damage is to revert your whole /mysql/data/ folder. Windows has built-in folder versioning — right click on /mysql/data/ and select Restore previous versions. You can then delete the current contents of the folder and replace it with the older version's contents.

Addendum: To ensure that you don't forget to run XAMPP as an administrator you can right click the XAMPP shortcut, go to Properties, then Advanced, and finally tick Run as administrator.

Answer 6

My Xampp MySQL worked just follows as below:

01.Go to mysql/data/ directory
02. delete the ibdata1 & ib_logfile*(ib_logfile0,ib_logfile1,ib_logfile101) file
03. restart xampp server

Answer 7

Add the following line below the [mysqld] section in the mysql config file (my.ini) and restart the apache web server and the mysql service afterwards.

[mysqld]
innodb_force_recovery = 4

Answer 8

I got the same kind of error in my C:\xampp\mysql\data\mysql_error.log when trying to start mysql.

2013-08-05 01:20:32 6780 [ERROR] InnoDB: Attempted to open a previously 
  opened tablespace. Previous tablespace mysql/slave_relay_log_info uses 
  space ID: 3 at filepath: .\mysql\slave_relay_log_info.ibd. Cannot open  
  tablespace test_database/test_table which uses space ID: 3 at filepath:  
  .\test_database\test_table.ibd

You'll have to read the error closely. This says that test_database is preventing mysql from starting.

You could blow away the offending database, these steps fix the problem:

1. Make sure mysql and xampp is shut down completely.
2. Go to your directory where mysql is installed, mine is: C:\xampp\mysql\data
3. You should see a folder with the name of a database that you created. mine was test_database.
4. Create a new folder somewhere else called C:\xampp\mysql\data\mysql\backuptablespace
5. Drag and drop (don't delete) the offending database table folder to the backup directory.
6. Try to start mysql again. For me it started right up in 1 second as expected.

If it doesn't work, put the file back where you started and you'll be back where you started.

If you don't want to delete the database and don't have backups:

If you don't have backups of table data and mysql won't start because something is corrupted you'll have to use the process of elimination to guess-and-check your way to exactly what you did that corrupted it. Follow these steps:

1. Make a clone of the entire C:\xampp\ and store it somewhere safe so you can get back to where you started.
2. Use a "binary search" approach to try to locate the corrupted item in the mysql database. It could be a file, or a table, or a database, or a user or anything.
3. Delete the entire database and see if that allows mysql to start. If it does, then put back the database and try removing some of the tables. If it doesn't, then try yanking out something else until it does start.

4. Try removing these files from C:\xampp\mysql\data\mysql: db.frm db.MRD db.MYI db.opt user.frm user.MYD user.MYI

5. When you get mysql to start, try putting things back until you find the one thing that you add which prevents it from starting. One bonus for this is you learn how mysql works under the hood.

Nuclear option:

Something you did screwed up the mysql server. An uninstall and reinstall of XAMPP should undo the corruption.

Answer 9

I also faced this issue and this is how I solved.
1. Make sure xampp is not under sub-directory. For example, it should be C:\xampp
2. You might need to run as administrator in running the application.

Hope this will work!

Answer 10

in my case i did following steps and it worked:

1. In Xampp control panel click on "Services" button from the right side toolbar

2. Then find "MySQL" from the services List

3. Click on it and from the left side of the panel click on "stop"

4. Turn back in Xampp control panel and click on start.

Answer 11

Step 1 : Close Xampp controller completely
Step 2 : Open C:\xampp\mysql\backup
Step 3 : Copy all the files from backup folder
Step 4 : Open C:\xampp\mysql\data
Step 5 : Paste the all the files in data folder
Step 6 : Re-start the Xampp controller

Answer 12

1. move xampp/mysql/backup files into xampp/mysql/data
2. RUN XAMPP as Administrator(make sure mysql is installed you can see a green tick if is installed)

Hope it helps!

Answer 13

Never delete this file (ibdata1) because all your data will be deleted!!!
I suggest three ways :

A:
1- Exit from XAMPP control panel.
1- Rename the folder mysql/data to mysql/data_old (you can use any name)
2- Create a new folder mysql/data
3- Copy the content that resides in mysql/backup to the new mysql/data folder
4- Copy all your database folders that are in mysql/data_old to mysql/data (skipping the mysql, performance_schema, and phpmyadmin folders from data_old)
5- Finally copy the ibdata1 file from mysql/data_old and replace it inside mysql/data folder
6- Reastart your system.

B:
1- Stop all sql services.
2- Next, start all sql services again.

C:
1- Open XAMPP control panel
2- Click on Config button, in front of mysql, click on my.ini



3- change client port and server port.

Answer 14

WORKING SOLUTION :- Follow the below listed steps.

Step 1. Rename the folder c:\xampp\mysql\data to c:\xampp\mysql\data_bkp (you can use any name).

Step 2. Create a new folder c:\xampp\mysql\data.

Step 3. Copy the content that resides in mysql\backup to the new mysql\data folder.

Step 4. Copy all your database folders that are in mysql\data_bkp to mysql\data (skipping the mysql, performance_schema, and phpmyadmin folders from mysql\data_bkp). IMPORTATN NOTE :- Please do not replace the existing files while pasting(click skip these files)

Step 5. Finally copy the ibdata1 file from mysql\data_bkp and replace it inside mysql\data folder.

Step 6. Start MySQL from XAMPP control panel.

And, Its DONE . No databases lost, no ports changed, no run as administrator, no force recovery, no kill mysqld process, no restoring from previous versions, no more errors.

Answer 15

Here is what I did. I restarted my computer. Next I run services.msc. I stopped the MySQL service then restarted it. The restarted the Xampp server.

Answer 16

No solution above worked for me. then I did below:

I deleted all the files inside C:\xampp\mysql\data\ directory except folders in this directory. It worked perfectly fine but my previous databases are not working now. So do above if you don't care it will delete all your previous databases in phpmyadmin.

Answer 17

i was facing the same issue and none of the solutions stated above helped me. i went to the mysql configuration file (my.ini) and changed the port number under [mysqld].By default mysql runs on 3306 port.

port= 3306

i changed it to ,

port= 8111

Then run as Administrator.Finally this worked for me.

Answer 18

I have resolved the problem by ending the task for mysqlid on Task Manager.

Answer 19

Guys just make sure you dont have MySql Server installed. Because I have MySql server pre-installed and when I start mysql from xampp control panel some port conflicts are happening and its not working.. SO before starting the mysql from xampp control panel make sure mysql server is not installed. I use .net so I have installed mysql server in the Past. Uninstalling it solved my Problem....

Answer 20

This means that you already have a MySQL database running at port 3306.

In the XAMPP control panel, press the 'Config' button and after that press 'my.ini'. After this, Ctrl-F and search for '3306'. Replace any '3306' that you find with a different port number of your choice (you could choose 3307 or 3308 - I chose 2811 and it worked).

After you have replaced every location where '3306' is written, save the file and press 'Start' on the control panel again.

Answer 21

I solved similar MySQL error & I think this answer will help you to fix the same type of MySQL database error.

Solution:

• Go to the “data” directory in the mysql database.
• I installed XAMPP on D: drive on my computer & the mysql “data” directory location of my computer was “D:\xampp\mysql\data\”. You may have different location.

Take Backup of MySQL “data” Folder

• First of all you should create a backup of the “data” folder using any compression software.

• Give a name like “data_backup.zip” or any type of compression you wish.

• I used winrar compression software to compress & backup mysql “data” folder.

Rename the “data” folder

• Rename the “data” folder to “data-oldfiles”. This is very important to rename the data directory to any new directory name.

Create a new “data” folder

• Create a new folder and give the folder name as “data“
• To solve the problem we need to create a new “data” directory in the mysql database.

Copy content from “backup” folder

• Go to the “backup” folder and copy all files.
• Paste the files from backup folder to data folder
• Now start the MySQL database from XAMPP.
• Your MySQL database will start properly without showing any error.

Transfer all MySQL projects Database, Data file & Log files

• If you have many database which was used for various projects, then you have to transfer all database from “data-oldfiles” folder to “data” folder.

• Copy all databases from the data-old files and paste to the data folder.

• Now you have to copy the data file “ibdata1” & all log files “ib_logfile0, ib_logfile1 ” from data-old files folder to the data folder.

• If you have many id_logiles then copied all of them.

• Now Start MySQL from XAMPP.

• Go to phpMyAdmin to check all databases are available & working.

• Now start your any website project from localhost to check the MySQL database.

The Problem is solved !!

• Now you will see the problem is solved and the error message “Error: MySQL shutdown unexpectedly.” will not show again.
• If you have any question on this issue please feel free to ask any question in the comments section.

You can read the details tutorials on the link bellow: Error: MySQL shutdown unexpectedly – Solution in 5 easy steps

You can also watch video tutorials to solve the problem:

[Solved] Error: MySQL shutdown unexpectedly

Answer 22

What worked for me is:

1. First I open Logs for MySql in XAMPP panel.
2. At the end it says you are running another instance of mysqlid in port 3306
3. I opened my task manager(Ctrl+Shift+Esc) then find mysqlid and End the task.

Answer 23

I had encountered the same issue, but all I had to do was close the XAMPP Control panel, go to the folder in which XAMPP is installed, find xampp-control.exe and run as administrator and then start the services.

Answer 24

Here is the way you can solve this problem:

1. Go to C:\xampp\mysql\data
2. You will see a folder named as mysql/data
3. Rename that folder from mysql/data to something else like mysql/data_not_useful any name that you want to give.
4. Create a new folder named as mysql/data.
5. Copy all the files of the mysql/backup and paste in mysql/data.
6. Now go to mysql/data_not_useful and copy the file ibdata1 from there.
7. Then paste it in mysql/data (You have to replace the file).
8. Restart your xampp server.
9. Now run your mysql server.

Answer 25

In my case in which I synced my mysql data and htdocs to dropbox, I just needed to delete the conflicted files in mysql/data folder and subfolders. The conflicted files can be identified by its names, dropbox will tell you that. It has solved the problem for me.

Answer 26

Make sure the system time is correct. Mine was set to the year 2040 somehow, correcting the date solved the problem.

Answer 27

For me I quit Skype, which was occupying port 80, then Apache ran happily on port 80, than I ran Skype and it picked another port this time.

Answer 28

if you are using MariaDB you can try this:

1. Go to mysql/data/
2. Rename aria_log_control to aria_log_control_old
3. Restart "Mysql"

Answer 29

i comment this statement in mysql/bin/my.ini

'innodb_additional_mem_pool_size=2M'

and it solve my problem. than you everyOne

Answer 30

Go to task manager And search mysqld and right click and select END TASK and refresh XAMPP