MySQL无法在Xampp控制面板上启动

Question

Error

1:47:20 AM  [mysql]     Error: MySQL shutdown unexpectedly.
1:47:20 AM  [mysql]     This may be due to a blocked port, missing dependencies, 
1:47:20 AM  [mysql]     improper privileges, a crash, or a shutdown by another method.
1:47:20 AM  [mysql]     Press the Logs button to view error logs and check
1:47:20 AM  [mysql]     the Windows Event Viewer for more clues
1:47:20 AM  [mysql]     If you need more help, copy and post this
1:47:20 AM  [mysql]     entire log window on the forums

Log :

2013-12-12 01:33:01 3204 [Note] Plugin 'FEDERATED' is disabled.
 2013-12-12 01:33:01 828 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. 
2013-12-12 01:33:01 3204 [Note] InnoDB: The InnoDB memory heap is disabled
2013-12-12 01:33:01 3204 [Note] InnoDB: Mutexes and rw_locks use Windows 
interlocked        functions  
2013-12-12 01:33:01 3204 [Note] InnoDB: Compressed tables use zlib 1.2.3
  2013-12-12 01:33:01 3204 [Note] InnoDB: Not using CPU crc32 instructions
 2013-12-12 01:33:01 3204 [Note] InnoDB: Initializing buffer pool, size = 16.0M
 2013-12-12 01:33:01 3204 [Note] InnoDB: Completed initialization of buffer pool
 2013-12-12 01:33:01 3204 [Note] InnoDB: Highest supported file format is Barracuda.
 2013-12-12 01:33:02 3204 [Warning] InnoDB: Resizing redo log from 2*3072 to 2*320    
  pages  , LSN=1625987 
2013-12-12 01:33:02 3204 [Warning] InnoDB: Starting to delete and rewrite log files.
2013-12-12 01:33:02 3204 [Note] InnoDB: Setting log file C:\xampp\mysql
\data\ib_logfile101 size to 5 MB

2013-12-12 01:33:02 3204 [Note] InnoDB: Setting log file C:\xampp\mysql     
\data\ib_logfile1 size to 5 MB

2013-12-12 01:33:02 3204 [Note] InnoDB: Renaming log file C:\xampp\mysql

facing this error , WHY ?

Answer 1

My friend! it seems somke other application is running on the same port number as the apache or mysql. The default port number of apache server is 80 . Accidentally Skype uses the same port number as the apache server. And maybe the default port number 3306 used by mysql server is also being used by some other application. In my case it was the wampp server which also has mysql server inbuilt into it.

1. Changing the Apache servers port number.

                         Now what you gonna so it change the default port numbers of both the apache server and the mysql server
manually. To change the port number of apache, u have to o into the
xampp folder in your installation directory(Mine was C drive). In
there the file location would be : 

C:\\xampp\\apache\\conf

(Ur installation directory may as well be different). In there theres a CONF file/configuration file named httpd.conf . Open the file using any text editor and then try finding the number 80 manually or usiong a finder( Ctrl + F in notepad++ for ex.). You will find them at #Listen 12.34.56.78:12 Listen 12 and ServerName localhost: 12 . In both these places replace the number 80 with a well chosen number and remember that the number at all the places should be the same, and remember the number that you choose.

2.Changing the port number for MySql server

                         Now do the same thiong for Mysql server. It is located in 

C:\\xampp\\mysql\\bin

named "my"(select and right click to view properties. Its an ini file). Open it with a text editor.Find 3306 and replace it with a well chosen and unique number at all the places(If u had changed the port number during installation or afterwards find that particular numbere and change it).

3.Starting the Apache server and testing it

Start the Apache server using the XMPP control panel and then test the apache local server by entering the url into the browser as you always did. But this time append localhost or 127.0.0.1 with 12 seperated by a semicolon, For ex : localhost:25 or 127.0.0.1:25 , if your new port number is 25 . And I think you will be good to go. If u have any further problems, feel free to ask....