MySQL is not starting on Xampp Control Panel - php

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....