MySQL startup error "bind on tcp/ip port: address already in use"

Initiate error reporting “Bind on TCP/IP port: Address already in use”

Problem description ：
mysql Boot failure , see err journal

# tail -f /database/umc/data/umc.err
141106 10:37:14 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use
141106 10:37:14 [ERROR] Do you already have another mysqld server running on port: 3306 ?

Cause analysis ：
port 3306 occupied

Use command ：
ps -aux | grep mysql
Found that there was no 3306 Port of mysql process .

Use command ：netstat –apn 
Check all process and port usage . Find the following list of processes , The last column is PID/Program name 

# netstat -apn  | grep 3306    
tcp        0      0 ::ffff:192.168.65.211:3306  ::ffff:192.168.65.211:3306  ESTABLISHED 18148/java 

Find out 3306 The port is PID by 18148 Of Java Process occupation .

Further use of the command ：ps -aux | grep java, Or directly ：ps -aux | grep pid see
It's clear that 3306 The port is occupied by which program ！ Then judge whether to use KILL Order to kill ！
 
# start-up mysql
Observe

# netstat -anp  | grep 3306 
tcp        0      0 :::3306                     :::*                        LISTEN      16511/mysqld        
tcp        0      0 ::ffff:192.168.65.211:3306  ::ffff:192.168.65.211:4840  ESTABLISHED 16511/mysqld        
tcp        0      0 ::ffff:192.168.65.211:3306  ::ffff:192.168.65.211:4841  ESTABLISHED 16511/mysqld        
tcp        0      0 ::ffff:192.168.65.211:3306  ::ffff:192.168.65.211:4842  ESTABLISHED 16511/mysqld        
tcp        0      0 ::ffff:192.168.65.211:3306  ::ffff:192.168.65.211:4837  ESTABLISHED 16511/mysqld        
tcp        0      0 ::ffff:192.168.65.211:3306  ::ffff:192.168.65.211:4838  ESTABLISHED 16511/mysqld        
tcp        0      0 ::ffff:192.168.65.211:4837  ::ffff:192.168.65.211:3306  ESTABLISHED 17632/java          
tcp        0      0 ::ffff:192.168.65.211:4838  ::ffff:192.168.65.211:3306  ESTABLISHED 17632/java          
tcp        0      0 ::ffff:192.168.65.211:4840  ::ffff:192.168.65.211:3306  ESTABLISHED 17632/java          
tcp        0      0 ::ffff:192.168.65.211:4841  ::ffff:192.168.65.211:3306  ESTABLISHED 17632/java          
tcp        0      0 ::ffff:192.168.65.211:4842  ::ffff:192.168.65.211:3306  ESTABLISHED 17632/java