I found these lines in log files
InnoDB: Unable to lock ./ibdata1, error: 11
InnoDB: Check that you do not already have another mysqld process
InnoDB: using the same InnoDB data or log files.
100109 1:10:43 InnoDB: Unable to open the first data file
InnoDB: Error in opening ./ibdata1
100109 1:10:43 InnoDB: Operating system error number 11 in a file operation.
InnoDB: Error number 11 means 'Resource temporarily unavailable'.
InnoDB: Some operating system error numbers are described at
InnoDB: Could not open or create data files.
InnoDB: If you tried to add new data files, and it failed here,
InnoDB: you should now edit innodb_data_file_path in my.cnf back
InnoDB: to what it was, and remove the new ibdata files InnoDB created
InnoDB: in this failed attempt. InnoDB only wrote those files full of
InnoDB: zeros, but did not yet use them in any way. But be careful: do not
InnoDB: remove old data files which contain your precious data!
100109 1:10:43 [ERROR] Can't start server: Bind on TCP/IP port: Address already in use
100109 1:10:43 [ERROR] Do you already have another mysqld server running on port: 3306 ?
100109 1:10:43 [ERROR] Aborting