title: Mysql on XAMPP server wont start.
body: <p>I'm trying to start mysql server but it gives following error log. I tried to change port number. But it is no worth </p>
  
  <pre><code>2014-09-26 09:31:23 3880 [Note] Plugin 'FEDERATED' is disabled.
  2014-09-26 09:31:23 f34 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.
  2014-09-26 09:31:23 3880 [Note] InnoDB: Using atomics to ref count buffer pool pages
  2014-09-26 09:31:23 3880 [Note] InnoDB: The InnoDB memory heap is disabled
  2014-09-26 09:31:23 3880 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions
  2014-09-26 09:31:23 3880 [Note] InnoDB: Compressed tables use zlib 1.2.3
  2014-09-26 09:31:23 3880 [Note] InnoDB: Not using CPU crc32 instructions
  2014-09-26 09:31:23 3880 [Note] InnoDB: Initializing buffer pool, size = 16.0M
  2014-09-26 09:31:23 3880 [Note] InnoDB: Completed initialization of buffer pool
  2014-09-26 09:31:23 3880 [Note] InnoDB: Highest supported file format is Barracuda.
  2014-09-26 09:31:23 3880 [Note] InnoDB: Log scan progressed past the checkpoint lsn 3997169
  2014-09-26 09:31:23 3880 [Note] InnoDB: Database was not shutdown normally!
  2014-09-26 09:31:23 3880 [Note] InnoDB: Starting crash recovery.
  2014-09-26 09:31:23 3880 [Note] InnoDB: Reading tablespace information from the .ibd files...
  2014-09-26 09:31:24 3880 [Note] InnoDB: Restoring possible half-written data pages 
  2014-09-26 09:31:24 3880 [Note] InnoDB: from the doublewrite buffer...
  InnoDB: Doing recovery: scanned up to log sequence number 3997285
  2014-09-26 09:31:24 3880 [Note] InnoDB: 128 rollback segment(s) are active.
  2014-09-26 09:31:25 3880 [Note] InnoDB: Waiting for purge to start
  2014-09-26 09:31:25 3880 [Note] InnoDB: 5.6.16 started; log sequence number 3997285
  2014-09-26 09:31:25 3880 [Note] Server hostname (bind-address): '*'; port: 3306
  2014-09-26 09:31:25 3880 [Note] IPv6 is available.
  2014-09-26 09:31:25 3880 [Note]   - '::' resolves to '::';
  2014-09-26 09:31:25 3880 [Note] Server socket created on IP: '::'.
  2014-09-26 09:31:25 3880 [ERROR] Fatal error: Can't open and lock privilege tables: Incorrect file format 'user'
  </code></pre>