title: Could not open mysql.plugin table. Some plugins may be not loaded
body: <p>I have an issue with MySQL. When I'm trying to start it, that gives me an error message, which is</p>
  
  <pre class="lang-none prettyprint-override"><code>2015-12-10 10:52:31 13f4 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.
  2015-12-10 10:52:31 5108 [Note] InnoDB: Using mutexes to ref count buffer pool pages
  2015-12-10 10:52:31 5108 [Note] InnoDB: The InnoDB memory heap is disabled
  2015-12-10 10:52:31 5108 [Note] InnoDB: Mutexes and rw_locks use Windows interlocked functions
  2015-12-10 10:52:31 5108 [Note] InnoDB: Memory barrier is not used
  2015-12-10 10:52:31 5108 [Note] InnoDB: Compressed tables use zlib 1.2.3
  2015-12-10 10:52:31 5108 [Note] InnoDB: Not using CPU crc32 instructions
  2015-12-10 10:52:31 5108 [Note] InnoDB: Initializing buffer pool, size = 16.0M
  2015-12-10 10:52:31 5108 [Note] InnoDB: Completed initialization of buffer pool
  2015-12-10 10:52:31 5108 [Note] InnoDB: Highest supported file format is Barracuda.
  2015-12-10 10:52:31 5108 [Note] InnoDB: The log sequence numbers 1902092 and 1902092 in ibdata files do not match the log sequence number 1902102 in the ib_logfiles!
  2015-12-10 10:52:31 5108 [Note] InnoDB: Database was not shutdown normally!
  2015-12-10 10:52:31 5108 [Note] InnoDB: Starting crash recovery.
  2015-12-10 10:52:31 5108 [Note] InnoDB: Reading tablespace information from the .ibd files...
  2015-12-10 10:52:31 5108 [Note] InnoDB: Restoring possible half-written data pages 
  2015-12-10 10:52:31 5108 [Note] InnoDB: from the doublewrite buffer...
  2015-12-10 10:52:31 5108 [Note] InnoDB: 128 rollback segment(s) are active.
  2015-12-10 10:52:31 5108 [Note] InnoDB: Waiting for purge to start
  2015-12-10 10:52:32 5108 [Note] InnoDB:  Percona XtraDB (http://www.percona.com) 5.6.26-74.0 started; log sequence number 1902102
  2015-12-10 10:52:32 1760 [Note] InnoDB: Dumping buffer pool(s) not yet started
  2015-12-10 10:52:32 5108 [Note] Plugin 'FEEDBACK' is disabled.
  2015-12-10 10:52:32 5108 [ERROR] Could not open mysql.plugin table. Some plugins may be not loaded
  2015-12-10 10:52:32 5108 [ERROR] Can't open and lock privilege tables: Table 'mysql.servers' doesn't exist
  2015-12-10 10:52:32 5108 [Note] Server socket created on IP: '::'.
  2015-12-10 10:52:32 5108 [ERROR] Fatal error: Can't open and lock privilege tables: Table 'mysql.user' doesn't exist
  </code></pre>
  
  <p>I changed to InnoDB yesterday, but no problems were found. Any ideas?</p>