Bug #46486 warnings produced when running mysql_install_db

Description:
If we install recent community editions version of mysql then we get this warning.

090729 14:12:19 [Warning] Forcing shutdown of 2 plugins

This did not appear in 5.1.30, appears to be new in 5.1.31 and is still there in 5.1.36.

The root cause seems to be that mysqld complains when plugins are in a funny state during mysqld shutdown. For example, this occurs when the federated storage engine is disabled. When mysql_install_db runs, these warning messages are meaningless.

How to repeat:
n/a

Suggested fix:
there shouldn't be warnings when running MySQL out of the box

Thank you for the bug report.

miguel@lara:~$ dbs/5.1/libexec/mysqld
090730 17:52:59 [Note] Plugin 'FEDERATED' is disabled.
090730 17:52:59 [Note] Plugin 'ndbcluster' is disabled.
090730 17:53:00  InnoDB: Started; log sequence number 0 44233
090730 17:53:00 [Note] Event Scheduler: Loaded 0 events
090730 17:53:00 [Note] dbs/5.1/libexec/mysqld: ready for connections.
Version: '5.1.38-debug'  socket: '/tmp/mysql.sock'  port: 3306  Source distribution
090730 17:53:36 [Note] Got signal 15 to shutdown mysqld
090730 17:53:36 [Note] dbs/5.1/libexec/mysqld: Normal shutdown

090730 17:53:36 [Note] Event Scheduler: Purging the queue. 0 events
090730 17:53:36  InnoDB: Starting shutdown...
090730 17:53:37  InnoDB: Shutdown completed; log sequence number 0 44233
090730 17:53:37 [Warning] Forcing shutdown of 2 plugins
090730 17:53:37 [Note] dbs/5.1/libexec/mysqld: Shutdown complete

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/82313

3102 Kristofer Pettersson	2009-09-03
      Bug#46486 warnings produced when running mysql_install_db
      
      During start up some plugins are disabled by default. This caused an additional
      warning level message to be emitted as a result of a previous bug patch. Since
      there is risk of unnecessary confusion regarding the operation level of the server
      the redundant information is removed.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/82440

3103 Kristofer Pettersson	2009-09-04
      Bug#46486 warnings produced when running mysql_install_db
      
      Incremental patch part 2
      
      Removing dead code and changing a note level message to a warning.
     @ sql/sql_plugin.cc
        * Remove free_slots. The only purpose for this variable was to trigger
          a redundant warning message  and it failed.
        * Change the note level message about shutting down plugins which
          didn't end nicely to a warning level message. (If this shutdown
          fails and there still are reference counts in the plugin an
          additional error level message is emitted)

Pushed into 5.4.4-alpha (revid:alik@sun.com-20090914155317-m1g9wodmndzdj4l1) (version source revid:alik@sun.com-20090914155317-m1g9wodmndzdj4l1) (merge vers: 5.4.4-alpha) (pib:11)

Pushed into 5.4.4-alpha (revid:alik@sun.com-20090915134838-5nj3ycjfsqc2vr2f) (version source revid:alik@sun.com-20090915134742-ni3kbyxtevaoxez5) (merge vers: 5.4.4-alpha) (pib:11)

Cosmetic.

Pushed into 5.1.40 (revid:joro@sun.com-20091006073316-lea2cpijh9r6on7c) (version source revid:ingo.struewing@sun.com-20090916070128-6053el2ucp5z7pyn) (merge vers: 5.1.39) (pib:11)

Cosmetic fix. No changelog entry required.

Pushed into 5.1.41-ndb-7.1.0 (revid:jonas@mysql.com-20091218102229-64tk47xonu3dv6r6) (version source revid:jonas@mysql.com-20091218095730-26gwjidfsdw45dto) (merge vers: 5.1.41-ndb-7.1.0) (pib:15)

Pushed into 5.1.41-ndb-6.2.19 (revid:jonas@mysql.com-20091218100224-vtzr0fahhsuhjsmt) (version source revid:jonas@mysql.com-20091217101452-qwzyaig50w74xmye) (merge vers: 5.1.41-ndb-6.2.19) (pib:15)

Pushed into 5.1.41-ndb-6.3.31 (revid:jonas@mysql.com-20091218100616-75d9tek96o6ob6k0) (version source revid:jonas@mysql.com-20091217154335-290no45qdins5bwo) (merge vers: 5.1.41-ndb-6.3.31) (pib:15)

Pushed into 5.1.41-ndb-7.0.11 (revid:jonas@mysql.com-20091218101303-ga32mrnr15jsa606) (version source revid:jonas@mysql.com-20091218064304-ezreonykd9f4kelk) (merge vers: 5.1.41-ndb-7.0.11) (pib:15)

No changelog entry required