[mythtv-commits] Ticket #6332: "Unexpected DB Schema version" and "requires an updated database schema" errors are misleading

[MythTV]

#6332: "Unexpected DB Schema version" and "requires an updated database schema"
errors are misleading
------------------------------------------+---------------------------------
 Reporter:  tmetro+mythtv-bugs at gmail.com  |       Owner:  ijr       
     Type:  defect                        |      Status:  new       
 Priority:  minor                         |   Milestone:  unknown   
Component:  MythTV - General              |     Version:  0.21-fixes
 Severity:  medium                        |     Mlocked:  0         
------------------------------------------+---------------------------------
 When running 0.21.0+fixes19878-0ubuntu0+mythbuntu2 of the front-end
 configured with a database user that doesn't have LOCK TABLES privilege,
 the following messages get logged:

 {{{
 2009-03-04 21:50:19.569 Connected to database 'mythconverg' at host:
 mythtv.example.com
 2009-03-04 21:50:19.574 Using screen 0, 1920x1080 at 0,0
 QString::arg(): Argument missing: ERROR: Unable to acquire database
 upgrade lock, Driver error was [2/1044]:
 QMYSQL3: Unable to execute query
 Database error was:
 Access denied for user 'fringe'@'%' to database 'mythconverg'

 2009-03-04 21:50:19.614 ERROR: Unable to acquire database upgrade lock
 2009-03-04 21:50:19.618 Unexpected DB Schema version.  Waiting to see if
 DB is being upgraded.
 [..."Unable to acquire database upgrade lock" error repeated several
 times...]
 2009-03-04 21:50:24.670 ERROR: Unable to acquire database upgrade lock
 2009-03-04 21:50:24.675 Timed out waiting.
 2009-03-04 21:50:24.675 This version of MythTV requires an updated
 database schema.
  Please run mythtv-setup or mythbackend to update your database.
 }}}

 This conclusion - that the schema needs to be upgraded - is incorrect (and
 sent me on a wild goose chase for a while). The error handling logic in
 the code that acquires a lock on the schema version table needs to be
 clarified and corrected so that it aborts earlier for permanent failures
 (and never even gets to the code that attempts to test the schema version,
 if none was acquired), and produces a more accurate error of what failed.

-- 
Ticket URL: <http://svn.mythtv.org/trac/ticket/6332>
MythTV <http://www.mythtv.org/>
MythTV