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** Changed in: mythtv
       Status: Confirmed => Unknown

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https://bugs.launchpad.net/bugs/330272

Title:
  mythbackend silently fails with QSqlQuery::exec: empty query

Status in MythTV:
  Unknown
Status in “mythtv” package in Ubuntu:
  Triaged

Bug description:
  Binary package hint: mythtv-backend

  Hi,

  Randomly and without warning, mythbackend will silently fail without
  actually exiting. From the moment of failure onwards, it is unable to
  perform any database queries, but will continue to serve data to some
  functions.

  The log will switch from normal logging, to errors pertaining to
  QSqlQuery::exec: failures, and Query failures. Such as -

  2009-01-23 20:40:14.676 Scheduled 76 items in 0.4 = 0.02 match + 0.40 place
  2009-01-23 20:42:15.071 MainServer::HandleAnnounce Monitor
  2009-01-23 20:42:15.075 adding: flat as a client (events: 0)
  QSqlQuery::exec: empty query
  QSqlQuery::exec: empty query
  QSqlQuery::exec: empty query

  I have been unable to ascertain the source of the problem, as it
  appears to happen whilst the system is not in use (ie, whilst at work,
  or late at night). I have aattached a more comprehensive log in case
  it may be useful.

  Regards

  Kyle

  The following information may apply...

  ii  libmyth-0.21-0                             0.21.0+fixes16838-0ubuntu3.1 Common library code for MythTV and add-on mo
  ii  libmyth-perl                               0.21.0+fixes16838-0ubuntu3.1 A PERL library to access some MythTV feature
  ii  mythtv-backend                             0.21.0+fixes16838-0ubuntu3.1 A personal video recorder application (serve
  ii  mythtv-backend-master                      0.21.0+fixes16838-0ubuntu3.1 Metapackage to setup and configure a "Master
  ii  mythtv-common                              0.21.0+fixes16838-0ubuntu3.1 A personal video recorder application (commo
  ii  mythtv-database                            0.21.0+fixes16838-0ubuntu3.1 A personal video recorder application (datab
  ii  mythtv-transcode-utils                     0.21.0+fixes16838-0ubuntu3.1 Utilities used for transcoding MythTV tasks
  ii  mythweb                                    0.21.0+fixes16838-0ubuntu2.1 Web interface add-on module for MythTV

  Linux flat 2.6.24-23-generic #1 SMP Mon Jan 26 00:13:11 UTC 2009 i686
  GNU/Linux

  Description:	Ubuntu 8.04.2
  Release:	8.04

  ii  libdbd-mysql-perl                          4.005-1                      A Perl5 database interface to the MySQL data
  ii  libmysqlclient15off                        5.0.51a-3ubuntu5.4           MySQL database client library
  ii  libqt3-mt-mysql                            3:3.3.8-b-0ubuntu3           MySQL database driver for Qt3 (Threaded)
  ii  mysql-client                               5.0.51a-3ubuntu5.4           MySQL database client (meta package dependin
  ii  mysql-client-5.0                           5.0.51a-3ubuntu5.4           MySQL database client binaries
  ii  mysql-common                               5.0.51a-3ubuntu5.4           MySQL database common files
  ii  mysql-server                               5.0.51a-3ubuntu5.4           MySQL database server (meta package dependin
  ii  mysql-server-5.0                           5.0.51a-3ubuntu5.4           MySQL database server binaries

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