[mythtv-commits] Ticket #13068: Scheduler crashes before recording starts after backend has been running for a few days

[MythTV]

#13068: Scheduler crashes before recording starts after backend has been running
for a few days
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 Reporter:  WilliamDeRieux@…     |          Owner:  gigem
     Type:  Bug Report - Crash   |         Status:  new
 Priority:  major                |      Milestone:  0.28.2
Component:  MythTV - Scheduling  |        Version:  0.28.1
 Severity:  medium               |     Resolution:
 Keywords:                       |  Ticket locked:  0
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Comment (by WilliamDeRieux@…):

 Replying to [comment:1 WilliamDeRieux@…]:
 > Runnig with command...
 >
 > {{{
 > $ gdb --args mythbackend --loglevel debug -v schedule
 > }}}
 >
 > Produced a backtrace that was identicial to the one that I had already
 posted and the debug log output showed nothing different.
 >
 > It's happening when the Scheduler attempts to run the FillRecordingDir
 function...and it happens right before something is about to record.
 >
 > It crashed again about 22 hours after I opened this ticket.

 The crash seems to originate after the scheduler::run function tries to
 read the WakeUpThreshold setting.
 In my settings table no setting named WakeUpThreshold exists, so it would
 default to 300.

 {{{
 scheduler.cpp:2051 (in function void Scheduler::run(void))
 wakeThreshold =
     gCoreContext->GetNumSetting("WakeUpThreshold", 300);
 }}}

 In mythdbcon.cpp:427 (in function void
 MDBManager::PurgeIdleConnections(bool leaveOne))
 it deletes the idle DB connection

 Subsequently after the idle connections are closed the destructor is
 called in mythdbcon.cpp:102 (MSqlDatabase::~MSqlDatabase())

 which attempts to close the db connection -- after the connection had been
 deleted.
 ----------------------------------------

 I am no expert but I believe the db connection should be closed before it
 is deleted....

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Ticket URL: <https://code.mythtv.org/trac/ticket/13068#comment:2>
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