[mythtv] Ticket #10236: Mythbackend not shutting down correctly

[R. G. Newbury]

On 01/05/2012 08:34 PM, MythTV wrote:
> #10236: Mythbackend not shutting down correctly
> ----------------------------------+----------------------------
>   Reporter:  newbury@…             |          Owner:
>       Type:  Bug Report - General  |         Status:  new
>   Priority:  minor                 |      Milestone:  unknown
> Component:  MythTV - General      |        Version:  Trunk Head
>   Severity:  medium                |     Resolution:
>   Keywords:                        |  Ticket locked:  0
> ----------------------------------+----------------------------
> Changes (by beirdo):
>
>   * status:  closed =>  new
>   * type:  Patch - Bug Fix =>  Bug Report - General
>   * version:  Unspecified =>  Trunk Head
>   * resolution:  Invalid =>
>
>
> Comment:
>
>   Seems that the actual issue is that mythbackend won't shut down cleanly
>   for him, and seems (at first glance) to be perhaps related to checking if
>   a recording is damaged, keeping TVRec from shutting down.
>
>   From the follow-on discussion on the mailing list (by Karl Dietz)
>
>   here's a backtrace http://paste.ubuntu.com/794362/
>
>   mythbackend is keeping one cpu busy at that point in time and the
>   recordings view in mythweb shows one recording from yesterday as still
>   running, but no recorder is in use...
>
>   MythTV Version: v0.25pre-3937-g0297b3a =>  December 23rd, time to update?
>
>   MythTV Branch : master

Couple of things going on.
1) Yes the backend can cease to be/crash/die/hang. When it does, it 
generally leaves a pid file hanging around.
I contrived to start multiple copies, which of course should never happen.
2) So, I proposed to add a stanza to the fedora pre-start.sh script to 
kill all existing copies and produce a clean startup.
This proposal does nothing towards fixing the reasons for a 'ceased to 
be' parrot or other piece of software.
3) Turns out that myth does not provide that script. See the other 
message for that story.
Geoff