[mythtv-users] What is HouseKeeperTask JobQueueRecover

[Raymond Wagner]

On 12/2/2013 7:12 PM, Mark Perkins wrote:
> Hopefully an easy question: What is the HouseKeeperTask 
> JobQueueRecover and what causes it to run?
>
> I assume the answer to the first part will be 'Recover job queue' but 
> hoping for a little more info.
>
> I had a user job running for a long time (basically a transcode script 
> that pauses in a queue until it is its turn to run in the transcode 
> queue). When it runs it checks for the presence of a temp directory 
> (to prevent multiple simultaneous identical jobs) and if the directory 
> is not present it creates it and then pauses waiting for other jobs in 
> front of it to finish. When it finally completes it deletes the temp 
> directory.
>
> A job I was running had been queued for a while (since Dec 2 
> 05:49:11). At Dec 3 10:17:33(some 29hrs later) the HouseKeeperTask 
> JobQueueRecover ran even though the script was happily in progress 
> (and still is, it was actually out of idle by that stage and was 
> transcoding). It immediately tried to rerun the script, which failed 
> because the temp directory to prevent multiple runs of the same script 
> on the same file was present. Even though there were multiple User 
> Jobs running at the time it was the only one to be restarted.
>
> Any idea's on where to look to see why the JobQueueRecover decided to 
> run? There is nothing at all in the logs for 16min before the 
> housekeeper ran. A couple of log entries below:
>
> Dec 2 05:49:11 mark-P5K-Deluxe mythbackend: mythbackend[9214]: I 
> UserJob_7351 jobqueue.cpp:2409 (DoUserJobThread) JobQueue: Started 
> MythTC FIFO Cut Export to NAS for Zodiac recorded from channel 1090 at 
> 2013-11-29T09:57:00Z
>
>
> ...
>
>
> Dec 3 10:17:33 mark-P5K-Deluxe mythbackend: mythbackend[9214]: I 
> CoreContext housekeeper.cpp:677 (Run) Queueing HouseKeeperTask 
> 'JobQueueRecover'.
>
> Dec 3 10:17:33 mark-P5K-Deluxe mythbackend: mythbackend[9214]: I 
> HouseKeeping housekeeper.cpp:133 (Run) Running HouseKeeperTask 
> 'JobQueueRecover'.
>
> Dec 3 10:17:33 mark-P5K-Deluxe mythbackend: mythbackend[9214]: I 
> HouseKeeping housekeeper.cpp:151 (Run) HouseKeeperTask 
> 'JobQueueRecover' Finished Successfully.
>
> Dec 3 10:17:48 mark-P5K-Deluxe mythbackend: mythbackend[9214]: I 
> UserJob_7351 jobqueue.cpp:2409 (DoUserJobThread) JobQueue: Started 
> MythTC FIFO Cut Export to NAS for Zodiac recorded from channel 1090 at 
> 2013-11-29T09:57:00Z
>
> Dec 3 10:17:49 mark-P5K-Deluxe mythbackend: mythbackend[9214]: E 
> UserJob_7351 jobqueue.cpp:2444 (DoUserJobThread) JobQueue: User Job 
> 'mythTCfifodir_cut_export_nas.pl --file=1090_20131129095700.mpg 
> --verbose' failed.
>

The task looks through the JobQueue table for any job that is thought to 
be in some form of running state and has seen no activity in over 24 
hours.  It assumes something bad has happened, and re-queues the job.
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