EPG update fails in multi-tuner setup when only 1 tuner in use

[janoonk]

By coincidence, while developing/testing my top movie recording plugin, I noticed that EPG update fails when a tuner is in use. I have HDHomeRun with 4 tuners and 3 were free (checked with both NextPVR Device Status and HDHomeRun tunerstatus webinterface. It was the first tuner that was in use by NextPVR recording RTL4 The Voice of Holland.
I have attached my log. In log you find that I have tried several times. Two times by setting the datetime of EPG update to a minute or so later than now, one time by pressing the Update EPG, one time by first emptying EPG and then doing an Update EPG (all from webinterface). During this whole time tuner 1 was in use recording.

Key entrypoints / timeline in log:
2021-01-22 20:04:07.239 [DEBUG][30] Setting '/Settings/General/EPGUpdateTime' to '20:05:00'
2021-01-22 20:06:48.478 [INFO][47] Finished updating EPG

2021-01-22 20:12:19.289 [DEBUG][47] Got request [172.17.0.1]: /services/service (system.epg.update)
2021-01-22 20:12:32.098 [INFO][60] Finished updating EPG

2021-01-22 20:13:35.144 [DEBUG][57] Got request [172.17.0.1]: /services/service (system.epg.empty)
2021-01-22 20:13:47.097 [DEBUG][76] Setting '/Settings/General/EPGUpdateTime' to '20:14:00'

2021-01-22 20:15:49.344 [INFO][24] Finished updating EPG

2021-01-22 20:40:37.038 [DEBUG][57] Got request [172.17.0.1]: /services/service (system.epg.update)
2021-01-22 20:40:46.725 [INFO][51] Finished updating EPG

[mvallevand]

That is why it is recommended to do EPG updates in off hours when nothing is scheduled.

Martin

[janoonk]

That is why it is recommended to do EPG updates in off hours when nothing is scheduled.

Martin

For 1 tuner devices that's a good advice... but in this case I have 3 tuners free!

[mvallevand]

Can you be more specific about when the problem occurred?

Martin

[janoonk]

Can you be more specific about when the problem occurred?

Martin

I wasn't really doing anything. I had the webinterface open plus the live sqlite nextpvr database in DB Browser.
I wanted to check something regarding the EPG so I wanted to update it. First by trying to set the time in the very near future so it got triggered. Then I noticed nothing changed in the EPG_EVENT table. Inside the logs I noticed 'tuner in use' and 'finished updating epg' in only 2 minutes. Previously this took like 45 minutes. Rest of my tries (forcing update in About screen) are described in first post.

I attached a full logfile with timestamps and every request and command I and NextPVR did. Plus I described in my first post what I was doing and the situation/state of NextPVR (the first of the 4 tuners was recording). What more do you need?

[sub]

EPG update fails in multi-tuner setup when only 1 tuner in use

Ultimately, it depends which tuner. The EPG source is tied to the tuner that was originally used to setup that channel. You may want to move that tuner further down the priority list, so that it's less likely to be chosen. (then update the EPG again, so recordings are rescheduled)

[janoonk]

EPG update fails in multi-tuner setup when only 1 tuner in use

Ultimately, it depends which tuner. The EPG source is tied to the tuner that was originally used to setup that channel. You may want to move that tuner further down the priority list, so that it's less likely to be chosen. (then update the EPG again, so recordings are rescheduled)

Okay that did the trick. I moved tuner 0 to the bottom using it’s down arrow icon in the Devices screen. I did a test recording 3 programs at once which caused tuner 1, 2 and 3 to get in recording state. Then I did a EPG update which triggered tuner 0 and that worked!
Thanks alot!