[mythtv] [mythtv-commits] Ticket #8199: backend lockup on recording expiry

[Michael T. Dean]

On 03/17/2010 01:29 PM, MythTV wrote:
> #8199: backend lockup on recording expiry
> -------------------------------------+--------------------------------------
>   Reporter:  michael_zanetti          |       Owner:  danielk
>       Type:  defect                   |      Status:  infoneeded_new
>   Priority:  trivial                  |   Milestone:  unknown
> Component:  MythTV - Recording       |     Version:  0.22-fixes
>   Severity:  medium                   |     Mlocked:  0
> -------------------------------------+--------------------------------------
>
> Comment(by anonymous):
>
>   I check the backend log on nearly every lockup. So far I can tell you that
>   there is nothing suspicious in there. But I ran the backend with the
>   default loglevel. The backend just stops logging at some point. Sometimes
>   the logs stop completely after the hangup. Sometimes there are still some
>   messages logged.
>
>   I have attached two example logs:
>
>   mythbackend.log.1 shows the last lockup I had. It happened directly after
>   exiting LiveTV.
>   mythbackend.log.2 shows a somewhat older failure. It happened on an
>   autoexpire event
>
>   Please note that in mythbackend.log.2 there are still some frontend
>   connect events from a frontend logged. Those entries happened _after_ the
>   backend locked up. The entries are there because I started and killed the
>   frontend a few times, which for obvious reasons hung too. The last entry
>   while the backend was working was the autoexpire one.
>
>   Those logs are created using the default log level. I just have
>   reconfigured my backend to log "all" messages and I will post future
>   lockups with hopefully more detailed informations.
>    

Which file system are you using for your recordings?  Is it ext3?  If 
so, did you not enable "Delete files slowly" in mythtv-setup?  A large 
I/O wait could conceivable cause the backend to hang sufficiently long 
to cause problems with the backend connections.

Mike