[mythtv] [0.25] SIGSEGV when EIT updating DB and channel change (sometimes empty file)

Angela Schmid angela.schmid at wolke7.net
Fri Apr 6 08:21:47 UTC 2012

> On 04/03/2012 01:43 PM, Angela Schmid wrote:
> >>> I have a reproducible problem and tried several 0.25-pre versions since the beginning of march. On a channel
> change for a recording and a running (or maybe just ending) EIT update to the DB I get a SIGSEGV, almost every
> second day. Twice I saw empty files created prior the crash of mythbackend.
> >>> Since I have these errors, I only activated one card, and allowing only one recording per card.
> >>> This crash happened after midnight, so maybe a new day of EIT data was received resulting in the crash.
> >> Got a chance to look over the back trace and it's definitely a bug in
> >> our code--the EIT scanner is not being shut down properly and is trying
> >> to change channel on a null TVRec.  It may be related to
> >> http://code.mythtv.org/trac/ticket/10016 , but at this point it makes
> >> sense to just create a new ticket for it.  Please attach your log file
> >> and back trace to the ticket (or let me know if it refuses to let you
> >> due to the spam filter--which might not be working properly after the
> >> move to the new server--and I can upload them for you).
> > Great. Both logs uploaded successfully, had to unzip gdb.txt.zip to gdb.txt.
> >
> > http://code.mythtv.org/trac/ticket/10541
> Looks good, thanks.  Unzipped is easier, anyway, since we can look at
> the backtrace directly on trac without having to download and unzip the
> file to a local system.
> Mike

Thanks Angela for pointing to the interference with EIT. 
This problem made me crazy and I spent a lot of time. I don't know how many times I upgraded, reconfigured cards and channels. 
When I added EIT debugging, since the last two days, I had the same output to confirm this problem. I had six crashes since, every
time when a new bulk of EIT data is processed and a recording starts.
Hope this gets fixed soon as the 0.25 is planned for the 9th and many will be disappointed when Myth crashes and producing empty


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