[mythtv-users] /find_orphans.py crashes mythbackend

[Stuart Auchterlonie]

On 02/09/16 14:02, Udo van den Heuvel wrote:
> On 02-09-16 11:35, Stephen Worthington wrote:
>>>>> Sep  1 17:31:15 recorder mythbackend: (process:29226): GLib-ERROR **:
>>>>> Creating pipes for GWakeup: Too many open files
>>>>>
>>>>> Does that help?
>>>>
> (...)
>>> The rest of that thread is about another cause for this message.
>>> In my case the running of /find_orphans.py as user mythtv crashes the
>>> backend.
>>> mythbackend should be able to handle 'stuff' happening.
>>
>> Yes, but find_orphans.py could just be the final straw - too many
>> files are already open when it is run, 
> 
> Can't the backend refuse when the limit is approaching?
> Who designed this interface?
> 
>> and running find_orphans.py
>> pushes mythbackend over the limit,
> 
> So it is find_orphans? Fixing stuff there would be a workaround as seen
> from this very error occurring everywhere; see google.
> 
>> triggering the crash.  But
>> find_orphans.py is likely not the cause of the problem.  The
>> underlying problem that is leaving open files around is what needs to
>> be fixed.
> 
> So it is in the same are as the memory leak(s)?
> These remain unaddressed for years now.

Which ones? I've squashed all that I could find.

> 
> This very problem (find_oprhans related) should be easily fixable when
> looking at the source.
> Developers know how find_orphans talks to the backend; developers know
> how the backend processes stuff there.
> Of course we can dig into the issue , pollute the system with
> debug-info, but the core issue is clear. It is not a crash but an
> unhandled out-of-filehandles type of situation by blindly accepting all
> input via the interface that find_orphans uses.
> 

How do you prove that without a backtrace, or at very least an
strace showing that the return code from a system call indicated
the out of file descriptor condition?

Regards
Stuart


> Kind regards,
> Udo
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