[mythtv-users] v31 Backend Killed Creating pipes for GWakeup

[Greg Oliver]

On Tue, Sep 1, 2020 at 12:59 PM jksjdevelop <jksjdevelop at gmail.com> wrote:

> Thanks for the suggestion the  limit seems to be 1000 which sounds a lot
>
> $ ulimit -a
> time(seconds)        unlimited
> file(blocks)         unlimited
> data(kbytes)         unlimited
> stack(kbytes)        8192
> coredump(blocks)     0
> memory(kbytes)       unlimited
> locked memory(kbytes) 65536
> process              13858
> nofiles              1024
> vmemory(kbytes)      unlimited
> locks                unlimited
> rtprio               0
>

1024 is low - we usually use 4096 in our products.  Thing is - if it is
SystemD running the program, it can easily not use the PAM limits from
limits.conf.



> however lsof  | wc -l
>
> produces 33410
>
> monitoring the backend pid shows
>
> lsof -p 1672 | wc -l
> 5
>

It is not per pid if PAM based - it is system-wide per user.  33410 seems
wonky though - it must contain multiple lines per fopen - not sure - never
counted the output wholesale like that.  I would use `lsof -u <username>`



> I will monitor the number
> On 01/09/2020 14:27, Greg Oliver wrote:
>
> On Tue, Sep 1, 2020 at 6:04 AM John <jksjdevelop at gmail.com> wrote:
>
>> v31.0-81-g05a613f9fa
>>
>> Has anybody seen the backend fail like this before?
>>
>>  From the backend log
>>
>> Aug 31 22:06:37 tv systemd[1]: mythbackend.service: Main process exited,
>> code=killed, status=5/TRAP
>>
>>  From Syslog
>>
>> Aug 31 22:06:37 tv kernel: [15079.668950] show_signal: 29 callbacks
>> suppressed
>> Aug 31 22:06:37 tv kernel: [15079.668957] traps: MythSocketThrea[13492]
>> trap int3 ip:7ff07424d0d5 sp:7fed87c569a0 error:0 in
>> libglib-2.0.so.0.6400.3[7ff074211000+84000]
>> Aug 31 22:06:37 tv mythbackend[1690]: (process:1690): GLib-ERROR **:
>> 22:06:37.397: Creating pipes for GWakeup: Too many open files
>> Aug 31 22:07:12 tv systemd[1]: Stopped MythTV Backend.
>> Aug 31 22:07:12 tv systemd[1]: Started MythTV Backend.
>>
>
>
> su to your mythtv user and run `ulimit -a` and see how many open files are
> allowed in the user's security limits.
>
> 22:06:37.397: Creating pipes for GWakeup: Too many open files
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.mythtv.org/pipermail/mythtv-users/attachments/20200901/1eb98f29/attachment.htm>