Bug#1012318: diffoscope 214 produced no output and was killed after running into timeout after 150m

[Mattia Rizzolo]

On Tue, Jun 07, 2022 at 03:17:12PM -0700, Vagrant Cascadian wrote:
> On 2022-06-06, Chris Lamb wrote:
> > Vagrant, do you have --profile output, out of interest? It would be
> > interesting, for instance, if the HTML generation was taking so long
> > that even if diffoscope stopped recursing into subarchives, it hit
> > Jenkins' hard timeout. This may suggest that there is a bug in the
> > HTML generation, and/or that the --timeout value on tests.r-b.org has
> > not been set low enough relative to the hard timeout.
> 
> Yeah, I think maybe we should add more time to the hard jenkins timeout
> to make sure it really gets *some* output.
> 
> The original was just the defaults that reprotest uses (perhaps we
> should add --profile?).

Just mentioning that we already call diffoscope with --profile on
jenkins, just that if it gets killed hard it won't print it out.

Furthermore, there are 6 minutes (i.e. 0.1 hours) between SIGTERM and
SIGKILL.  I don't know at which stage of this case diffoscope was
terminated, but perhaps it's one side that could be investiage: to make
diffoscope output something on SIGTERM when it still has a chance to
continue running.

> ## output (total time: 12.131s)
>       12.131s      1 call     text

vs

> ## output (total time: 413.571s)
> 413.571s      1 call     html

So it's not really the presenter that takes excessively.  But otoh 413
seconds are more than 6 minutes.  If somebody looks into the point above
I can change jenkins to wait 12 minutes (or 18) before KILLing after the
TERM signal.

-- 
regards,
                        Mattia Rizzolo

GPG Key: 66AE 2B4A FCCF 3F52 DA18  4D18 4B04 3FCD B944 4540      .''`.
More about me:  https://mapreri.org                             : :'  :
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