[lttng-dev] LTTng 2.9 sessiond misbehaving

[Mathieu Desnoyers]

----- On Oct 5, 2016, at 3:51 PM, Thibault, Daniel Daniel.Thibault at drdc-rddc.gc.ca wrote:

> Interesting.  Rebuilt the entire LTTng set with the stable-1.8 releases
> (stable-0.9 for userspace-rcu) and I see the same behaviour:
> When I hit ctrl-c in the daemon's shell, it doesn't respond and the CPU usage
> goes crazy (~90%).  Can't sudo kill it (or lttng-runas) either.
> 
> What's strange is that if instead of:
> 
> $ lttng-sessiond -vvv 2>&1 | tee lttng-sessiond.2.log
> 
> I do:
> 
> $ lttng-sessiond 2>&1 | tee lttng-sessiond.3.log
> 
> Then ctrl-c terminates lttng-sessiond normally.
> 
> Using just the first level of verbosity:
> 
> $ lttng-sessiond -v 2>&1 | tee lttng-sessiond.4.log
> 
> also misbehaves.  Somehow -v is responsible?
> 
> At this point, should I open a bug?

Hi Daniel,

I've been able to reproduce, and just sent a fix to
Jérémie:

"Fix: ignore SIGPIPE"

Thanks,

Mathieu

> 
> Daniel U. Thibault, M.Sc.²
> 
> Informaticien scientifique, CME-PSC, Centre de recherches de Valcartier
> Recherche et développement pour la défense Canada / Gouvernement du Canada
> daniel.thibault at drdc-rddc.gc.ca / Tél: 418-844-4000x4245 Téléc: 418-844-4538
> daniel.thibault at forces.gc.ca / Tél: 418-844-4000x4245 Téléc: 418-844-4538
> 
> Computer Scientist, MCCS-SPC, Valcartier Research Centre
> Defence Research and Development Canada / Government of Canada
> daniel.thibault at drdc-rddc.gc.ca / Tel: 418-844-4000x4245 Fax: 418-844-4538
> daniel.thibault at forces.gc.ca / Tel: 418-844-4000x4245 Fax: 418-844-4538
> 
> DRDC is an agency of the Department of National Defence / RDDC est une agence du
> ministère de la Défense nationale
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-- 
Mathieu Desnoyers
EfficiOS Inc.
http://www.efficios.com