[lttng-dev] UST Create Channel Failed, Why?

[Jérémie Galarneau]

Which release of 2.5 are you using? You can find out using:
$ lttng version

Can you launch the session daemon manually in verbose-mode and provide the
logs?
$ lttng-sessiond -vvv

and enable your events in another terminal.

Thanks,
Jérémie


On Tue, Jul 7, 2015 at 11:28 AM, Dilong Zheng <Dilong.Zheng at mitel.com>
wrote:

>  Hi Jeremie,
>
>
>  Had some grammatical mistakes in my last email.... this should be
> clearer.
>
>
>  I am using LTTng v2.5. I am not explicitly creating any channels. I am
> only creating a session via: lttng create [session-name] . I used to
> always just create a session and then enable whichever available user
> tracepoint that I need (without explicitly creating any channels).
>
>
>  Thanks,
>
>
>  Dilong
>
>
>  ------------------------------
> *From:* Dilong Zheng
> *Sent:* Tuesday, July 7, 2015 11:26 AM
> *To:* Jérémie Galarneau
>
> *Cc:* lttng-dev at lists.lttng.org
> *Subject:* Re: [lttng-dev] UST Create Channel Failed, Why?
>
>
> Hi Jeremie,
>
>
>  I am using LTTng v2.5. I am not explicitly creating channels. I am only
> creating a session: lttng create [session-name] . It used to always just
> create a session and then enable whichever available user tracepoint that I
> need (which out explicitly creating any channels).
>
>
>  Thanks,
>
>
>  Dilong
>
>  ------------------------------
> *From:* jeremie.galarneau at gmail.com <jeremie.galarneau at gmail.com> on
> behalf of Jérémie Galarneau <jeremie.galarneau at efficios.com>
> *Sent:* Tuesday, July 7, 2015 11:20 AM
> *To:* Dilong Zheng
> *Cc:* lttng-dev at lists.lttng.org
> *Subject:* Re: [lttng-dev] UST Create Channel Failed, Why?
>
>  Hi Dilong,
>
>  How do you create this channel and using which version of LTTng?
>
>  Jérémie
>
> On Mon, Jul 6, 2015 at 2:11 PM, Dilong Zheng <Dilong.Zheng at mitel.com>
> wrote:
>
>>  Hi all,
>>
>>
>>  While trying to enable UST events, I get the following error message:
>>
>>
>>  Error: Event mitel:sem_wait_entry: UST create channel failed (channel
>> channel0, session mcdUST3)
>>
>>
>>  When I type: lttng list -u I am able to see a list of all my UST
>> tracepoints.
>>
>> Could someone please provide some insight as to why this error is
>> appearing and steps I could take to fix this error. Thanks.
>>
>>
>>
>>
>>
>> _______________________________________________
>> lttng-dev mailing list
>> lttng-dev at lists.lttng.org
>> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>>
>>
>
>
>  --
> Jérémie Galarneau
> EfficiOS Inc.
> http://www.efficios.com
>



-- 
Jérémie Galarneau
EfficiOS Inc.
http://www.efficios.com
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