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

[Jérémie Galarneau]

Can you test whether or not you can reproduce this using the latest 2.5
release (lttng-tools 2.5.4 + lttng-ust 2.5.5)?
Jérémie

On Tue, Jul 7, 2015 at 2:23 PM, Dilong Zheng <Dilong.Zheng at mitel.com> wrote:

>  Hi,
>
> I'm using *LTTng v2.5.1 - Fumisterie*.
>
> I launched the session daemon manually using: lttng-sessiond -vvv and
> attempted to enable my UST events in another terminal (unsuccessfully). I
> have attached the contents of the sessiond log (please see
> *sessiondlog.txt*).
>
> 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 1:13 PM
>
> *To:* Dilong Zheng
> *Cc:* lttng-dev at lists.lttng.org
> *Subject:* Re: [lttng-dev] UST Create Channel Failed, Why?
>
>  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
>



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