[lttng-dev] Help-lttng-ust-pyhton

[Jérémie Galarneau]

The bad server command makes me wonder if you are using the official
LTTng 2.7.0 release.

Are you sure you don't have a stale UST or tools installation from master?
Also, the lttng-sessiond logs in verbose mode (-vvv) would be useful here.

Jérémie

On Thu, Nov 12, 2015 at 11:43 AM, Yves Junior Bationo
<yves-junior.bationo at polymtl.ca> wrote:
> Hi, i my script i just change "my-logger" by "hello-logger" (hello.py in
> attachment).
> I try to figure out the probem by
>                 export LTTNG_UST_PYTHON_DEBUG=1
> and i found this:
> #####
> [0.019155] LTTng-UST debug: <module>(): debug is enabled
> [0.024447] LTTng-UST debug: _init_threads(): entering
> [0.024710] LTTng-UST debug: _get_port_from_file(): reading port from file
> "/var/run/lttng/agent.port"
> [0.025745] LTTng-UST debug: _get_port_from_file(): reading port from file
> "/root/.lttng/agent.port"
> [0.025942] LTTng-UST debug: _init_threads(): system session daemon port:
> 5345
> [0.026117] LTTng-UST debug: _init_threads(): user session daemon port: None
> [0.026280] LTTng-UST debug: _init_threads(): creating system client thread
> [0.026762] LTTng-UST debug: _init_threads(): created and started system
> client thread
> [0.026973] LTTng-UST debug: _init_threads(): waiting for registration done
> (expecting 1, timeout is 5.0 s)
> [0.027721] LTTng-UST debug: _client_thread_target(): creating client
> "system" using TCP port 5345
> [0.029745] LTTng-UST debug: _client_thread_target(): starting client
> "system"
> [0.029896] LTTng-UST debug: run(): client "system": connecting to session
> daemon
> [0.030117] LTTng-UST debug: run(): client "system": registering to session
> daemon
> [0.030370] LTTng-UST debug: _recv_server_cmd_header(): client "system":
> received empty server command header
> [0.030532] LTTng-UST debug: _handle_server_cmd(): client "system": bad
> server command
> [0.030667] LTTng-UST debug: run(): client "system": got exception: 'module'
> object has no attribute '_ClientCmdReply'
> ####
> You can see 'bad server command' and 'exception' in the last lines.
>
> Jérémie Galarneau <jeremie.galarneau at efficios.com> a écrit :
>
>
>> 2015-11-06 17:59 GMT-05:00 Yves Junior Bationo
>> <yves-junior.bationo at polymtl.ca>:
>>>
>>>
>>> j'ai un souci avec lltngust pour les application python
>>> Pour l'exemple de la Doc
>>>         https://lttng.org/docs/#doc-python-application
>>> j'ai l'erreur:
>>>         No handlers could be found for logger "hello-logger"
>>>
>>
>> Hi Yves,
>>
>> We try to stick to English on this mailing list so the questions and
>> answers remain easily searchable.
>>
>> The example in the docs uses "time" without importing it, I have sent
>> a Pull Request to address that.
>> However, addressing the problem you are encountering, where does
>> "hello-logger" come from?
>>
>> Can you post the code and versions of the components you are using?
>>
>> Thanks,
>> Jérémie
>>
>>
>>> la commande "lttng list -u -a" me retourne bien la liste des trace point:
>>>
>>>         PID: 5228 - Name: python
>>>       lttng_python:event (loglevel: TRACE_DEBUG_LINE (13)) (type:
>>> tracepoint)
>>>       lttng_ust_tracelog:TRACE_DEBUG (loglevel: TRACE_DEBUG (14)) (type:
>>> tracepoint)
>>>       lttng_ust_tracelog:TRACE_DEBUG_LINE (loglevel: TRACE_DEBUG_LINE
>>> (13))
>>> (type: tracepoint)
>>>       lttng_ust_tracelog:TRACE_DEBUG_FUNCTION (loglevel:
>>> TRACE_DEBUG_FUNCTION (12)) (type: tracepoint)
>>>       lttng_ust_tracelog:TRACE_DEBUG_UNIT (loglevel: TRACE_DEBUG_UNIT
>>> (11))
>>> (type: tracepoint)
>>>       lttng_ust_tracelog:TRACE_DEBUG_MODULE (loglevel: TRACE_DEBUG_MODULE
>>> (10)) (type: tracepoint)
>>>       lttng_ust_tracelog:TRACE_DEBUG_PROCESS (loglevel:
>>> TRACE_DEBUG_PROCESS
>>> (9)) (type: tracepoint)
>>>       lttng_ust_tracelog:TRACE_DEBUG_PROGRAM (loglevel:
>>> TRACE_DEBUG_PROGRAM
>>> (8)) (type: tracepoint)
>>>       lttng_ust_tracelog:TRACE_DEBUG_SYSTEM (loglevel: TRACE_DEBUG_SYSTEM
>>> (7)) (type: tracepoint)
>>>       lttng_ust_tracelog:TRACE_INFO (loglevel: TRACE_INFO (6)) (type:
>>> tracepoint)
>>>       lttng_ust_tracelog:TRACE_NOTICE (loglevel: TRACE_NOTICE (5)) (type:
>>> tracepoint)
>>>       lttng_ust_tracelog:TRACE_WARNING (loglevel: TRACE_WARNING (4))
>>> (type:
>>> tracepoint)
>>>       lttng_ust_tracelog:TRACE_ERR (loglevel: TRACE_ERR (3)) (type:
>>> tracepoint)
>>>       lttng_ust_tracelog:TRACE_CRIT (loglevel: TRACE_CRIT (2)) (type:
>>> tracepoint)
>>>       lttng_ust_tracelog:TRACE_ALERT (loglevel: TRACE_ALERT (1)) (type:
>>> tracepoint)
>>>       lttng_ust_tracelog:TRACE_EMERG (loglevel: TRACE_EMERG (0)) (type:
>>> tracepoint)
>>>       lttng_ust_tracef:event (loglevel: TRACE_DEBUG (14)) (type:
>>> tracepoint)
>>>       lttng_ust_statedump:end (loglevel: TRACE_DEBUG_LINE (13)) (type:
>>> tracepoint)
>>>       lttng_ust_statedump:debug_link (loglevel: TRACE_DEBUG_LINE (13))
>>> (type: tracepoint)
>>>       lttng_ust_statedump:build_id (loglevel: TRACE_DEBUG_LINE (13))
>>> (type:
>>> tracepoint)
>>>       lttng_ust_statedump:soinfo (loglevel: TRACE_DEBUG_LINE (13)) (type:
>>> tracepoint)
>>>       lttng_ust_statedump:start (loglevel: TRACE_DEBUG_LINE (13)) (type:
>>> tracepoint)
>>>
>>> Mais pas de resultats dans le repertoire des evenements lorsque j'active
>>> le
>>> tracage lttng.
>>>
>>> Resumé
>>>         Probleme 1 :No handlers could be found for logger
>>>                 je croyais que "import lttngust" devait gerer cette
>>> situation
>>>
>>>         Probleme 2: pas de resultats au tracage
>>> Merci.
>>>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> 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