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

Yves Junior Bationo yves-junior.bationo at polymtl.ca
Fri Nov 13 13:02:59 EST 2015 

Hi,
with 'lttng enable-event -p -a' nothing is returned too.
ok i will wait for the problem to be fixed
THKs!

Jonathan Rajotte <jonathan.r.julien at gmail.com> a écrit :

> Hi Yves,
>
> You might want to enable all the python events via
> 'lttng enable-event -p -a'.
>
> Cheers!
>
> On Fri, Nov 13, 2015 at 10:46 AM, Yves Junior Bationo <
> yves-junior.bationo at polymtl.ca> wrote:
>
>> Hi,
>> Adding "logging.basicConfig()" seems to work well. "lttng list -u -a"
>> return the list of all python log
>> BUT
>> after enabling all event trace (lttng enable-event -u -a)
>> the trace contain only  "lttng_ust_statedump" event, and not a single
>> event from the script (warning,error... )
>> THKs!
>> Yves
>>
>> Jonathan Rajotte Julien <Jonathan.rajotte-julien at efficios.com> a écrit :
>>
>>
>> Hi Yves,
>>>
>>> We are currently looking a little bit more into it. It might be an error
>>> in the documentation.
>>>
>>> The example report the same error without the 'import lttngust'. If you
>>> use python 3 it seems to work.
>>>
>>> This seems related to the logging.basicConfig() which provide as basic
>>> configuration for the root handler. See [1] for more info.
>>>
>>> For now you can simply add the logging.basicConfig() before everything.
>>> I'm not sure if this is a workaround or simply how logging in python
>>> works in general.
>>>
>>> Cheers!
>>>
>>> [1] https://docs.python.org/2/library/logging.html#logging.basicConfig
>>>
>>> On 2015-11-12 01:21 PM, Yves Junior Bationo wrote:
>>>
>>>> I installed liblttng-ust-dev from ppa:lttng/ppa
>>>> lttng version: (LTTng Trace Control) 2.7.0 - Herbe à Détourne
>>>>
>>>> Yves Junior Bationo <yves-junior.bationo at polymtl.ca> a écrit :
>>>>
>>>> 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
>>>>>>
>>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> lttng-dev mailing list
>>>> lttng-dev at lists.lttng.org
>>>> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>>>>
>>>
>>> --
>>> Jonathan R. Julien
>>> Efficios
>>>
>>
>>
>>
>>
>> _______________________________________________
>> lttng-dev mailing list
>> lttng-dev at lists.lttng.org
>> http://lists.lttng.org/cgi-bin/mailman/listinfo/lttng-dev
>>
>
>
>
> --
> Jonathan Rajotte Julien

More information about the lttng-dev mailing list