[lttng-dev] Error while enabling multiple channel for same session

[shirish gajera]

Hi Jérémie,

Machine where I got the error is already rebooted many times.

When you want me to launch the session daemon after getting error, after
running my script ?

Thanks.
Shirish

On Tue, May 5, 2015 at 4:13 PM, Jérémie Galarneau <
jeremie.galarneau at efficios.com> wrote:

> Hi Shirish,
>
> Interesting issue. It seems that the session daemon crashed at some point
> during the execution script. Can you launch the session daemon manually in
> verbose mode and provide the output along with the version of LTTng being
> used?
>
> Use:
> $ lttng-sessiond -vvv
>
> Also, can you check if a core dump is being generated?
>
> Regards,
> Jérémie
>
> On Thu, Apr 30, 2015 at 12:23 PM, shirish gajera <gajerashirish at gmail.com>
> wrote:
>
>> Hi,
>>
>> I want to enable multiple(50) channel for the same session, below is my
>> script doing the same.
>> Single channel with the same script  is working fine. But, when I tried
>> to enable multiple channel for the same session it's giving me error.
>>
>> Here is what I found
>> 1) I have 50 channel in my db files and it's failing at 13th channel
>> create command, below is the log
>>        ...12 channel creation successful
>>        Spawning a session daemon
>>        Warning: Could not get lock file
>> /var/run/lttng/lttng-sessiond.lck, another instance is running.
>>        Error: Session daemon died (exit status 1)
>>        Spawning a session daemon
>>        Warning: Could not get lock file
>> /var/run/lttng/lttng-sessiond.lck, another instance is running.
>>        Error: Session daemon died (exit status 1)
>>        1
>>        failed!
>>
>> Let me know if question is not clear.
>>
>> my lttng script
>> --------------------------------------------
>> lttng create -o /root/data/tracing --snapshot TEST
>> while IFS=, read EVENTNAME CHANNELNAME BUFFERSIZE
>> do
>> lttng enable-channel --userspace --tracefile-size ${BUFFERSIZE}K
>> --tracefile-count 1 --overwrite ${CHANNELNAME}
>> lttng enable-event -u ${EVENTNAME} --loglevel ERR -c ${CHANNELNAME}
>> lttng enable-event -u ${EVENTNAME} --loglevel CRIT -c ${CHANNELNAME}
>> done < demo_lttngdb
>> lttng start
>>
>>
>> my demo_lttngdb file
>> -------------------------------------------
>> channel1,channel1,65535
>> channel2*,channel2,4096
>> channel3*,channel3,4096
>> channel4*,channel4,4096
>> channel5*,channel5,4096
>> channel6*,channel6,4096
>> channel7*,channel7,4096
>> channel8*,channel8,4096
>> channel9*,channel9,8192
>> channel10*,channel10,4096
>> channel11*,channel11,4096
>> channel12*,channel12,4096
>> channel13*,channel13,4096
>> channel14*,channel14,4096
>> channel15*,channel15,4096
>> .............
>> .............
>> .............
>> channel48*,channel48,4096
>>
>> _______________________________________________
>> 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
>
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