[lttng-dev] More LTTng problems

[Henrik Hautakoski]

This problem has been fixed. It was a linux-header version missmatch
that caused the consumerd to not being able to connect to the error
socket.

On Mon, Aug 20, 2012 at 4:42 PM, David Goulet <dgoulet at efficios.com> wrote:
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>
> Hi,
>
> This is pretty odd... it seems the execl() of the consumer failed...
>
> We'll have to confirm this with the perror code I guess. Can you apply
> this patch and re-run again.
>
> diff --git a/src/bin/lttng-sessiond/main.c b/src/bin/lttng-sessiond/main.c
> index c952fc0..d3c378b 100644
> - --- a/src/bin/lttng-sessiond/main.c
> +++ b/src/bin/lttng-sessiond/main.c
> @@ -1782,6 +1782,7 @@ static pid_t spawn_consumerd(struct
> consumer_data *consumer_data)
>                     free(tmpnew);
>                }
>                if (ret) {
> +                   PERROR("execl 32-bit consumer");
>                     goto error;
>                }
>                break;
>
> If you want, to speed things up, you can come on OFTC irc server on
> #lttng and we'll be able to assist you in real time to find this problem.
>
> Cheers
> David
>
> Henrik Hautakoski:
>> Ok so I attached the output from lttng-sessiond (it's large).
>>
>> the commands was:
>>
>> # lttng-sessiond --vvv --no-kernel --verbose-consumer
>>
>> # lttng list -u
>>
>> # lttng create mysession
>>
>> # lttng enable-event -a -u
>>
>> Nothing shows up in dmesg.
>>
>> On Fri, Aug 17, 2012 at 5:15 PM, David Goulet
>> <dgoulet at efficios.com> wrote: Hi,
>>
>> Actually, this error means that a problem occurred *during* the 32
>> bit consumer spawning process... It seems the binary was found but
>> failed to exec it.
>>
>> Running the session daemon (lttng-sessiond) with options "-vvv
>> --verbose-consumer" will help us pin down the problem.
>>
>> Send me back the output, I'll be able to tell you what's going on
>> (and also the series of command you guys did before the
>> enable-event).
>>
>> Last thing, make sure the lttng-consumerd did not segfault (dmesg)
>> or any other lttng-tools component.
>>
>> Thanks! David
>>
>> Mathieu Desnoyers:
>>>>> It looks like you did not build a 32-bit consumer. I'm ccing
>>>>> David Goulet, maintainer of lttng-tools.
>>>>>
>>>>> Thanks,
>>>>>
>>>>> Mathieu
>>>>>
>>>>> * Henrik Hautakoski (henrik at fiktivkod.org) wrote:
>>>>>> Hi. got lttng working now. but when given the following
>>>>>> command, we get an error.
>>>>>>
>>>>>> $ lttng enable-event -a -u Error: Events: 32-bit UST
>>>>>> consumer start failed (channel channel0, session
>>>>>> mysession)
>>>>>>
>>>>>> Could not find any information about this error massage. do
>>>>>> you have any ideas?
>>>>>>
>>>>>> -- Henrik Hautakoski henrik at fiktivkod.org
>>>>>
>>
>>
>>
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-- 
Henrik Hautakoski
henrik at fiktivkod.org