[lttng-dev] FW: relayd TCP reconnect?

Jesper Derehag jderehag at hotmail.com
Thu Mar 26 04:21:34 EDT 2015


Forwarding to lttng-dev as well..

----------------------------------------
> From: jderehag at hotmail.com
> To: jeremie.galarneau at efficios.com
> Subject: RE: [lttng-dev] relayd TCP reconnect?
> Date: Thu, 26 Mar 2015 08:20:52 +0000
>
> Great, added new RM issue:
> https://bugs.lttng.org/issues/883
>
> Thanks!
> /Jesper
>
> ----------------------------------------
>> Date: Wed, 25 Mar 2015 14:14:27 -0400
>> Subject: Re: [lttng-dev] relayd TCP reconnect?
>> From: jeremie.galarneau at efficios.com
>> To: jderehag at hotmail.com
>> CC: lttng-dev at lists.lttng.org
>>
>> On Wed, Mar 25, 2015 at 11:16 AM, Jesper Derehag <jderehag at hotmail.com> wrote:
>>> Hi All,
>>>
>>> I know the issue with relayd reconnects have been discussed earlier here:
>>> http://lists.lttng.org/pipermail/lttng-dev/2014-October/023650.html
>>>
>>> But has there been any further development on this?
>>> I would actually go as far as calling it a bug and submitting it to redmine tracker, but want to get approval here first.
>>>
>>
>> Hi Jesper,
>>
>> There has been no work done on this yet.
>>
>>> I would argue that its *always* a good idea to do reconnects due to that you really dont have any end-to-end control of the TCP flow.
>>> Some random router might decide to spuriously drop your connection, not to mention more modern queuing disciplines which might randomly throw away packets.
>>>
>>> On automated systems, that would mean that you have to somehow automagically detect that you got a disconnect, and then externally restart the session, which seems like a very weird workaround...
>>>
>>> I would be happy to file such a issue to the tracker if people thinks its a good idea, (and depending on if I have the time I *might* look into solving it myself).
>>> But it might be some time away in that case..
>>
>> Sure, feel free to open a ticket. We'll definitively have to look into
>> recovering gracefully at some point.
>>
>> Jérémie
>>
>>>
>>> Regards,
>>> Jesper
>>>
>>>
>>>
>>> _______________________________________________
>>> 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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