[lttng-dev] lttng load misbehaving

Thu Dec 15 16:56:09 UTC 2016

Hi,

On 2016-12-15 11:36 AM, Thibault, Daniel wrote:
>     I've just had the weirdest thing happen.  I'm running three copies of the same VM (Ubuntu 14.04.4 with LTTng 2.8.0) and the same LTTng trace capture script, the only variation being adjustments to the trace storage path to accommodate slightly different shared folder arrangements between the VM and its host.
>
>     On one machine, after I edited ~/.lttng/<session-name>.lttng to change its sessions: session: output: consumer_output: destination: path member, having lttng load the session resulted in the previous path being used (I can see this by doing 'lttng load <session-name>' and then 'lttng list <session-name>').

You might not have saved the edited file.

>    Bizarre!  This did not happen on the other machines, so I'm really unsure if its reproducible.  Is there some kind of caching possibly going on?

Not that I know of.

>    How would I go about investigating this?  (I've taken a snapshot of the VM just in case)

Well a good start would be to reproduce.

Cheers.

>
> Daniel U. Thibault, M.Sc.²
>
> Informaticien scientifique, CME-PSC, Centre de recherches de Valcartier
> Recherche et développement pour la défense Canada / Gouvernement du Canada
> daniel.thibault at drdc-rddc.gc.ca / Tél: 418-844-4000x4245 Téléc: 418-844-4538
> daniel.thibault at forces.gc.ca / Tél: 418-844-4000x4245 Téléc: 418-844-4538
>
> Computer Scientist, MCCS-SPC, Valcartier Research Centre
> Defence Research and Development Canada / Government of Canada
> daniel.thibault at drdc-rddc.gc.ca / Tel: 418-844-4000x4245 Fax: 418-844-4538
> daniel.thibault at forces.gc.ca / Tel: 418-844-4000x4245 Fax: 418-844-4538
>
> DRDC is an agency of the Department of National Defence / RDDC est une agence du ministère de la Défense nationale
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-- 
Jonathan R. Julien
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