[Routing] OSRM Flapping routes / non deterministic

[Florian Lohoff]

Hi,

On Mon, Feb 07, 2022 at 11:49:04AM +0100, Florian Lohoff wrote:
> Hi,
> i am monitoring routes by calculating the very same route over and over
> again with newer data (OSRM). Whenever something changes i get a mail.
> 
> I am currently using osrm v5.25.0-22-g73a2b9125 (Stretch does not have
> newer boost)
> 
> Now - I have some routes which flap - Every now and then (Sometimes
> multiple times a day). I am experiencing this for a long time also
> with OSRM v5.10.0-rc.2-739-ga53da9095 which i used before.

Okay - I think i found the issue. Using Contracted Hierarchies is non
deterministic. I switched to MLD and the flapping of the routes
disappeared.

Flo
-- 
Florian Lohoff                                                     f at zz.de
  Any sufficiently advanced technology is indistinguishable from magic.
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