Hi Geoffrey,

Thanks for your response.
Indeed I use Simulated Annealing with maximumSecondsSpend. So that explains the randomness of the LocalSearchPhase.
Sorry for not remembering.

Can you tell me please some more on "Use of HashSet in your Solution class"?
Do you mean a planning fact as a HashSet?
I have some HashMap fields in my Solution (which I also pass in the cloneSolution method) but non of these fields are planning variables/entity.

Regards,
Michiel

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    From: Geoffrey De Smet <ge0ffrey.spam@gmail.com>
 To: Rules Users List <rules-users@lists.jboss.org> 
 Sent: Tuesday, February 12, 2013 12:29 PM
 Subject: Re: [rules-users] planner environmentMode
  
    Common causes:

    - Use of HashSet in your Solution class.

    - Combination of Simulated Annealing with time spend termination
    (clearly documented in manual)

Op 12-02-13 12:08, Michiel Vermandel
      schreef:

Hi,

Using
            Planner 5.5.0-Final, currently my environmentMode is set to
            DEBUG.
As I read here
          (http://docs.jboss.org/drools/release/5.5.0.Final/drools-planner-docs/html_single/#d0e3120)
          this mode should produce a reproducible result.

          Though, even with o nly the construction phase enabled, I get
          different results from sequential runs on the same machine
          with the same code.

          Of course full solution (with LocalSearch) results in
          different outcome too.

          How is this possible?

          Thanks

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