[jboss-jira] [JBoss JIRA] (DROOLS-4849) SudokuExample cannot solve hard samples any more in Drools 7

[Didier Loiseau (Jira)]

Didier Loiseau created DROOLS-4849:
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             Summary: SudokuExample cannot solve hard samples any more in Drools 7
                 Key: DROOLS-4849
                 URL: https://issues.redhat.com/browse/DROOLS-4849
             Project: Drools
          Issue Type: Bug
    Affects Versions: 7.30.0.Final
            Reporter: Didier Loiseau
            Assignee: Mario Fusco


It appears {{SudokuExample}} is capable to resolve the Simple and Medium samples, but none of the Hard ones. They resolve a few cells but end with

{quote}
Sorry - can't solve this grid.
{quote}
in the console.

With explain = true, I can see that the "single" and "hidden single" rules fire (not always both, depends on the puzzle), but clearly when it stops, at least the latter should still fire for some cells.

There is also a small bug in the code, which is that the {{unsolvable}} flag is not reset during setup, so when you get the above error you also get it for any other example you solve afterwards.

I have checked with Drools 6.5.0.Final (checked out the examples from GitHub) and the solver works fine. The Sudoku example appears to be mostly the same though.

I am running the examples with Java 8 from IntelliJ or command line, if that matters. I tested this on 2 different machines.

It is a bit unfortunate because it is the first example in the GUI.

Full console output for sample Hard 1:
{code}
12:14:28.256 [main] INFO  o.d.c.k.b.impl.ClasspathKieProject.notifyKieModuleFound:133 - Found kmodule: file:/C:/Users/Public/Documents/projects/drools/drools-examples/target/classes/META-INF/kmodule.xml
12:14:30.424 [main] WARN  o.d.c.k.b.impl.ClasspathKieProject.getPomPropertiesFromFileSystem:322 - Unable to find pom.properties in /C:/Users/Public/Documents/projects/drools/drools-examples/target/classes
12:14:30.475 [main] INFO  o.d.c.k.b.impl.ClasspathKieProject.generatePomPropertiesFromPom:354 - Recursed up folders, found and used pom.xml C:\Users\Public\Documents\projects\drools\drools-examples\pom.xml
12:14:42.619 [AWT-EventQueue-0] WARN  o.d.c.k.builder.impl.KieBuilderImpl.packageNameForFile:394 - File 'org/drools/games/wumpus/server/paintCave.drl' is in folder 'org/drools/games/wumpus/server' but declares package 'org.drools.games.wumpus.server.view'. It is advised to have a correspondance between package and folder names.
12:14:42.632 [AWT-EventQueue-0] WARN  o.d.c.k.builder.impl.KieBuilderImpl.packageNameForFile:394 - File 'org/drools/games/wumpus/server/paintSensor.drl' is in folder 'org/drools/games/wumpus/server' but declares package 'org.drools.games.wumpus.server.view'. It is advised to have a correspondance between package and folder names.
12:14:42.687 [AWT-EventQueue-0] WARN  o.d.c.k.builder.impl.KieBuilderImpl.packageNameForFile:394 - File 'org/drools/games/wumpus/server/ui.drl' is in folder 'org/drools/games/wumpus/server' but declares package 'org.drools.games.wumpus.server.view'. It is advised to have a correspondance between package and folder names.
Validation complete.
       Col: 0     Col: 1     Col: 2     Col: 3     Col: 4     Col: 5     Col: 6     Col: 7     Col: 8     
Row 0:   2 4  7 9   2 4 6        4 67 9   23  6  9  --- 5 ---  --- 1 ---    3  67 9  --- 8 ---     4 67   
Row 1:  12    7 9  --- 8 ---  1    67 9   23  6  9  --- 4 ---   23  6     1 3  67 9    3  67 9  --- 5 --- 
Row 2:  1  4    9  1  456     --- 3 ---       6 89  --- 7 ---       6 8   --- 2 ---     4 6  9  1  4 6    
Row 3:  1234       1234       1  4       1   5  8   --- 6 ---      5 78       5 7       45 7    --- 9 --- 
Row 4:  --- 6 ---  --- 7 ---  --- 5 ---  --- 4 ---  --- 2 ---  --- 9 ---  --- 8 ---  --- 1 ---  --- 3 --- 
Row 5:  --- 8 ---  12 4       1  4    9  1   5      --- 3 ---      5 7        567       4567     2 4 67   
Row 6:  1 3   7    1 3  6     --- 2 ---    3 56     --- 8 ---    3 56     --- 4 ---    3 567 9  1    67   
Row 7:  --- 5 ---  1 34 6     1  4 678     3  6     --- 9 ---    34 6     1 3  67    --- 2 ---  1    678  
Row 8:    34       --- 9 ---     4 6 8   --- 7 ---  --- 1 ---   23456       3 56       3 56          6 8  

Sorry - can't solve this grid.
{code}



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