diff --git a/extensions/optaplanner/deployment/src/main/java/io/quarkus/optaplanner/deployment/OptaPlannerProcessor.java b/extensions/optaplanner/deployment/src/main/java/io/quarkus/optaplanner/deployment/OptaPlannerProcessor.java
index cf864b7907f03..833aaff995c2c 100644
--- a/extensions/optaplanner/deployment/src/main/java/io/quarkus/optaplanner/deployment/OptaPlannerProcessor.java
+++ b/extensions/optaplanner/deployment/src/main/java/io/quarkus/optaplanner/deployment/OptaPlannerProcessor.java
@@ -151,21 +151,7 @@ private void applySolverProperties(RecorderContext recorderContext,
         if (solverConfig.getEntityClassList() == null) {
             solverConfig.setEntityClassList(findEntityClassList(recorderContext, indexView));
         }
-        if (solverConfig.getScoreDirectorFactoryConfig() == null) {
-            ScoreDirectorFactoryConfig scoreDirectorFactoryConfig = new ScoreDirectorFactoryConfig();
-            scoreDirectorFactoryConfig.setEasyScoreCalculatorClass(
-                    findImplementingClass(EasyScoreCalculator.class, indexView));
-            scoreDirectorFactoryConfig.setConstraintProviderClass(
-                    findImplementingClass(ConstraintProvider.class, indexView));
-            scoreDirectorFactoryConfig.setIncrementalScoreCalculatorClass(
-                    findImplementingClass(IncrementalScoreCalculator.class, indexView));
-            ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
-            if (classLoader.getResource(SolverBuildTimeConfig.DEFAULT_SCORE_DRL_URL) != null) {
-                scoreDirectorFactoryConfig.setScoreDrlList(Collections.singletonList(
-                        SolverBuildTimeConfig.DEFAULT_SCORE_DRL_URL));
-            }
-            solverConfig.setScoreDirectorFactoryConfig(scoreDirectorFactoryConfig);
-        }
+        applyScoreDirectorFactoryProperties(indexView, solverConfig);
         optaPlannerBuildTimeConfig.solver.environmentMode.ifPresent(solverConfig::setEnvironmentMode);
         optaPlannerBuildTimeConfig.solver.moveThreadCount.ifPresent(solverConfig::setMoveThreadCount);
         applyTerminationProperties(solverConfig);
@@ -208,6 +194,35 @@ private List<Class<?>> findEntityClassList(RecorderContext recorderContext, Inde
                 .collect(Collectors.toList());
     }
 
+    private void applyScoreDirectorFactoryProperties(IndexView indexView, SolverConfig solverConfig) {
+        if (solverConfig.getScoreDirectorFactoryConfig() == null) {
+            ScoreDirectorFactoryConfig scoreDirectorFactoryConfig = new ScoreDirectorFactoryConfig();
+            scoreDirectorFactoryConfig.setEasyScoreCalculatorClass(
+                    findImplementingClass(EasyScoreCalculator.class, indexView));
+            scoreDirectorFactoryConfig.setConstraintProviderClass(
+                    findImplementingClass(ConstraintProvider.class, indexView));
+            scoreDirectorFactoryConfig.setIncrementalScoreCalculatorClass(
+                    findImplementingClass(IncrementalScoreCalculator.class, indexView));
+            ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
+            if (classLoader.getResource(SolverBuildTimeConfig.DEFAULT_SCORE_DRL_URL) != null) {
+                scoreDirectorFactoryConfig.setScoreDrlList(Collections.singletonList(
+                        SolverBuildTimeConfig.DEFAULT_SCORE_DRL_URL));
+            }
+            if (scoreDirectorFactoryConfig.getEasyScoreCalculatorClass() == null
+                    && scoreDirectorFactoryConfig.getEasyScoreCalculatorClass() == null
+                    && scoreDirectorFactoryConfig.getConstraintProviderClass() == null
+                    && scoreDirectorFactoryConfig.getIncrementalScoreCalculatorClass() == null
+                    && scoreDirectorFactoryConfig.getScoreDrlList() == null) {
+                throw new IllegalStateException("No classes found that implement "
+                        + EasyScoreCalculator.class.getSimpleName() + ", "
+                        + ConstraintProvider.class.getSimpleName() + " or "
+                        + IncrementalScoreCalculator.class.getSimpleName() + ", nor a "
+                        + SolverBuildTimeConfig.DEFAULT_SCORE_DRL_URL + " resource.");
+            }
+            solverConfig.setScoreDirectorFactoryConfig(scoreDirectorFactoryConfig);
+        }
+    }
+
     private <T> Class<? extends T> findImplementingClass(Class<T> targetClass, IndexView indexView) {
         Collection<ClassInfo> classInfos = indexView.getAllKnownImplementors(
                 DotName.createSimple(targetClass.getName()));