[ML] adjusting bwc serialization for feature_processor in data frame analytics (#61152)

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/dataframe/analyses/Classification.java

@@ -177,7 +177,7 @@ public class Classification implements DataFrameAnalysis {
         } else {
             randomizeSeed = Randomness.get().nextLong();
         }
-        if (in.getVersion().onOrAfter(Version.V_8_0_0)) {
+        if (in.getVersion().onOrAfter(Version.V_7_10_0)) {
             featureProcessors = Collections.unmodifiableList(in.readNamedWriteableList(PreProcessor.class));
         } else {
             featureProcessors = Collections.emptyList();
@@ -234,7 +234,7 @@ public class Classification implements DataFrameAnalysis {
         if (out.getVersion().onOrAfter(Version.V_7_6_0)) {
             out.writeOptionalLong(randomizeSeed);
         }
-        if (out.getVersion().onOrAfter(Version.V_8_0_0)) {
+        if (out.getVersion().onOrAfter(Version.V_7_10_0)) {
             out.writeNamedWriteableList(featureProcessors);
         }
     }

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/ml/dataframe/analyses/Regression.java

@@ -143,7 +143,7 @@ public class Regression implements DataFrameAnalysis {
         randomizeSeed = in.readOptionalLong();
         lossFunction = in.readEnum(LossFunction.class);
         lossFunctionParameter = in.readOptionalDouble();
-        if (in.getVersion().onOrAfter(Version.V_8_0_0)) {
+        if (in.getVersion().onOrAfter(Version.V_7_10_0)) {
             featureProcessors = Collections.unmodifiableList(in.readNamedWriteableList(PreProcessor.class));
         } else {
             featureProcessors = Collections.emptyList();
@@ -196,7 +196,7 @@ public class Regression implements DataFrameAnalysis {
         out.writeOptionalLong(randomizeSeed);
         out.writeEnum(lossFunction);
         out.writeOptionalDouble(lossFunctionParameter);
-        if (out.getVersion().onOrAfter(Version.V_8_0_0)) {
+        if (out.getVersion().onOrAfter(Version.V_7_10_0)) {
             out.writeNamedWriteableList(featureProcessors);
         }
     }

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/ml/dataframe/analyses/ClassificationTests.java

@@ -114,7 +114,7 @@ public class ClassificationTests extends AbstractBWCSerializationTestCase<Classi
             instance.getNumTopClasses(),
             instance.getTrainingPercent(),
             instance.getRandomizeSeed(),
-            version.onOrAfter(Version.V_8_0_0) ? instance.getFeatureProcessors() : Collections.emptyList());
+            version.onOrAfter(Version.V_7_10_0) ? instance.getFeatureProcessors() : Collections.emptyList());
     }
 
     @Override

x-pack/plugin/core/src/test/java/org/elasticsearch/xpack/core/ml/dataframe/analyses/RegressionTests.java

@@ -107,7 +107,7 @@ public class RegressionTests extends AbstractBWCSerializationTestCase<Regression
             instance.getRandomizeSeed(),
             instance.getLossFunction(),
             instance.getLossFunctionParameter(),
-            version.onOrAfter(Version.V_8_0_0) ? instance.getFeatureProcessors() : Collections.emptyList());
+            version.onOrAfter(Version.V_7_10_0) ? instance.getFeatureProcessors() : Collections.emptyList());
     }
 
     @Override