Revert "[jvm-packages] update rabit, surface new changes to spark, add parity and failure tests (#4876)" (#4965)

This reverts commit 86ed01c4bb.

jvm-packages/xgboost4j/src/main/java/ml/dmlc/xgboost4j/java/Rabit.java

@@ -3,8 +3,6 @@ package ml.dmlc.xgboost4j.java;
 import java.io.Serializable;
 import java.nio.ByteBuffer;
 import java.nio.ByteOrder;
-import java.util.LinkedList;
-import java.util.List;
 import java.util.Map;
 
 /**
@@ -53,25 +51,18 @@ public class Rabit {
       throw new XGBoostError(XGBoostJNI.XGBGetLastError());
     }
   }
-  // used as way to test/debug passed rabit init parameters
-  public static Map<String, String> rabitEnvs;
-  public static List<String> mockList = new LinkedList<>();
+
   /**
    * Initialize the rabit library on current working thread.
    * @param envs The additional environment variables to pass to rabit.
    * @throws XGBoostError
    */
   public static void init(Map<String, String> envs) throws XGBoostError {
-    rabitEnvs = envs;
-    String[] args = new String[envs.size() + mockList.size()];
+    String[] args = new String[envs.size()];
     int idx = 0;
     for (java.util.Map.Entry<String, String> e : envs.entrySet()) {
       args[idx++] = e.getKey() + '=' + e.getValue();
     }
-    // pass list of rabit mock strings eg mock=0,1,0,0
-    for(String mock : mockList) {
-      args[idx++] =  "mock=" + mock;
-    }
     checkCall(XGBoostJNI.RabitInit(args));
   }
 

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/LabeledPoint.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/Booster.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/DMatrix.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/EvalTrait.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/ObjectiveTrait.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/XGBoost.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/rabit/RabitTracker.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/rabit/handler/RabitTrackerHandler.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/rabit/handler/RabitWorkerHandler.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/rabit/util/LinkMap.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/main/scala/ml/dmlc/xgboost4j/scala/rabit/util/RabitTrackerHelpers.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/test/scala/ml/dmlc/xgboost4j/scala/DMatrixSuite.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/test/scala/ml/dmlc/xgboost4j/scala/ScalaBoosterImplSuite.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.

jvm-packages/xgboost4j/src/test/scala/ml/dmlc/xgboost4j/scala/rabit/RabitTrackerConnectionHandlerTest.scala

@@ -1,5 +1,5 @@
 /*
- Copyright (c) 2014 - 2019 by Contributors
+ Copyright (c) 2014 by Contributors
 
  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.