cannot reset random object in reset_parameters

src/boosting/dart.hpp

@@ -57,7 +57,6 @@ public:
     const std::vector<const Metric*>& training_metrics) {
     GBDT::ResetTrainingData(config, train_data, object_function, training_metrics);
     shrinkage_rate_ = 1.0;
-    random_for_drop_ = Random(gbdt_config_->drop_seed);
   }
 
   /*!

src/boosting/gbdt.cpp

@@ -46,7 +46,10 @@ void GBDT::ResetTrainingData(const BoostingConfig* config, const Dataset* train_
   }
   early_stopping_round_ = new_config->early_stopping_round;
   shrinkage_rate_ = new_config->learning_rate;
-  random_ = Random(new_config->bagging_seed);
+  // cannot reset seed, only create one time
+  if (gbdt_config_ == nullptr ) {
+    random_ = Random(new_config->bagging_seed);
+  }
 
   // create tree learner, only create once
   if (gbdt_config_ == nullptr) {

src/treelearner/serial_tree_learner.cpp

@@ -111,7 +111,6 @@ void SerialTreeLearner::ResetConfig(const TreeConfig* tree_config) {
   }
 
   histogram_pool_.ResetConfig(tree_config_, train_data_->num_features());
-  random_ = Random(tree_config_->feature_fraction_seed);
 }
 
 Tree* SerialTreeLearner::Train(const score_t* gradients, const score_t *hessians) {