diff --git a/dl4j-spark-examples/dl4j-spark-cluster/src/main/java/org/deeplearning4j/datasets/DatasetIteratorFromHdfs.java b/dl4j-spark-examples/dl4j-spark-cluster/src/main/java/org/deeplearning4j/datasets/DatasetIteratorFromHdfs.java
index a94016f78e..d68b2e2723 100644
--- a/dl4j-spark-examples/dl4j-spark-cluster/src/main/java/org/deeplearning4j/datasets/DatasetIteratorFromHdfs.java
+++ b/dl4j-spark-examples/dl4j-spark-cluster/src/main/java/org/deeplearning4j/datasets/DatasetIteratorFromHdfs.java
@@ -22,7 +22,7 @@
 
 import java.util.List;
 /**
- * @Description: TODO
+ * DatasetIteratorFromHdfs implements the methods in the DataSetIterator interface,this class mainly provides iteration of the data set.
  * @author wangfeng
  */
 public class DatasetIteratorFromHdfs  implements DataSetIterator {
diff --git a/dl4j-spark-examples/dl4j-spark-cluster/src/main/java/org/deeplearning4j/listeners/SparkScoreIterationListener.java b/dl4j-spark-examples/dl4j-spark-cluster/src/main/java/org/deeplearning4j/listeners/SparkScoreIterationListener.java
index 5ad0f3e614..d190689653 100644
--- a/dl4j-spark-examples/dl4j-spark-cluster/src/main/java/org/deeplearning4j/listeners/SparkScoreIterationListener.java
+++ b/dl4j-spark-examples/dl4j-spark-cluster/src/main/java/org/deeplearning4j/listeners/SparkScoreIterationListener.java
@@ -28,7 +28,7 @@
 import org.slf4j.LoggerFactory;
 
 /**
- *  @Description:TODO
+ *  In distributed training, there is a synchronization problem in the monitoring training process log.In order to solve this problem, this SparkScoreIterationListener extends BaseTrainingListener class.
  *  @author wangfeng
  */