diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
index 019afbd1a1743..741239c953794 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/Client.scala
@@ -354,7 +354,7 @@ private[spark] class Client(
         val dir = new File(path)
         if (dir.isDirectory()) {
           dir.listFiles().foreach { file =>
-            if (!hadoopConfFiles.contains(file.getName())) {
+            if (file.isFile && !hadoopConfFiles.contains(file.getName())) {
               hadoopConfFiles(file.getName()) = file
             }
           }