diff --git a/core/src/main/scala/org/apache/spark/storage/BlockObjectWriter.scala b/core/src/main/scala/org/apache/spark/storage/BlockObjectWriter.scala
index 32d2dd06943a0..0a32df7c8910a 100644
--- a/core/src/main/scala/org/apache/spark/storage/BlockObjectWriter.scala
+++ b/core/src/main/scala/org/apache/spark/storage/BlockObjectWriter.scala
@@ -101,6 +101,8 @@ class DiskBlockObjectWriter(
     def write(i: Int): Unit = callWithTiming(out.write(i))
     override def write(b: Array[Byte]) = callWithTiming(out.write(b))
     override def write(b: Array[Byte], off: Int, len: Int) = callWithTiming(out.write(b, off, len))
+    override def close() = out.close()
+    override def flush() = out.flush()
   }
 
   private val syncWrites = System.getProperty("spark.shuffle.sync", "false").toBoolean