diff --git a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
index 785650f371c7d..375f43f0867f4 100644
--- a/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
+++ b/core/src/main/java/org/apache/spark/unsafe/map/BytesToBytesMap.java
@@ -905,7 +905,6 @@ public LongArray getArray() {
   public void reset() {
     numKeys = 0;
     numValues = 0;
-    longArray.zeroOut();
     freeArray(longArray);
     while (dataPages.size() > 0) {
       MemoryBlock dataPage = dataPages.removeLast();