From 400e6454302f69b0c76a9e1dc255552d344d22b0 Mon Sep 17 00:00:00 2001
From: Sunjeet Singh <sstattla@yahoo.com>
Date: Thu, 19 Dec 2024 19:46:16 -0800
Subject: [PATCH] (contd.) fix: if the max ordinal for a map value is zero then
 reserve 1 bit for it instead of nothing

---
 .../com/netflix/hollow/core/write/HollowMapTypeWriteState.java  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/hollow/src/main/java/com/netflix/hollow/core/write/HollowMapTypeWriteState.java b/hollow/src/main/java/com/netflix/hollow/core/write/HollowMapTypeWriteState.java
index 8167d993c..2b94f63e1 100644
--- a/hollow/src/main/java/com/netflix/hollow/core/write/HollowMapTypeWriteState.java
+++ b/hollow/src/main/java/com/netflix/hollow/core/write/HollowMapTypeWriteState.java
@@ -185,7 +185,7 @@ private void calculateNumShards() {
         }
 
         long bitsPerKeyElement = 64 - Long.numberOfLeadingZeros(maxKeyOrdinal + 1);
-        long bitsPerValueElement = 64 - Long.numberOfLeadingZeros(maxValueOrdinal);
+        long bitsPerValueElement = maxValueOrdinal == 0 ? 1 : 64 - Long.numberOfLeadingZeros(maxValueOrdinal);
         long bitsPerMapSizeValue = 64 - Long.numberOfLeadingZeros(maxMapSize);
         long bitsPerMapPointer = 64 - Long.numberOfLeadingZeros(totalOfMapBuckets);