[Backport 2.x] Fix integer overflow for remaining index stats

CHANGELOG.md

@@ -16,6 +16,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 ### Removed
 
 ### Fixed
+- Fix integer overflow for variables in indices stats response ([#877](https://github.com/opensearch-project/opensearch-java/pull/877))
 
 ### Security
 

java-client/src/main/java/org/opensearch/client/opensearch/_types/QueryCacheStats.java

@@ -60,7 +60,7 @@ public class QueryCacheStats implements JsonpSerializable {
     @Nullable
     private final String memorySize;
 
-    private final int memorySizeInBytes;
+    private final long memorySizeInBytes;
 
     private final int missCount;
 
@@ -124,7 +124,7 @@ public final String memorySize() {
     /**
      * Required - API name: {@code memory_size_in_bytes}
      */
-    public final int memorySizeInBytes() {
+    public final long memorySizeInBytes() {
         return this.memorySizeInBytes;
     }
 
@@ -199,7 +199,7 @@ public static class Builder extends ObjectBuilderBase implements ObjectBuilder<Q
         @Nullable
         private String memorySize;
 
-        private Integer memorySizeInBytes;
+        private Long memorySizeInBytes;
 
         private Integer missCount;
 
@@ -248,7 +248,7 @@ public final Builder memorySize(@Nullable String value) {
         /**
          * Required - API name: {@code memory_size_in_bytes}
          */
-        public final Builder memorySizeInBytes(int value) {
+        public final Builder memorySizeInBytes(long value) {
             this.memorySizeInBytes = value;
             return this;
         }
@@ -299,7 +299,7 @@ protected static void setupQueryCacheStatsDeserializer(ObjectDeserializer<QueryC
         op.add(Builder::evictions, JsonpDeserializer.integerDeserializer(), "evictions");
         op.add(Builder::hitCount, JsonpDeserializer.integerDeserializer(), "hit_count");
         op.add(Builder::memorySize, JsonpDeserializer.stringDeserializer(), "memory_size");
-        op.add(Builder::memorySizeInBytes, JsonpDeserializer.integerDeserializer(), "memory_size_in_bytes");
+        op.add(Builder::memorySizeInBytes, JsonpDeserializer.longDeserializer(), "memory_size_in_bytes");
         op.add(Builder::missCount, JsonpDeserializer.integerDeserializer(), "miss_count");
         op.add(Builder::totalCount, JsonpDeserializer.integerDeserializer(), "total_count");