Disable sort optimization for HALF_FLOAT (#10999) (#11004)

(cherry picked from commit 448635f)

Signed-off-by: Chaitanya Gohel <gashutos@amazon.com>
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>
Co-authored-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

CHANGELOG.md

@@ -41,6 +41,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Add telemetry tracer/metric enable flag and integ test. ([#10395](https://github.com/opensearch-project/OpenSearch/pull/10395))
 - Performance improvement for Datetime field caching ([#4558](https://github.com/opensearch-project/OpenSearch/issues/4558))
 - Add instrumentation for indexing in transport bulk action and transport shard bulk action. ([#10273](https://github.com/opensearch-project/OpenSearch/pull/10273))
+- [BUG] Disable sort optimization for HALF_FLOAT ([#10999](https://github.com/opensearch-project/OpenSearch/pull/10999))
 
 ### Deprecated
 

server/src/main/java/org/opensearch/index/fielddata/IndexNumericFieldData.java

@@ -242,7 +242,7 @@ private XFieldComparatorSource comparatorSource(
                 assert !targetNumericType.isFloatingPoint();
                 source = new IntValuesComparatorSource(this, missingValue, sortMode, nested);
         }
-        if (targetNumericType != getNumericType()) {
+        if (targetNumericType != getNumericType() || getNumericType() == NumericType.HALF_FLOAT) {
             source.disableSkipping(); // disable skipping logic for cast of sort field
         }
         return source;