Raise error when unrecognized content token type is found while indexing

CHANGELOG.md

@@ -8,7 +8,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 - Expand fetch phase profiling to support inner hits and top hits aggregation phases  ([##18936](https://github.com/opensearch-project/OpenSearch/pull/18936))
 - Add temporal routing processors for time-based document routing ([#18920](https://github.com/opensearch-project/OpenSearch/issues/18920))
 - Implement Query Rewriting Infrastructure ([#19060](https://github.com/opensearch-project/OpenSearch/pull/19060))
-- The dynamic mapping parameter supports false_allow_templates ([#19065](https://github.com/opensearch-project/OpenSearch/pull/19065))
+- The dynamic mapping parameter supports false_allow_templates ([#19065](https://github.com/opensearch-project/OpenSearch/pull/19065) ([#19097](https://github.com/opensearch-project/OpenSearch/pull/19097)))
 - Add a toBuilder method in EngineConfig to support easy modification of configs([#19054](https://github.com/opensearch-project/OpenSearch/pull/19054))
 - Add StoreFactory plugin interface for custom Store implementations([#19091](https://github.com/opensearch-project/OpenSearch/pull/19091))
 - Use S3CrtClient for higher throughput while uploading files to S3 ([#18800](https://github.com/opensearch-project/OpenSearch/pull/18800))

server/src/main/java/org/opensearch/index/mapper/DocumentParser.java

@@ -886,7 +886,6 @@ private static Mapper.Builder<?> createBuilderFromDynamicValue(
             if (builder != null) {
                 return builder;
             }
-            return handleNoTemplateFound(dynamic, () -> null);
         }
         // TODO how do we identify dynamically that its a binary value?
         throw new IllegalStateException(