Fixed a bug in the default value of the config option record.size.max.bytes

see: https://github.com/apache/flink/blob/release-1.20.3/flink-connectors/flink-connector-base/src/main/java/org/apache/flink/connector/base/sink/writer/AsyncSinkWriter.java#L363-L366

Signed-off-by: Pei Yu <125331682@qq.com>

Author: sd4324530

docs/content.zh/docs/connectors/pipeline-connectors/elasticsearch.md

@@ -160,7 +160,7 @@ Pipeline Connector Options
     <tr>
       <td>record.size.max.bytes</td>
       <td>optional</td>
-      <td style="word-wrap: break-word;">10485760</td>
+      <td style="word-wrap: break-word;">5242880</td>
       <td>Long</td>
       <td>单个记录的最大大小（以byte为单位）。</td>
     </tr>

docs/content/docs/connectors/pipeline-connectors/elasticsearch.md

@@ -160,7 +160,7 @@ Pipeline Connector Options
     <tr>
       <td>record.size.max.bytes</td>
       <td>optional</td>
-      <td style="word-wrap: break-word;">10485760</td>
+      <td style="word-wrap: break-word;">5242880</td>
       <td>Long</td>
       <td>The maximum size of a single record in bytes.</td>
     </tr>

flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-elasticsearch/src/main/java/org/apache/flink/cdc/connectors/elasticsearch/sink/ElasticsearchDataSinkOptions.java

@@ -74,7 +74,7 @@ public class ElasticsearchDataSinkOptions {
     public static final ConfigOption<Long> MAX_RECORD_SIZE_IN_BYTES =
             ConfigOptions.key("record.size.max.bytes")
                     .longType()
-                    .defaultValue(10L * 1024L * 1024L)
+                    .defaultValue(5L * 1024L * 1024L)
                     .withDescription("The maximum size of a single record in bytes.");
 
     /** The version of Elasticsearch to connect to. */