fix comments

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

Author: sd4324530

flink-cdc-connect/flink-cdc-pipeline-connectors/flink-cdc-pipeline-connector-elasticsearch/src/main/java/org/apache/flink/cdc/connectors/elasticsearch/v2/Elasticsearch8AsyncWriter.java

@@ -169,6 +169,11 @@ private void handleFailedRequest(
         Throwable retryableError = error.getCause() != null ? error.getCause() : error;
         if (isRetryable(retryableError)) {
             resultHandler.retryForEntries(requestEntries);
+        } else {
+            resultHandler.completeExceptionally(
+                    retryableError instanceof Exception
+                            ? (Exception) retryableError
+                            : new FlinkRuntimeException(retryableError));
         }
     }