MartijnVisser commented on code in PR #23:
URL: 
https://github.com/apache/flink-connector-elasticsearch/pull/23#discussion_r1036889587


##########
docs/content/docs/connectors/datastream/elasticsearch.md:
##########
@@ -226,17 +226,60 @@ To use fault tolerant Elasticsearch Sinks, checkpointing 
of the topology needs t
 
 {{< tabs "d00d1e93-4844-40d7-b0ec-9ec37e73145e" >}}
 {{< tab "Java" >}}
+
+Elasticsearch 6:
+```java
+final StreamExecutionEnvironment env = 
StreamExecutionEnvironment.getExecutionEnvironment();
+env.enableCheckpointing(5000); // checkpoint every 5000 msecs
+
+Elasticsearch6SinkBuilder sinkBuilder = new Elasticsearch6SinkBuilder<String>()
+    .setDeliveryGuarantee(DeliveryGuarantee.AT_LEAST_ONCE)
+    .setHosts(new HttpHost("127.0.0.1", 9200, "http"))
+    .setEmitter(
+    (element, context, indexer) -> 
+    indexer.add(createIndexRequest(element)));

Review Comment:
   The documentation at 
https://nightlies.apache.org/flink/flink-docs-master/api/java/org/apache/flink/connector/elasticsearch/sink/Elasticsearch6SinkBuilder.html
 is correct from what I've understood



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