ChrisSamo632 commented on a change in pull request #5665:
URL: https://github.com/apache/nifi/pull/5665#discussion_r811409465



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File path: 
nifi-nar-bundles/nifi-elasticsearch-bundle/nifi-elasticsearch-restapi-processors/src/main/java/org/apache/nifi/processors/elasticsearch/PutElasticsearchRecord.java
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@@ -86,6 +96,16 @@
         resource = SystemResource.MEMORY,
         description = "The Batch of Records will be stored in memory until the 
bulk operation is performed.")
 public class PutElasticsearchRecord extends AbstractPutElasticsearch {
+    static final Relationship REL_FAILED_RECORDS = new Relationship.Builder()
+            .name("errors").description("If a \"Result Record Writer\" is set, 
any record that failed to process the way it was " +

Review comment:
       This isn't anything to do with the Record Writer output (success or 
failure), this is if the Elasticsearch `_bulk` API operation for the document 
(that was created from the Record read from the FlowFile) returns an `error: 
true` response (or, optionally, returns a 404 `not_found: true` response)
   
   The new `successful` (which I agree isn't a great name) relationship will 
then outputs all the other Records read from the input FlowFile where 
Elasticsearch **didn't** return an `error: true` response
   
   I agree the language for this Property Descriptor isn't great though (and so 
the same for `successful`, how about something like:
   
   > If a "Result Record Writer" is set, any Record(s) corresponding to 
Elasticsearch document(s) that resulted in an "error" (within Elasticsearch) 
will be routed here.




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