Merge branch 'master' into doc-signoff

Author: zsoltgyulai94

doc/_admin-guide/070_Destinations/030_Elasticsearch-http/README.md

@@ -13,6 +13,18 @@ HTTPS connection, as well as password- and certificate-based
 authentication is supported. The content of the events is sent in JSON
 format.
 
+![]({{ site.baseurl}}/assets/images/caution.png) **CAUTION:** When a shard fails to respond to a read request, the coordinating node sends the request to another shard copy in the same replication group. Repeated failures can result in no available shard copies.
+{: .notice--warning}
+
+To ensure fast responses, the following APIs will respond with partial results if one or more shards fail:
+
+* Search
+* Multi Search
+* Bulk
+* Multi Get
+
+Responses containing partial results still provide a 200 OK HTTP status code. Shard failures are indicated by the timed_out and _shards fields of the response header.
+
 **Declaration**
 
 ```config