Hello @Chakra Sankaraiah As pointed in the previous comment you need to use 9300 as a port number since putElasticsearch processors uses the trasport client which is running on 9300. So, your ElasticSearch Hosts: localhost:9300 And if have filename property set by GetFile processor, then you should be able to use it (filename) as value for identifier attribute. Otherwise, if you dont care the value of identifier attribute and just want to unique value for each flowfile then simple use uuid of the flow file, as: Identifier Attribute: uuid Let me know if this helps!. Thanks, Amarnath ... View more