@udayabaski, as @steven-matison mentioned, the best solution would be to use the Distributed Map Cache. In order to implement it, you can follow these steps to initialize your Server: https://stackoverflow.com/questions/44590296/how-does-one-setup-a-distributed-map-cache-for-nifi/44591909#44591909   Now, regarding the way you want to incorporate it in your flow, I would suggest the following: - right after UpdateAttribute, you activate the PutDistributedMapCache. Within the processor, you will set the desired attribute at the property Cache Entry Identified. - Before InvokeHTTP, you add a FetchDistributedMapCache with which you extract the value for your key:value pair. All you have to do next is to extract your attribute to further use in your invokeHTTP.   It is as simple as that and you do not need any fancy configurations 🙂 ... View more