Hello @shrujana    The ListenHTTP processor setups an internal Jetty server that listens for inbound http connections on the configured port.  It is not used to establish connections to external services. It may e helpful if you provide more detail about your use case(s) along with your current dataflow design specifics. How do you interface with your micro-services when not using NIFi? ... View more

Hello @girish6   Your first EL statement would work as well once you correct the single quote marks around the Z.  Many outside text editors end up messing up the single quotes, so the NiFi EL ends up being incorrect when you copy/paste. NiFi's EL editor built in to the processor property text blocks can help identify when the EL format is wrong. In above you can see your NiFi EL statement as copied and pasted on line 3. You'll notice the color coding indicates an issue with the function's input parameters. Line 1 has the properly formatted version of that same NiFi EL statement. Be careful when using copy paste from some external editors. Thank you, Matt ... View more

Hello @girish6,   NiFi Expression language does have a function that will increment a number, but it does not reset back to zero (unless you restart NiFi) and is incremented globally across call calls to that function.     So while this function will give each FlowFile a unique filename per NiFi node, there is no guarantee that they will be sequential or will start at 0 for new source zip file you extract.  If this works for your use case the NiFi Expression language statement would look like this in the UpdateAttribute processor: If you are just looking for filename uniqueness, a better solution may be to instead append the FlowFile's uniquely assigned UUID to the filename instead as follows:   Tips:  1. There is an expression language guide in the embedded help of your NiFi installation found by clicking on the global menu icon in upper right corner. 2. Within a NiFi processor property that support NiFi EL you can display a list of functions with details by typing "${" (signifies start of an EL statement) and then hold "Control" while clicking space bar.  This also works if you are mid statement and type ":"then "control" + click spacebar. Examples: file-${   (then cntrl+spacebar) ${uuid:  (then cntrl+spacebar) Hope this helps, Matt ... View more

@Soumya Ghosh 1. The DistibuteMapCacheServer (DMC server) has not direct linkage to a dataflow built in NiFi. Thus when creating a template of your flow from NiFi for the purpose of generating your MiNiFi yaml file, the DMC Server will not be included in the template. Only the DMC client service will be included. I have not tried to manually add the DMC server to the yaml file, but is likely possible. MiNiFi does not have a rest-api where you can send command to add additional components like you can do it NiFi. 2. The only way to host a DMC server is via a NIFi instance. There is not way to execute a NAR file. 3. A major limitation to using the DMC server is lack of HA. If the NiFi instance hosting the DMC server crashes you lost all your cached data (assuming crash is not recoverable. The recommended path is to configure you ListFile processor to use one of the other available external cache server that offer HA capability. These alternate cache service are setup independent of NiFi or MiNiFi and will offer you what you need to support using Entity tracking in your ListFile processor running on MiNiFi. Thank you, Matt If you found this answer addressed your question, please take a moment to login in and click the "ACCEPT" link. ... View more