@Kumar_  The more detail you can provide, the better chance with getting a response. Sharing details like: Version of NiFi being used. full error and stack trace logged in the nifi-app.log. processor configuration details (if applicable). Matt ... View more

@Kumar_  Check the configuration value boxes to see if you added a line return. If the configuration pop-up box shows more then just a "1" line then you have a lone return at the end of line "1".  Click on line to and hit delete to get rid of the line return if present. If you found any of the suggestions/solutions provided helped you with your issue, please take a moment to login and click "Accept as Solution" on one or more of them that helped. Thank you, Matt ... View more

@Green_ wrote: I've run into similar issues and haven't reached a clear conclusion either. It seems your have very high heap usage which might potentially be relevant.  Once we stop nifi then only it is reducing..there is no data in queue but it is in high heap only.. unable to understanding why it is not reducing automatically.. ... View more

Need to use apache-zookeeper  for external one. Once you use apache-zookeeper it will work. https://zookeeper.apache.org/releases.html ... View more