Support Questions

Find answers, ask questions, and share your expertise
Check out our newest addition to the community, the Cloudera Data Analytics (CDA) group hub.

An input port inside a process group which has no UpStream connection causing High CPU utilization.

cpu-utilization-after.jpg test.xml cpu-utilization-before.jpg


I had setup a connection between "RouteOnAttribute" --> "test" processor group in the main worksheet. Later I deleted the connection between them by stopping both the processor and the processor group. Later, when I turned ON the processor group, the input port inside the "test" processor group is causing a High CPU utilization. I verified this by turning ON and OFF the port. Please find the screen shots attached also the sample template to test this condition.

Question: Is it a normal behaviour of NiFi.?

@Matt Burgess @Matt Clarke


@mattclarke. Can you please shed some light on this.!!

Master Guru

@Ghanashyam Srinivas


What you are seeing here has has been covered in


There is no reported fix for this issue yet.


Thank you,



If you found this answer addressed your question, please take a moment to login in and click the "ACCEPT" link

Take a Tour of the Community
Don't have an account?
Your experience may be limited. Sign in to explore more.