question Re: Issue with NetFlow v9 Processing in NiFi in Support Questions

Issue with NetFlow v9 Processing in NiFi

MarinaM — Wed, 12 Mar 2025 10:44:38 GMT

Hello,

We are forwarding NetFlow v9 data from a core switch and VPN to NiFi. In NiFi, we are using the NetFlow Listener processor to listen to the NetFlow traffic.

However, the processor is unable to process the data, and the only information we could find in the logs after enabling debug logging is the following:

2025-03-06 16:25:29,502 WARN com.cloudera.nifi.netflow.ListenNetFlow: ListenNetFlow[id=861330c9-6ffc-1e81-9978-be1bba4f3524] Sender [/0.0.0.0:00000] Cached Template ID [259] not found
2025-03-06 16:25:29,502 DEBUG com.cloudera.nifi.netflow.ListenNetFlow: ListenNetFlow[id=861330c9-6ffc-1e81-9978-be1bba4f3524] Sender [//0.0.0.0:00000] Version [9] FlowSet ID [259] Length [604]

Is there anyone faced such issue and help us to identify the cause of this issue and suggest possible solutions?

Thank you for your help.

Re: Issue with NetFlow v9 Processing in NiFi

haridjh — Wed, 12 Mar 2025 10:51:06 GMT

@MarinaM the template is sent from netflow server. we need to check when the template would be sent by netflow server and it can be cached on the collector end .(listenNetflow processor)

Re: Issue with NetFlow v9 Processing in NiFi

MarinaM — Thu, 13 Mar 2025 06:35:25 GMT

Hi @haridjh,

The server is supposed to stream all the NetFlow data to NiFi. However, why does the time delay between sending the NetFlow and receiving it in NiFi matter?