Mohammed Nadeem created NIFI-7559:
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Summary: NiFi Cluster page shows multiple entries for same node
identity
Key: NIFI-7559
URL: https://issues.apache.org/jira/browse/NIFI-7559
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework, Core UI
Affects Versions: 1.9.2, 1.9.1
Environment: Linux
Reporter: Mohammed Nadeem
Attachments: image-2020-06-19-02-01-35-512.png,
image-2020-06-19-02-50-27-674.png, image-2020-06-19-02-52-35-420.png
In a containerized environment, When a NiFi node doesn't meet health probes
performed by Kubelet (Kubernetes), then the node is killed and restarted. This
may loop continuously causing *NiFi Cluster page* ( Hamburger Menu -> Cluster )
to show multiple entries for the same node that gets restarted again and again.
To replicate the issue:
1. Setup single-node cluster ( statefulset application with replicaCount = 1)
2. Change configured probes such as Startup or Liveness to duration less than
regular node start up time .
3. Scale new node (replicaCount), for example from 1 to 2. Then new scaled node
*node-1* gets killed and restarted continuously by kubelet .
Please check the screenshot below.
*nifi-1:8080* is being added 7 times when it should be added just once, This
shows incorrect *1/8* nodes cluster summary when expected behavior is just 1/2
nodes .
!image-2020-06-19-02-50-27-674.png!
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