Mark Payne created NIFI-8353:
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Summary: When node is offloaded, it may still receive data from
load-balanced connections
Key: NIFI-8353
URL: https://issues.apache.org/jira/browse/NIFI-8353
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Reporter: Mark Payne
Assignee: Mark Payne
Fix For: 1.14.0
Consider a simple flow: GenerateFlowFile (9 FlowFiles per batch, each 10 KB,
scheduled once per second) -> UpdateAttribute.
The connection between the two processors is configured with Round Robin load
balancing.
Start GenerateFlowFile. Wait a few seconds for some data to queue up.
Disconnect Node 2. Immediately offload Node 2. Refresh cluster page to see that
the node is offloaded.
Navigate to Node 2's UI. Sometimes it will show data queued up. This is because
after the node was offloaded, the connection from Node 1 was still transferring
data to Node 2. Node 1 won't start any additional transactions to send data to
Node 2, but it will complete the already-started transactions. So the node can
be offloaded and end up with data queued.
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