Joseph Gresock created NIFI-8466:
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Summary: Offloading the Single Node load balancing target causes
ignored backpressure
Key: NIFI-8466
URL: https://issues.apache.org/jira/browse/NIFI-8466
Project: Apache NiFi
Issue Type: Bug
Affects Versions: 1.13.2
Reporter: Joseph Gresock
Attachments: Single_Node_Queue.xml
In a multi-node cluster, it is possible to get a Single Node load balanced
queue into the following state by offloading the node that receives the load
balanced flow files:
# The load balanced queue ignores backpressure
# The processor following the load balanced queue acts like it has nothing to
process, even when running
Steps to reproduce:
# Add a Single Node load balanced queue on a multi-node cluster (see attached
Template)
# Discover which node receives the flow files in the queue by running only the
first processor, then viewing the Connections tab of the Summary view, and
finally clicking the Cluster button for the load balanced queue. The node that
has all the flow files is the one you will need to Offload in the next step
# Disconnect and then Offload the node that gets the flow files in Single Node
load balancing
# Reconnect the node
# Run both processors surrounding the load balanced queue
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