Yan Chen created NIFI-5896:
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Summary: ComsumeAMQP lose/unack messages under certain conditions
Key: NIFI-5896
URL: https://issues.apache.org/jira/browse/NIFI-5896
Project: Apache NiFi
Issue Type: Bug
Affects Versions: 1.8.0
Reporter: Yan Chen
Symptoms: when batch-size is larger than 1 (tested with 10 and 100), the
processor would *occasionally*:
(1). when in auto-ack mode: lose messaged, i.e., messages consumed from server
but without producing flowfiles;
(2). when auto-ack is disabled, messages could get stuck in "unacked" mode.
We also found a work-around with batch-size 1 with auto-ack off; this
work-around seems reliable enough.
Based on above symptoms and the work-around, it appears to be a race-condition
related issue. (for the same reason, I could not provide a test-case to
reliably recreate the symptom.
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