Mark Payne created NIFI-7011:
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Summary: FlowFile ordering can become incorrect when swapping data
Key: NIFI-7011
URL: https://issues.apache.org/jira/browse/NIFI-7011
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Reporter: Mark Payne
Assignee: Mark Payne
NiFi provides weak ordering guarantees when using prioritizers in conjunction
with swapped data. When data is swapped out, it is always the lowest priority
data (according to the selected prioritizers) that is swapped out first. When
data is swapped, it is always swapped back in, in the same order.
However, I've come across a problem where data is swapped out. Then, the data
that is not swapped out gets processed, then data waiting to be swapped out
(lowest priority data) is processed, then the swapped data. It should always be
that the lowest priority data, waiting to be swapped out, should be processed
after all data that is already swapped out gets swapped back in.
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