Michael Bingham created KAFKA-9964:
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Summary: Better description of RoundRobinPartitioner behavior for
AK 2.4+
Key: KAFKA-9964
URL: https://issues.apache.org/jira/browse/KAFKA-9964
Project: Kafka
Issue Type: Improvement
Components: producer
Affects Versions: 2.4.1, 2.5.0, 2.4.0
Reporter: Michael Bingham
The Javadocs for {{RoundRobinPartitioner}} currently state:
{quote}This partitioning strategy can be used when user wants to distribute the
writes to all partitions equally
{quote}
In AK 2.4+, equal distribution is not guaranteed, even with this partitioner.
The enhancements to consider batching made withÂ
[https://cwiki.apache.org/confluence/display/KAFKA/KIP-480%3A+Sticky+Partitioner]
affect this partitioner as well.
So it would be useful to add some additional Javadocs to explain that unless
batching is disabled, even distribution of records is not guaranteed.
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