(WIP)KAFKA-9965/KAFKA-13303: RoundRobinPartitioner broken by KIP-480 #20170
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| partitioner.onNewBatch(topicB, testCluster, 1); | ||
| assertEquals(7, partitioner.partition(topicA, null, null, null, null, testCluster)); | ||
| assertEquals(8, partitioner.partition(topicA, null, null, null, null, testCluster)); | ||
| assertEquals(1, partitioner.partition(topicB, null, null, null, null, testCluster)); |
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It's great that this test verifies the next partition selected matches the enqueued value for each topic. Consider adding test cases for some edge cases, like empty queue and error handling
jim0987795064
changed the title
chia7712
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Jul 30, 2025
| @@ -45,4 +45,7 @@ public interface Partitioner extends Configurable, Closeable { | |||
| * This is called when partitioner is closed. | |||
| */ | |||
| void close(); | |||
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| default void onNewBatch(String topic, Cluster cluster, int prevPartition) { | |||
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please consider using "casting" to invoke RoundRobinPartitioner#onNewBatch if needs
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RoundRobinPartitioner behaviour was broken by sticky partitioning (KIP-480).
This patch addresses the behavioural issue caused by the second call to
partition()afteronNewBatch(), in a predicatable and thread-safe manner.Unit tested by simulation of multiple threads producing to two topics with race conditions.
Changes:
Reasons: