jonmcewen commented on a change in pull request #8690:
URL: https://github.com/apache/kafka/pull/8690#discussion_r741175055
##########
File path:
clients/src/main/java/org/apache/kafka/clients/producer/RoundRobinPartitioner.java
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@@ -65,12 +65,20 @@ public int partition(String topic, Object key, byte[]
keyBytes, Object value, by
}
private int nextValue(String topic) {
- AtomicInteger counter = topicCounterMap.computeIfAbsent(topic, k -> {
- return new AtomicInteger(0);
- });
+ AtomicInteger counter = topicCounterMap.
+ computeIfAbsent(topic, k -> new AtomicInteger(0));
return counter.getAndIncrement();
}
+ @Override
+ public void onNewBatch(String topic, Cluster cluster, int prevPartition) {
+ // After onNewBatch is called, we will call partition() again.
+ // So 'rewind' the counter for this topic.
+ AtomicInteger counter = topicCounterMap.
+ computeIfAbsent(topic, k -> new AtomicInteger(0));
+ counter.getAndDecrement();
Review comment:
I think I saw race conditions under load that caused partitions to be
skipped with solutions like this. Please consider this patch:
https://github.com/apache/kafka/pull/11326/files
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