hachikuji commented on a change in pull request #8934:
URL: https://github.com/apache/kafka/pull/8934#discussion_r450960971
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File path:
clients/src/main/java/org/apache/kafka/clients/consumer/KafkaConsumer.java
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@@ -1218,17 +1218,20 @@ public void assign(Collection<TopicPartition>
partitions) {
throw new IllegalStateException("Consumer is not subscribed to
any topics or assigned any partitions");
}
- // poll for new data until the timeout expires
do {
client.maybeTriggerWakeup();
if (includeMetadataInTimeout) {
- // try to update assignment metadata BUT do not need to
block on the timer,
- // since even if we are 1) in the middle of a rebalance or
2) have partitions
- // with unknown starting positions we may still want to
return some data
- // as long as there are some partitions fetchable; NOTE we
always use a timer with 0ms
- // to never block on completing the rebalance procedure if
there's any
- updateAssignmentMetadataIfNeeded(time.timer(0L));
+ // try to update assignment metadata BUT do not need to
block on the timer if we still have
Review comment:
Hmm, not sure if I buy that. `trySend` would only return a value less
than 5s if there was a pending request which needed to be send. However, as
soon as it got sent, it would go back to 5s. So I'm not sure if it alone can
account for a tight poll loop.
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