lianetm commented on code in PR #18089:
URL: https://github.com/apache/kafka/pull/18089#discussion_r1880508552
##########
clients/src/main/java/org/apache/kafka/clients/consumer/internals/AbstractMembershipManager.java:
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@@ -1175,21 +1175,8 @@ private CompletableFuture<Void> assignPartitions(
// Invoke user call back.
CompletableFuture<Void> result =
signalPartitionsAssigned(addedPartitions);
- result.whenComplete((__, exception) -> {
- if (exception == null) {
- // Enable newly added partitions to start fetching and
updating positions for them.
-
subscriptions.enablePartitionsAwaitingCallback(addedPartitions);
- } else {
- // Keeping newly added partitions as non-fetchable after the
callback failure.
- // They will be retried on the next reconciliation loop, until
it succeeds or the
- // broker removes them from the assignment.
- if (!addedPartitions.isEmpty()) {
- log.warn("Leaving newly assigned partitions {} marked as
non-fetchable and not " +
- "requiring initializing positions after
onPartitionsAssigned callback failed.",
- addedPartitions, exception);
- }
- }
- });
+ // Enable newly added partitions to start fetching and updating
positions for them.
+ result.whenComplete((__, exception) ->
subscriptions.enablePartitionsAwaitingCallback(addedPartitions));
Review Comment:
> I agree that the current behavior appears to be a bug, but addressing it
may require a KIP (or further discussion) to define the new behavior of the
callback in handling exceptions. For now, this PR can focus on fixing the
inconsistent behavior.
Sorry I didn't mean to introduce anything new for recovery, just calling
`enablePartitionsAwaitingCallback` passing assigned partitions instead of
adding partitions. That call will be harmless if the assigned partitions are
already enabled, but it will fix the bug that assigned partitions for which the
callback previously failed remain unfetchable, right? Would that work to fix
the inconsistency? (agree that here we're trying to make the 2 consumer behave
in the same way, nothing more)
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