mjsax commented on code in PR #20833:
URL: https://github.com/apache/kafka/pull/20833#discussion_r2505943575


##########
streams/src/main/java/org/apache/kafka/streams/processor/internals/StreamsPartitionAssignor.java:
##########
@@ -1458,6 +1458,14 @@ protected boolean maybeUpdateSubscriptionVersion(final 
int receivedAssignmentMet
 
     @Override
     public void onAssignment(final Assignment assignment, final 
ConsumerGroupMetadata metadata) {
+        final Set<Task> tasksWithOpenTransactions = taskManager.allOwnedTasks()
+            .values()
+            .stream()
+            .filter(t -> t.commitNeeded())
+            .collect(Collectors.toSet());
+        log.info("Committing {} tasks with open transactions before 
onAssignment()", tasksWithOpenTransactions.size());
+        taskManager.commit(tasksWithOpenTransactions);

Review Comment:
   `taskManger.commit` might throw exception. We need to handle them. 
`onAssignment()` is called from within the `KafkaConsumer` which is not setup 
to handle any of these exceptions.



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