cadonna commented on code in PR #12795: URL: https://github.com/apache/kafka/pull/12795#discussion_r1010735950
########## streams/src/main/java/org/apache/kafka/streams/processor/internals/TaskManager.java: ########## @@ -395,8 +395,10 @@ private void createNewTasks(final Map<TaskId, Set<TopicPartition>> activeTasksTo tasks.addActiveTasks(newActiveTasks); tasks.addStandbyTasks(newStandbyTask); } else { - tasks.addPendingTaskToInit(newActiveTasks); - tasks.addPendingTaskToInit(newStandbyTask); + final Map<TaskId, RuntimeException> taskInitExceptions = new LinkedHashMap<>(); + Stream.concat(newActiveTasks.stream(), newStandbyTask.stream()) + .forEach(t -> addTaskToStateUpdater(t, taskInitExceptions)); Review Comment: When I started working on the state updater I had the same thought, but then I learned that task initialization might take some time due to the need of opening RocksDB instances. Having such time consuming operations on the rebalance path is not ideal. I do not remember exactly the reason, but I think with cooperative rebalancing the client might miss the immediate next rebalance which would lead again to more rebalances. @ableegoldman Please keep me honest here. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: jira-unsubscr...@kafka.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org