guozhangwang commented on code in PR #12600:
URL: https://github.com/apache/kafka/pull/12600#discussion_r965355508
##########
streams/src/main/java/org/apache/kafka/streams/processor/internals/TaskManager.java:
##########
@@ -421,73 +421,120 @@ private void classifyTasksWithoutStateUpdater(final
Map<TaskId, Set<TopicPartiti
}
}
- private void classifyRunningTasks(final Map<TaskId, Set<TopicPartition>>
activeTasksToCreate,
- final Map<TaskId, Set<TopicPartition>>
standbyTasksToCreate,
- final Map<Task, Set<TopicPartition>>
tasksToRecycle,
- final Set<Task> tasksToCloseClean) {
+ private void classifyRunningAndSuspendedTasks(final Map<TaskId,
Set<TopicPartition>> activeTasksToCreate,
+ final Map<TaskId,
Set<TopicPartition>> standbyTasksToCreate,
+ final Map<Task,
Set<TopicPartition>> tasksToRecycle,
+ final Set<Task>
tasksToCloseClean) {
for (final Task task : tasks.allTasks()) {
+ if (!task.isActive()) {
+ throw new IllegalStateException("Standby tasks should only be
managed by the state updater");
+ }
final TaskId taskId = task.id();
if (activeTasksToCreate.containsKey(taskId)) {
- if (task.isActive()) {
- final Set<TopicPartition> topicPartitions =
activeTasksToCreate.get(taskId);
- if (tasks.updateActiveTaskInputPartitions(task,
topicPartitions)) {
- task.updateInputPartitions(topicPartitions,
topologyMetadata.nodeToSourceTopics(task.id()));
- }
- task.resume();
- } else {
- throw new IllegalStateException("Standby tasks should only
be managed by the state updater");
- }
+ handleReAssignedActiveTask(task,
activeTasksToCreate.get(taskId));
activeTasksToCreate.remove(taskId);
} else if (standbyTasksToCreate.containsKey(taskId)) {
- if (!task.isActive()) {
- throw new IllegalStateException("Standby tasks should only
be managed by the state updater");
- } else {
- tasksToRecycle.put(task, standbyTasksToCreate.get(taskId));
- }
+ tasksToRecycle.put(task, standbyTasksToCreate.get(taskId));
standbyTasksToCreate.remove(taskId);
} else {
tasksToCloseClean.add(task);
}
}
}
+ private void handleReAssignedActiveTask(final Task task,
+ final Set<TopicPartition>
inputPartitions) {
+ if (tasks.updateActiveTaskInputPartitions(task, inputPartitions)) {
+ task.updateInputPartitions(inputPartitions,
topologyMetadata.nodeToSourceTopics(task.id()));
+ }
+ task.resume();
Review Comment:
nit: maybe we can distinguish the cases more explicitly, as:
````
if (task.state() == State.RESTORING) {
handleReAssignedRevokedActiveTask(task);
} else if (task.state() == State.SUSPENDED) {
task.resume();
} else if (task.state() == State.RUNNING) {
// do nothing, this is the case that tasks were not revoked
before
} else {
throw new IllegalStateException("other states should not
happen");
}
```
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