jihoonson commented on a change in pull request #6206: Fix NPE in
KafkaSupervisor.checkpointTaskGroup
URL: https://github.com/apache/incubator-druid/pull/6206#discussion_r212173382
##########
File path:
extensions-core/kafka-indexing-service/src/main/java/io/druid/indexing/kafka/supervisor/KafkaSupervisor.java
##########
@@ -1127,8 +1147,15 @@ public Boolean apply(KafkaIndexTask.Status status)
);
}
);
- taskGroupsToVerify.add(taskGroupId);
- taskGroup.tasks.putIfAbsent(taskId, new
TaskData());
+ taskGroupsToVerify.put(taskGroupId, taskGroup);
+ final TaskData prevTaskGroup =
taskGroup.tasks.putIfAbsent(taskId, new TaskData());
+ if (prevTaskGroup != null) {
+ throw new ISE(
Review comment:
This should never happen and even if it occurs, the supervisor would kill
the task of corresponding `taskId` and respawn the same task. Please check
https://github.com/apache/incubator-druid/pull/6206/files/c46d4681c334709caa5cddbd0ce0c67a7d22eaad#diff-6eee87b3aa4eb3a516965fe6e93e25a4L1138.
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