kfaraz commented on code in PR #16369:
URL: https://github.com/apache/druid/pull/16369#discussion_r1587396601
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indexing-service/src/main/java/org/apache/druid/indexing/overlord/TaskLockbox.java:
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@@ -579,18 +579,20 @@ private TaskLockPosse createOrFindLockPosse(LockRequest
request, Task task, bool
|| revokeAllIncompatibleActiveLocksIfPossible(conflictPosses,
request)) {
posseToUse = createNewTaskLockPosse(request);
} else {
- // During a rolling update, tasks of mixed versions can be run at
the same time. Old tasks would request
- // timeChunkLocks while new tasks would ask segmentLocks. The
below check is to allow for old and new tasks
- // to get locks of different granularities if they have the same
groupId.
- final boolean allDifferentGranularity = conflictPosses
+ // When a rolling upgrade happens or lock types are changed for an
ongoing Streaming ingestion supervisor,
+ // the existing tasks might have or request different lock
granularities or types than the new ones.
+ // To ensure a smooth transition, we must allocate the different
lock types for the new tasks
+ // so that they can coexist and ingest with the required locks.
+ final boolean allConflictsAreForSameTaskGroupAndInterval =
conflictPosses
Review Comment:
```suggestion
final boolean allLocksHaveSameTaskGroupAndInterval =
conflictPosses
```
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