AHeise commented on a change in pull request #15294:
URL: https://github.com/apache/flink/pull/15294#discussion_r602718485
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/PendingCheckpoint.java
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@@ -400,32 +400,31 @@ public TaskAcknowledgeResult acknowledgeTask(
int subtaskIndex = vertex.getParallelSubtaskIndex();
long ackTimestamp = System.currentTimeMillis();
- if (operatorSubtaskStates != null) {
- for (OperatorIDPair operatorID : operatorIDs) {
-
- OperatorSubtaskState operatorSubtaskState =
- operatorSubtaskStates.getSubtaskStateByOperatorID(
- operatorID.getGeneratedOperatorID());
-
- // if no real operatorSubtaskState was reported, we insert
an empty state
- if (operatorSubtaskState == null) {
- operatorSubtaskState =
OperatorSubtaskState.builder().build();
- }
-
- OperatorState operatorState =
-
operatorStates.get(operatorID.getGeneratedOperatorID());
-
- if (operatorState == null) {
- operatorState =
- new OperatorState(
- operatorID.getGeneratedOperatorID(),
-
vertex.getTotalNumberOfParallelSubtasks(),
- vertex.getMaxParallelism());
-
operatorStates.put(operatorID.getGeneratedOperatorID(), operatorState);
- }
-
- operatorState.putState(subtaskIndex, operatorSubtaskState);
Review comment:
We can recover from them, but not rescale from UC checkpionts (which is
fair since it's a major release). All this change is doing is to not omit
operators without state in the checkpoint. This omitted state is currently
created during recovery in the initialization step of
`StateAssignmentOperation`.
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