Myasuka commented on a change in pull request #11491:
[FLINK-16513][checkpointing] Unaligned checkpoints: checkpoint metadata
URL: https://github.com/apache/flink/pull/11491#discussion_r397379698
##########
File path:
flink-runtime/src/main/java/org/apache/flink/runtime/checkpoint/StateAssignmentOperation.java
##########
@@ -640,4 +639,17 @@ private static void checkStateMappingCompleteness(
return subtaskKeyedStateHandles;
}
+
+ private static <T extends AbstractChannelStateHandle<?>>
OperatorStateRepartitioner<T> nonRescalingPartitioner(String logStateName) {
+ return (previousParallelSubtaskStates, oldParallelism,
newParallelism) -> {
+ Preconditions.checkArgument(
+ oldParallelism == newParallelism ||
+ previousParallelSubtaskStates.stream()
+ .flatMap(s -> s.stream().map(l
-> l.getOffsets()))
+ .allMatch(List::isEmpty),
+ String.format("rescaling not supported for %s
state (old: %d, %d)", logStateName, oldParallelism, newParallelism));
Review comment:
```suggestion
String.format("rescaling not supported for %s
state (old: %d, new: %d)", logStateName, oldParallelism, newParallelism));
```
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