zhuzhurk commented on a change in pull request #16959:
URL: https://github.com/apache/flink/pull/16959#discussion_r695431542
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File path:
flink-runtime/src/main/java/org/apache/flink/runtime/jobmaster/slotpool/DefaultDeclarativeSlotPool.java
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@@ -117,7 +117,7 @@ public void increaseResourceRequirementsBy(ResourceCounter
increment) {
@Override
public void decreaseResourceRequirementsBy(ResourceCounter decrement) {
- if (decrement.isEmpty()) {
+ if (decrement.isEmpty() || totalResourceRequirements.isEmpty()) {
Review comment:
I guess what @zentol means is that if we decrease a non-empty
`ResourceCounter` when the `totalResourceRequirements` is not empty, it is an
unexpected bug and needs to be exposed.
So I think we should add a check here and also fix
`ResourceCounter#updateNewValue()` to throw exception if negative result
happens.
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