zentol commented on a change in pull request #16959:
URL: https://github.com/apache/flink/pull/16959#discussion_r694714135
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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:
The new branch would hide a bug. There should never be a case where we
decrease the resource requirement such that the result is negative. If such a
case exists we should try to fix that instead.
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