zhuzhurk commented on a change in pull request #16959:
URL: https://github.com/apache/flink/pull/16959#discussion_r696381040
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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:
Looks to me this is a critical bug. If TM is disconnected with available
slots during job execution, the job may never be able to declare right resource
requirements again.
I wrote a rough test to show this case. You can check the log to see the
resource declaration that after a failover, the job with parallelism=3 will
only declare resources for 2 slots.
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