echauchot commented on code in PR #22985:
URL: https://github.com/apache/flink/pull/22985#discussion_r1360383883


##########
flink-runtime/src/main/java/org/apache/flink/runtime/scheduler/adaptive/Executing.java:
##########
@@ -67,13 +77,36 @@ class Executing extends StateWithExecutionGraph implements 
ResourceListener {
         this.context = context;
         Preconditions.checkState(
                 executionGraph.getState() == JobStatus.RUNNING, "Assuming 
running execution graph");
+        this.scalingIntervalMin = scalingIntervalMin;
+        this.scalingIntervalMax = scalingIntervalMax;
+        this.lastRescale =
+                Instant.now(); // Executing is recreated with each restart 
(when we rescale)
+        // we consider the first execution of the pipeline as a rescale event
+        Preconditions.checkState(
+                !scalingIntervalMin.isNegative(),
+                "%s must be positive integer or 0",
+                JobManagerOptions.SCHEDULER_SCALING_INTERVAL_MIN.key());
+        if (scalingIntervalMax != null) {
+            Preconditions.checkState(
+                    scalingIntervalMax.compareTo(scalingIntervalMin) > 0,
+                    "%s(%d) must be greater than %s(%d)",
+                    JobManagerOptions.SCHEDULER_SCALING_INTERVAL_MAX.key(),
+                    scalingIntervalMax,
+                    JobManagerOptions.SCHEDULER_SCALING_INTERVAL_MIN.key(),
+                    scalingIntervalMin);
+        }
 
         deploy();
 
         // check if new resources have come available in the meantime
         context.runIfState(this, this::maybeRescale, Duration.ZERO);
     }
 
+    @VisibleForTesting
+    void setLastRescale(Instant lastRescale) {

Review Comment:
   Yes I know this and I agree but the big difference to me is that this field 
is a **constant** in the production code. But fair enough, I'll do the change 
if you want to.



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