From 062e637a6c274f46018468118c53596b5342efab Mon Sep 17 00:00:00 2001
From: mateczagany <czmate10@gmail.com>
Date: Sun, 6 Jul 2025 06:23:43 +0200
Subject: [PATCH] [FLINK-38051] Fix flaky test JobAutoScalerImplTest

---
 .../org/apache/flink/autoscaler/ScalingMetricEvaluator.java  | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/flink-autoscaler/src/main/java/org/apache/flink/autoscaler/ScalingMetricEvaluator.java b/flink-autoscaler/src/main/java/org/apache/flink/autoscaler/ScalingMetricEvaluator.java
index 58c5dbe4a4..b2a4a277e7 100644
--- a/flink-autoscaler/src/main/java/org/apache/flink/autoscaler/ScalingMetricEvaluator.java
+++ b/flink-autoscaler/src/main/java/org/apache/flink/autoscaler/ScalingMetricEvaluator.java
@@ -456,7 +456,10 @@ public static double getRate(
             return Double.NaN;
         }
 
-        return 1000 * (last - first) / Duration.between(firstTs, lastTs).toMillis();
+        long tsDiff = Duration.between(firstTs, lastTs).toMillis();
+        tsDiff = Math.max(tsDiff, 1);
+
+        return 1000 * (last - first) / tsDiff;
     }
 
     public static double getAverage(