Add some more /0 checking

2 files changed, 4 insertions, 1 deletions

diff --git a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/ClusterTimeseries.java b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/ClusterTimeseries.java
index bc0fe528464..5b6ed43b713 100644
--- a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/ClusterTimeseries.java
+++ b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/ClusterTimeseries.java
@@ -85,6 +85,7 @@ public class ClusterTimeseries {
     public double currentQueryFractionOfMax() {
         if (snapshots.isEmpty()) return 0.5;
         var max = snapshots.stream().mapToDouble(ClusterMetricSnapshot::queryRate).max().getAsDouble();
+        if (max == 0) return 1.0;
         return snapshots.get(snapshots.size() - 1).queryRate() / max;
     }
 
diff --git a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/ResourceTarget.java b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/ResourceTarget.java
index c7151e3ae7b..d2bfecfcdae 100644
--- a/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/ResourceTarget.java
+++ b/node-repository/src/main/java/com/yahoo/vespa/hosted/provision/autoscale/ResourceTarget.java
@@ -79,7 +79,9 @@ public class ResourceTarget {
         Duration scalingDuration = clusterNodesTimeseries.cluster().scalingDuration(clusterNodesTimeseries.clusterNodes().clusterSpec());
         double growthRateHeadroom = 1 + maxGrowthRate * scalingDuration.toMinutes();
         // Cap headroom at 10% above the historical observed peak
-        growthRateHeadroom = Math.min(growthRateHeadroom, 1 / clusterTimeseries.currentQueryFractionOfMax() + 0.1);
+        double fractionOfMax = clusterTimeseries.currentQueryFractionOfMax();
+        if (fractionOfMax != 0)
+            growthRateHeadroom = Math.min(growthRateHeadroom, 1 / fractionOfMax + 0.1);
 
         // How much headroom is needed to handle sudden arrival of additional traffic due to another zone going down?
         double trafficShiftHeadroom;