diff --git a/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/CacheGroupMetricsImpl.java b/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/CacheGroupMetricsImpl.java
index 46bdae17e8a7c..d5157063bff20 100644
--- a/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/CacheGroupMetricsImpl.java
+++ b/modules/core/src/main/java/org/apache/ignite/internal/processors/cache/CacheGroupMetricsImpl.java
@@ -314,6 +314,9 @@ private int nodePartitionsCountByState(UUID nodeId, GridDhtPartitionState state)
     private int clusterPartitionsCountByState(GridDhtPartitionState state) {
         GridDhtPartitionFullMap partFullMap = ctx.topology().partitionMap(true);
 
+        if (partFullMap == null)
+            return 0;
+
         int cnt = 0;
 
         for (UUID nodeId : partFullMap.keySet())