diff --git a/server/src/main/java/org/opensearch/search/profile/query/ConcurrentQueryProfileBreakdown.java b/server/src/main/java/org/opensearch/search/profile/query/ConcurrentQueryProfileBreakdown.java
index ca8c417b61094..26c6b47b3819b 100644
--- a/server/src/main/java/org/opensearch/search/profile/query/ConcurrentQueryProfileBreakdown.java
+++ b/server/src/main/java/org/opensearch/search/profile/query/ConcurrentQueryProfileBreakdown.java
@@ -84,7 +84,8 @@ public Map<String, Long> toBreakdownMap() {
             // the new rewritten query. The sliceCollectorsToLeaves is empty because this breakdown for rewritten query gets created later
             // in search leaf path which doesn't have collector. Also, this is not needed since this breakdown is per leaf and there is no
             // concurrency involved.
-            assert contexts.size() == 1 : new OpenSearchException(
+            assert contexts.size() == 1 : "Unexpected size: "
+                    + contexts.size() + " of leaves breakdown in ConcurrentQueryProfileBreakdown of rewritten query for a leaf."
                 "Unexpected size: "
                     + contexts.size()
                     + " of leaves breakdown in ConcurrentQueryProfileBreakdown of rewritten query for a leaf."