diff --git a/arex-web-core/src/main/java/com/arextest/web/core/business/config/replay/ComparisonSummaryService.java b/arex-web-core/src/main/java/com/arextest/web/core/business/config/replay/ComparisonSummaryService.java
index 65e4540d..91204c81 100644
--- a/arex-web-core/src/main/java/com/arextest/web/core/business/config/replay/ComparisonSummaryService.java
+++ b/arex-web-core/src/main/java/com/arextest/web/core/business/config/replay/ComparisonSummaryService.java
@@ -165,8 +165,8 @@ public QueryConfigOfCategoryResponseType queryConfigOfCategory(
     }
 
     // set ignore node set
-    Set<String> ignoreNodeSet = configLoadService.getIgnoreNodeSet(null);
-    responseType.setIgnoreNodeSet(ignoreNodeSet);
+    Set<String> ignoreNodeSet = configLoadService.getIgnoreNodeSet("");
+    responseType.setIgnoreNodeSet(ignoreNodeSet == null ? Collections.emptySet() : ignoreNodeSet);
 
     if (operationId == null && entryPoint) {
       return responseType;