diff --git a/server/apm/apm-server/apm-receiver/src/main/java/io/holoinsight/server/apm/receiver/trace/SpanHandler.java b/server/apm/apm-server/apm-receiver/src/main/java/io/holoinsight/server/apm/receiver/trace/SpanHandler.java
index 67e25d1e3..7478686a1 100644
--- a/server/apm/apm-server/apm-receiver/src/main/java/io/holoinsight/server/apm/receiver/trace/SpanHandler.java
+++ b/server/apm/apm-server/apm-receiver/src/main/java/io/holoinsight/server/apm/receiver/trace/SpanHandler.java
@@ -180,7 +180,9 @@ public void buildRelation(List<RPCTrafficSourceBuilder> relationBuilders) throws
 
     relationBuilders.forEach(callingIn -> {
       ServiceRelation serviceRelation = callingIn.toServiceRelation();
-      serverRelationList.add(ServiceRelationDO.fromServiceRelation(serviceRelation));
+      if (serviceRelation != null) {
+        serverRelationList.add(ServiceRelationDO.fromServiceRelation(serviceRelation));
+      }
 
       ServiceInstanceRelation serviceInstanceRelation = callingIn.toServiceInstanceRelation();
       if (serviceInstanceRelation != null) {