From 08dea8118ba9cef853c49fc07184bac5cf19336c Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E7=81=BC=E5=8D=8E?=
 <43363120+BurningCN@users.noreply.github.com>
Date: Fri, 25 Feb 2022 16:53:35 +0800
Subject: [PATCH] Fix the problem that NPE may appear in
 ReferenceBeanSupport#convertToString method (#9693)

---
 .../apache/dubbo/config/spring/util/DubboAnnotationUtils.java  | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/DubboAnnotationUtils.java b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/DubboAnnotationUtils.java
index baed5e41cf..132990e588 100644
--- a/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/DubboAnnotationUtils.java
+++ b/dubbo-config/dubbo-config-spring/src/main/java/org/apache/dubbo/config/spring/util/DubboAnnotationUtils.java
@@ -27,6 +27,7 @@ import org.springframework.util.Assert;
 
 import java.util.ArrayList;
 import java.util.Arrays;
+import java.util.Collections;
 import java.util.List;
 import java.util.Map;
 import java.util.stream.Collectors;
@@ -154,7 +155,7 @@ public class DubboAnnotationUtils {
      */
     public static Map<String, String> convertParameters(String[] parameters) {
         if (ArrayUtils.isEmpty(parameters)) {
-            return null;
+            return Collections.emptyMap();
         }
 
         List<String> compatibleParameterArray = Arrays.stream(parameters)