diff --git a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigAutoConfiguration.java b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigAutoConfiguration.java
index 05acc40f..4ff6ce17 100644
--- a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigAutoConfiguration.java
+++ b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigAutoConfiguration.java
@@ -63,14 +63,9 @@ public class NacosConfigAutoConfiguration {
 	@Bean
 	public NacosContextRefresher nacosContextRefresher(
 			NacosConfigManager nacosConfigManager,
-			NacosRefreshProperties nacosRefreshProperties,
 			NacosRefreshHistory nacosRefreshHistory) {
-		// Compatible with older configurations
-		if (nacosConfigManager.getNacosConfigProperties().isRefreshEnabled()
-				&& null != nacosRefreshProperties
-				&& !nacosRefreshProperties.isEnabled()) {
-			nacosConfigManager.getNacosConfigProperties().setRefreshEnabled(false);
-		}
+		// Consider that it is not necessary to be compatible with the previous configuration
+		// and use the new configuration if necessary.
 		return new NacosContextRefresher(nacosConfigManager, nacosRefreshHistory);
 	}
 
diff --git a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigManager.java b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigManager.java
index 510dabf4..e27b3e06 100644
--- a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigManager.java
+++ b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosConfigManager.java
@@ -51,8 +51,10 @@ public class NacosConfigManager {
 		if (Objects.isNull(service)) {
 			synchronized (NacosConfigManager.class) {
 				try {
-					service = NacosFactory.createConfigService(
-							nacosConfigProperties.assembleConfigServiceProperties());
+					if (Objects.isNull(service)) {
+						service = NacosFactory.createConfigService(
+								nacosConfigProperties.assembleConfigServiceProperties());
+					}
 				}
 				catch (NacosException e) {
 					log.error(e.getMessage());
diff --git a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosPropertySourceRepository.java b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosPropertySourceRepository.java
index 718515ff..ac391bad 100644
--- a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosPropertySourceRepository.java
+++ b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/NacosPropertySourceRepository.java
@@ -76,7 +76,8 @@ public final class NacosPropertySourceRepository {
 	}
 
 	public static String getMapKey(String dataId, String group) {
-		return String.format("%s$%s", String.valueOf(dataId), String.valueOf(group));
+		return String.join(NacosConfigProperties.COMMAS, String.valueOf(dataId),
+				String.valueOf(group));
 	}
 
 }
diff --git a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/client/NacosPropertySource.java b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/client/NacosPropertySource.java
index 997fd378..2d83fa5d 100644
--- a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/client/NacosPropertySource.java
+++ b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/client/NacosPropertySource.java
@@ -19,6 +19,8 @@ package com.alibaba.cloud.nacos.client;
 import java.util.Date;
 import java.util.Map;
 
+import com.alibaba.cloud.nacos.NacosConfigProperties;
+
 import org.springframework.core.env.MapPropertySource;
 
 /**
@@ -49,7 +51,7 @@ public class NacosPropertySource extends MapPropertySource {
 
 	NacosPropertySource(String group, String dataId, Map<String, Object> source,
 			Date timestamp, boolean isRefreshable) {
-		super(String.format("%s#%s", dataId, group), source);
+		super(String.join(NacosConfigProperties.COMMAS, dataId, group), source);
 		this.group = group;
 		this.dataId = dataId;
 		this.timestamp = timestamp;
diff --git a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/refresh/NacosRefreshHistory.java b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/refresh/NacosRefreshHistory.java
index bf8cc0d6..7fcd4be0 100644
--- a/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/refresh/NacosRefreshHistory.java
+++ b/spring-cloud-alibaba-nacos-config/src/main/java/com/alibaba/cloud/nacos/refresh/NacosRefreshHistory.java
@@ -26,10 +26,15 @@ import java.util.Date;
 import java.util.LinkedList;
 import java.util.Map;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import org.springframework.util.StringUtils;
 
 public class NacosRefreshHistory {
 
+	private final static Logger log = LoggerFactory.getLogger(NacosRefreshHistory.class);
+
 	private static final int MAX_SIZE = 20;
 
 	private final LinkedList<Record> records = new LinkedList<>();
@@ -43,7 +48,8 @@ public class NacosRefreshHistory {
 		try {
 			md = MessageDigest.getInstance("MD5");
 		}
-		catch (NoSuchAlgorithmException ignored) {
+		catch (NoSuchAlgorithmException e) {
+			log.error("failed to initialize MessageDigest : ", e);
 		}
 	}
 
diff --git a/spring-cloud-alibaba-nacos-config/src/main/resources/META-INF/additional-spring-configuration-metadata.json b/spring-cloud-alibaba-nacos-config/src/main/resources/META-INF/additional-spring-configuration-metadata.json
index f5c0ba19..2856a506 100644
--- a/spring-cloud-alibaba-nacos-config/src/main/resources/META-INF/additional-spring-configuration-metadata.json
+++ b/spring-cloud-alibaba-nacos-config/src/main/resources/META-INF/additional-spring-configuration-metadata.json
@@ -3,6 +3,7 @@
     {
       "name": "spring.cloud.nacos.server-addr",
       "type": "java.lang.String",
+      "defaultValue": "localhost:8848",
       "description": "nacos server address."
     },
     {