diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/context/MetadataContext.java b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/context/MetadataContext.java
index 61f28ffe8..8b9ee06f7 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/context/MetadataContext.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/context/MetadataContext.java
@@ -17,6 +17,8 @@
 
 package com.tencent.cloud.metadata.context;
 
+import com.tencent.cloud.metadata.util.JacksonUtils;
+
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.Map;
@@ -74,4 +76,12 @@ public class MetadataContext {
     public void putAllSystemMetadata(Map<String, String> systemMetadata) {
         this.systemMetadata.putAll(systemMetadata);
     }
+
+    @Override
+    public String toString() {
+        return "MetadataContext{" +
+                "transitiveCustomMetadata=" + JacksonUtils.serialize2Json(transitiveCustomMetadata) +
+                ", systemMetadata=" + JacksonUtils.serialize2Json(systemMetadata) +
+                '}';
+    }
 }
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/filter/MetadataReactiveFilter.java b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/filter/MetadataReactiveFilter.java
index 12b9f6f6c..9c4004eff 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/filter/MetadataReactiveFilter.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/filter/MetadataReactiveFilter.java
@@ -70,25 +70,21 @@ public class MetadataReactiveFilter implements WebFilter, Ordered {
         LOG.debug("Get upstream metadata string: {}", customMetadataStr);
 
         // create custom metadata.
-        Map<String, String> upstreamCustomMetadataMap = JacksonUtils.deserializeMetadataMap(customMetadataStr);
+        Map<String, String> upstreamCustomMetadataMap = JacksonUtils.deserialize2Map(customMetadataStr);
 
         // create system metadata.
         Map<String, String> systemMetadataMap = new HashMap<>();
         systemMetadataMap.put(LOCAL_NAMESPACE, MetadataContextHolder.LOCAL_NAMESPACE);
         systemMetadataMap.put(LOCAL_SERVICE, MetadataContextHolder.LOCAL_SERVICE);
-        systemMetadataMap.put(LOCAL_PATH, serverHttpRequest.getURI().getRawPath());
+        systemMetadataMap.put(LOCAL_PATH, serverHttpRequest.getURI().getPath());
 
-        try {
-            MetadataContextHolder.init(upstreamCustomMetadataMap, systemMetadataMap);
+        MetadataContextHolder.init(upstreamCustomMetadataMap, systemMetadataMap);
 
-            // Save to ServerWebExchange.
-            serverWebExchange.getAttributes()
-                    .put(MetadataConstant.HeaderName.METADATA_CONTEXT, MetadataContextHolder.get());
-            return webFilterChain.filter(serverWebExchange).doFinally((type) -> MetadataContextHolder.remove());
-        } catch (RuntimeException e) {
-            throw e;
-        } finally {
-            MetadataContextHolder.remove();
-        }
+        // Save to ServerWebExchange.
+        serverWebExchange.getAttributes()
+                .put(MetadataConstant.HeaderName.METADATA_CONTEXT, MetadataContextHolder.get());
+        return webFilterChain.filter(serverWebExchange)
+                .doOnError(throwable -> LOG.error("handle metadata[{}] error.", MetadataContextHolder.get()))
+                .doFinally((type) -> MetadataContextHolder.remove());
     }
-}
+}
\ No newline at end of file
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/filter/MetadataServletFilter.java b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/filter/MetadataServletFilter.java
index a478bb17e..ff4e57b65 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/filter/MetadataServletFilter.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/filter/MetadataServletFilter.java
@@ -64,7 +64,7 @@ public class MetadataServletFilter extends OncePerRequestFilter {
         LOG.debug("Get upstream metadata string: {}", customMetadataStr);
 
         // create custom metadata.
-        Map<String, String> upstreamCustomMetadataMap = JacksonUtils.deserializeMetadataMap(customMetadataStr);
+        Map<String, String> upstreamCustomMetadataMap = JacksonUtils.deserialize2Map(customMetadataStr);
 
         // create system metadata.
         Map<String, String> systemMetadataMap = new HashMap<>();
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/interceptor/feign/Metadata2HeaderFeignInterceptor.java b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/interceptor/feign/Metadata2HeaderFeignInterceptor.java
index 0c6f0d2d7..11c33ed0e 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/interceptor/feign/Metadata2HeaderFeignInterceptor.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/interceptor/feign/Metadata2HeaderFeignInterceptor.java
@@ -57,7 +57,7 @@ public class Metadata2HeaderFeignInterceptor implements RequestInterceptor, Orde
         if (!CollectionUtils.isEmpty(requestTemplate.headers())
                 && !CollectionUtils.isEmpty(requestTemplate.headers().get(CUSTOM_METADATA))) {
             for (String headerMetadataStr : requestTemplate.headers().get(CUSTOM_METADATA)) {
-                Map<String, String> headerMetadataMap = JacksonUtils.deserializeMetadataMap(headerMetadataStr);
+                Map<String, String> headerMetadataMap = JacksonUtils.deserialize2Map(headerMetadataStr);
                 for (String key : headerMetadataMap.keySet()) {
                     metadataContext.putTransitiveCustomMetadata(key, headerMetadataMap.get(key));
                 }
@@ -66,7 +66,7 @@ public class Metadata2HeaderFeignInterceptor implements RequestInterceptor, Orde
 
         Map<String, String> customMetadata = metadataContext.getAllTransitiveCustomMetadata();
         if (!CollectionUtils.isEmpty(customMetadata)) {
-            String metadataStr = JacksonUtils.serializeToJson(customMetadata);
+            String metadataStr = JacksonUtils.serialize2Json(customMetadata);
             requestTemplate.removeHeader(CUSTOM_METADATA);
             try {
                 requestTemplate.header(CUSTOM_METADATA,
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/interceptor/resttemplate/MetadataRestTemplateInterceptor.java b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/interceptor/resttemplate/MetadataRestTemplateInterceptor.java
index 025db7784..090f572ac 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/interceptor/resttemplate/MetadataRestTemplateInterceptor.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/core/interceptor/resttemplate/MetadataRestTemplateInterceptor.java
@@ -59,14 +59,14 @@ public class MetadataRestTemplateInterceptor implements ClientHttpRequestInterce
         // add new metadata and cover old
         String metadataStr = httpRequest.getHeaders().getFirst(MetadataConstant.HeaderName.CUSTOM_METADATA);
         if (!StringUtils.isEmpty(metadataStr)) {
-            Map<String, String> headerMetadataMap = JacksonUtils.deserializeMetadataMap(metadataStr);
+            Map<String, String> headerMetadataMap = JacksonUtils.deserialize2Map(metadataStr);
             for (String key : headerMetadataMap.keySet()) {
                 metadataContext.putTransitiveCustomMetadata(key, headerMetadataMap.get(key));
             }
         }
         Map<String, String> customMetadata = metadataContext.getAllTransitiveCustomMetadata();
         if (!CollectionUtils.isEmpty(customMetadata)) {
-            metadataStr = JacksonUtils.serializeToJson(customMetadata);
+            metadataStr = JacksonUtils.serialize2Json(customMetadata);
             try {
                 httpRequest.getHeaders().set(MetadataConstant.HeaderName.CUSTOM_METADATA,
                         URLEncoder.encode(metadataStr, "UTF-8"));
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/util/JacksonUtils.java b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/util/JacksonUtils.java
index 14cfe468c..a5b9d156b 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/util/JacksonUtils.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/util/JacksonUtils.java
@@ -45,7 +45,7 @@ public class JacksonUtils {
      * @param <T> type of object
      * @return Json String
      */
-    public static <T> String serializeToJson(T object) {
+    public static <T> String serialize2Json(T object) {
         try {
             return OM.writeValueAsString(object);
         } catch (JsonProcessingException e) {
@@ -60,7 +60,7 @@ public class JacksonUtils {
      * @param jsonStr Json String
      * @return Map
      */
-    public static Map<String, String> deserializeMetadataMap(String jsonStr) {
+    public static Map<String, String> deserialize2Map(String jsonStr) {
         try {
             if (StringUtils.hasText(jsonStr)) {
                 return OM.readValue(jsonStr, Map.class);
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/util/MetadataUtils.java b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/util/MetadataUtils.java
index f2f85fccb..08372f48f 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/util/MetadataUtils.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/main/java/com/tencent/cloud/metadata/util/MetadataUtils.java
@@ -47,7 +47,7 @@ public class MetadataUtils {
 
         // Transfer string to map.
         if (StringUtils.hasText(newMetadataStr)) {
-            Map<String, String> requestMetadataMap = JacksonUtils.deserializeMetadataMap(newMetadataStr);
+            Map<String, String> requestMetadataMap = JacksonUtils.deserialize2Map(newMetadataStr);
 
             // metadata from upstream cover local metadata for this thread.
             for (String key : requestMetadataMap.keySet()) {
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/test/java/com/tencent/cloud/metadata/core/intercepter/feign/Metadata2HeaderFeignInterceptorTest.java b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/test/java/com/tencent/cloud/metadata/core/intercepter/feign/Metadata2HeaderFeignInterceptorTest.java
index 7ec940542..ad32c4dc6 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/test/java/com/tencent/cloud/metadata/core/intercepter/feign/Metadata2HeaderFeignInterceptorTest.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/test/java/com/tencent/cloud/metadata/core/intercepter/feign/Metadata2HeaderFeignInterceptorTest.java
@@ -80,7 +80,7 @@ public class Metadata2HeaderFeignInterceptorTest {
         @RequestMapping("/test")
         public String test(@RequestHeader(MetadataConstant.HeaderName.CUSTOM_METADATA) String customMetadataStr)
                 throws UnsupportedEncodingException {
-            String systemMetadataStr = JacksonUtils.serializeToJson(MetadataContextHolder.get().getAllSystemMetadata());
+            String systemMetadataStr = JacksonUtils.serialize2Json(MetadataContextHolder.get().getAllSystemMetadata());
             return URLDecoder.decode(customMetadataStr, "UTF-8") + systemMetadataStr;
         }
 
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/test/java/com/tencent/cloud/metadata/core/intercepter/resttemplate/MetadataRestTemplateInterceptorTest.java b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/test/java/com/tencent/cloud/metadata/core/intercepter/resttemplate/MetadataRestTemplateInterceptorTest.java
index fb2e44544..3fcc704f9 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/test/java/com/tencent/cloud/metadata/core/intercepter/resttemplate/MetadataRestTemplateInterceptorTest.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-metadata/src/test/java/com/tencent/cloud/metadata/core/intercepter/resttemplate/MetadataRestTemplateInterceptorTest.java
@@ -93,7 +93,7 @@ public class MetadataRestTemplateInterceptorTest {
         public String test(@RequestHeader(MetadataConstant.HeaderName.CUSTOM_METADATA) String customMetadataStr)
                 throws UnsupportedEncodingException {
             String systemMetadataStr =
-                    JacksonUtils.serializeToJson(MetadataContextHolder.get().getAllSystemMetadata());
+                    JacksonUtils.serialize2Json(MetadataContextHolder.get().getAllSystemMetadata());
             return URLDecoder.decode(customMetadataStr, "UTF-8") + systemMetadataStr;
         }
 
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/config/PolarisGatewayAutoConfiguration.java b/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/config/PolarisGatewayAutoConfiguration.java
index da5be3654..1ecbc478a 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/config/PolarisGatewayAutoConfiguration.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/config/PolarisGatewayAutoConfiguration.java
@@ -20,6 +20,7 @@ package com.tencent.cloud.polaris.gateway.config;
 import com.netflix.zuul.ZuulFilter;
 import com.netflix.zuul.http.ZuulServlet;
 import com.tencent.cloud.polaris.gateway.core.scg.filter.Metadata2HeaderScgFilter;
+import com.tencent.cloud.polaris.gateway.core.scg.filter.MetadataFirstScgFilter;
 import com.tencent.cloud.polaris.gateway.core.zuul.filter.Metadata2HeaderZuulFilter;
 import com.tencent.cloud.polaris.gateway.core.zuul.filter.MetadataFirstZuulFilter;
 import com.tencent.cloud.polaris.gateway.core.zuul.filter.RateLimitZuulFilter;
@@ -57,6 +58,11 @@ public class PolarisGatewayAutoConfiguration {
     @Configuration(proxyBeanMethods = false)
     @ConditionalOnClass(GlobalFilter.class)
     static class PolarisGatewayScgAutoConfiguration {
+        @Bean
+        public GlobalFilter metadataFirstScgFilter() {
+            return new MetadataFirstScgFilter();
+        }
+
         @Bean
         public GlobalFilter metadata2HeaderScgFilter() {
             return new Metadata2HeaderScgFilter();
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/scg/filter/Metadata2HeaderScgFilter.java b/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/scg/filter/Metadata2HeaderScgFilter.java
index 679fa5173..654c1f18e 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/scg/filter/Metadata2HeaderScgFilter.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/scg/filter/Metadata2HeaderScgFilter.java
@@ -64,7 +64,7 @@ public class Metadata2HeaderScgFilter extends AbstractGlobalFilter {
         }
         Map<String, String> customMetadata = metadataContext.getAllTransitiveCustomMetadata();
         if (!CollectionUtils.isEmpty(customMetadata)) {
-            String metadataStr = JacksonUtils.serializeToJson(customMetadata);
+            String metadataStr = JacksonUtils.serialize2Json(customMetadata);
             try {
                 builder.header(MetadataConstant.HeaderName.CUSTOM_METADATA, URLEncoder.encode(metadataStr, "UTF-8"));
             } catch (UnsupportedEncodingException e) {
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/scg/filter/MetadataFirstScgFilter.java b/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/scg/filter/MetadataFirstScgFilter.java
new file mode 100644
index 000000000..8e061abe0
--- /dev/null
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/scg/filter/MetadataFirstScgFilter.java
@@ -0,0 +1,66 @@
+/*
+ * Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
+ *
+ * Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
+ *
+ * Licensed under the BSD 3-Clause License (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * https://opensource.org/licenses/BSD-3-Clause
+ *
+ * Unless required by applicable law or agreed to in writing, software distributed
+ * under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+ * CONDITIONS OF ANY KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations under the License.
+ *
+ */
+
+package com.tencent.cloud.polaris.gateway.core.scg.filter;
+
+import com.tencent.cloud.metadata.constant.MetadataConstant;
+import com.tencent.cloud.metadata.context.MetadataContext;
+import com.tencent.cloud.metadata.context.MetadataContextHolder;
+import org.springframework.cloud.gateway.filter.GatewayFilterChain;
+import org.springframework.cloud.gateway.route.Route;
+import org.springframework.web.server.ServerWebExchange;
+import reactor.core.publisher.Mono;
+
+import static org.springframework.cloud.gateway.filter.RouteToRequestUrlFilter.ROUTE_TO_URL_FILTER_ORDER;
+import static org.springframework.cloud.gateway.support.ServerWebExchangeUtils.GATEWAY_ROUTE_ATTR;
+
+/**
+ * @author Haotian Zhang
+ */
+public class MetadataFirstScgFilter extends AbstractGlobalFilter {
+
+    @Override
+    public int getOrder() {
+        return ROUTE_TO_URL_FILTER_ORDER + 1;
+    }
+
+    @Override
+    public boolean shouldFilter(ServerWebExchange exchange, GatewayFilterChain chain) {
+        return true;
+    }
+
+    @Override
+    public Mono<Void> doFilter(ServerWebExchange exchange, GatewayFilterChain chain) {
+        // get request context
+        Route route = exchange.getAttribute(GATEWAY_ROUTE_ATTR);
+
+        // get metadata of current thread
+        MetadataContext metadataContext = exchange.getAttribute(MetadataConstant.HeaderName.METADATA_CONTEXT);
+
+        // TODO 对端命名空间暂时与本地命名空间相同
+        metadataContext.putSystemMetadata(MetadataConstant.SystemMetadataKey.PEER_NAMESPACE,
+                MetadataContextHolder.get().getSystemMetadata(MetadataConstant.SystemMetadataKey.LOCAL_NAMESPACE));
+        metadataContext.putSystemMetadata(MetadataConstant.SystemMetadataKey.PEER_SERVICE, route.getId());
+        metadataContext.putSystemMetadata(MetadataConstant.SystemMetadataKey.PEER_PATH,
+                exchange.getRequest().getURI().getPath());
+
+        exchange.getAttributes().put(MetadataConstant.HeaderName.METADATA_CONTEXT, metadataContext);
+
+        return chain.filter(exchange);
+    }
+}
diff --git a/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/zuul/filter/Metadata2HeaderZuulFilter.java b/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/zuul/filter/Metadata2HeaderZuulFilter.java
index 53972c6c5..4b743f070 100644
--- a/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/zuul/filter/Metadata2HeaderZuulFilter.java
+++ b/spring-cloud-tencent-starters/spring-cloud-tencent-polaris-gateway/src/main/java/com/tencent/cloud/polaris/gateway/core/zuul/filter/Metadata2HeaderZuulFilter.java
@@ -66,7 +66,7 @@ public class Metadata2HeaderZuulFilter extends ZuulFilter {
         // add new metadata and cover old
         Map<String, String> customMetadata = metadataContext.getAllTransitiveCustomMetadata();
         if (!CollectionUtils.isEmpty(customMetadata)) {
-            String metadataStr = JacksonUtils.serializeToJson(customMetadata);
+            String metadataStr = JacksonUtils.serialize2Json(customMetadata);
             try {
                 requestContext.addZuulRequestHeader(MetadataConstant.HeaderName.CUSTOM_METADATA,
                         URLEncoder.encode(metadataStr, "UTF-8"));