diff --git a/dubbo-common/src/main/java/org/apache/dubbo/config/AbstractConfig.java b/dubbo-common/src/main/java/org/apache/dubbo/config/AbstractConfig.java
index 16e1180da5b..db2b583c22c 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/config/AbstractConfig.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/config/AbstractConfig.java
@@ -318,7 +318,13 @@ private static boolean isParametersSetter(Method method) {
                 && method.getReturnType() == void.class);
     }
 
-    private static Map<String, String> convert(Map<String, String> parameters, String prefix) {
+    /**
+     * @param parameters the raw parameters
+     * @param prefix     the prefix
+     * @return the parameters whose raw key will replace "-" to "."
+     * @revised 2.7.8 "private" to be "protected"
+     */
+    protected static Map<String, String> convert(Map<String, String> parameters, String prefix) {
         if (parameters == null || parameters.isEmpty()) {
             return Collections.emptyMap();
         }
diff --git a/dubbo-common/src/main/java/org/apache/dubbo/config/MetadataReportConfig.java b/dubbo-common/src/main/java/org/apache/dubbo/config/MetadataReportConfig.java
index 175288c8f5d..dcd43e21ea5 100644
--- a/dubbo-common/src/main/java/org/apache/dubbo/config/MetadataReportConfig.java
+++ b/dubbo-common/src/main/java/org/apache/dubbo/config/MetadataReportConfig.java
@@ -25,6 +25,7 @@
 
 import static org.apache.dubbo.common.constants.CommonConstants.DUBBO;
 import static org.apache.dubbo.common.constants.CommonConstants.PROPERTIES_CHAR_SEPARATOR;
+import static org.apache.dubbo.common.utils.StringUtils.isEmpty;
 
 /**
  * MetadataReportConfig
@@ -85,20 +86,25 @@ public MetadataReportConfig(String address) {
         setAddress(address);
     }
 
-    public URL toUrl() {
+    public URL toUrl() throws IllegalArgumentException {
         String address = this.getAddress();
-        if (StringUtils.isEmpty(address)) {
-            return null;
+        if (isEmpty(address)) {
+            throw new IllegalArgumentException("The address of metadata report is invalid.");
         }
         Map<String, String> map = new HashMap<String, String>();
+        URL url = URL.valueOf(address);
+        // Issue : https://github.com/apache/dubbo/issues/6491
+        // Append the parameters from address
+        map.putAll(url.getParameters());
+        // Append or overrides the properties as parameters
         appendParameters(map, this);
-        if (!StringUtils.isEmpty(address)) {
-            URL url = URL.valueOf(address);
-            map.put("metadata", url.getProtocol());
-            return new URL("metadata", url.getUsername(), url.getPassword(), url.getHost(),
-                    url.getPort(), url.getPath(), map);
-        }
-        throw new IllegalArgumentException("The address of metadata report is invalid.");
+        // Normalize the parameters
+        map.putAll(convert(map, null));
+        // put the protocol of URL as the "metadata"
+        map.put("metadata", url.getProtocol());
+        return new URL("metadata", url.getUsername(), url.getPassword(), url.getHost(),
+                url.getPort(), url.getPath(), map);
+
     }
 
     @Parameter(excluded = true)
diff --git a/pom.xml b/pom.xml
index d605ae77d78..51b48a07535 100644
--- a/pom.xml
+++ b/pom.xml
@@ -126,7 +126,7 @@
         <arguments />
         <checkstyle.skip>true</checkstyle.skip>
         <rat.skip>true</rat.skip>
-        <revision>2.7.8</revision>
+        <revision>2.7.9-SNAPSHOT</revision>
     </properties>
 
     <modules>