diff --git a/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/MongoDBCollectionMethodInterceptor.java b/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/MongoDBCollectionMethodInterceptor.java
index 9ac04cd88..f79cabfe9 100644
--- a/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/MongoDBCollectionMethodInterceptor.java
+++ b/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/MongoDBCollectionMethodInterceptor.java
@@ -94,6 +94,7 @@ public class MongoDBCollectionMethodInterceptor implements InstanceMethodsAround
         for (ServerAddress address : servers) {
             peers.append(address.getHost() + ":" + address.getPort() + ";");
         }
+
         objInst.setSkyWalkingDynamicField(peers.subSequence(0, peers.length() - 1).toString());
     }
 
diff --git a/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/define/MongoDBCollectionImplInstrumentation.java b/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/define/MongoDBCollectionImplInstrumentation.java
index b41e5078b..fccdaa6c1 100644
--- a/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/define/MongoDBCollectionImplInstrumentation.java
+++ b/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/define/MongoDBCollectionImplInstrumentation.java
@@ -32,7 +32,7 @@ import static org.skywalking.apm.agent.core.plugin.match.NameMatch.byName;
 
 /**
  * {@link MongoDBCollectionImplInstrumentation} presents that skywalking intercepts {@link
- * com.mongodb.DBCollection#find()}, {@link com.mongodb.DBCollection#mapReduce} by using {@link
+ * com.mongodb.DBCollection#find()}, {@link com.mongodb.DBCollection#createIndex} by using {@link
  * MongoDBCollectionMethodInterceptor}.
  */
 public class MongoDBCollectionImplInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {
diff --git a/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/define/MongoDBCollectionInstrumentation.java b/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/define/MongoDBCollectionInstrumentation.java
index ee1902339..3afcef635 100644
--- a/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/define/MongoDBCollectionInstrumentation.java
+++ b/apm-sniffer/apm-sdk-plugin/mongodb-2.x-plugin/src/main/java/org/skywalking/apm/plugin/mongodb/v2/define/MongoDBCollectionInstrumentation.java
@@ -32,7 +32,7 @@ import static org.skywalking.apm.agent.core.plugin.bytebuddy.ArgumentTypeNameMat
 import static org.skywalking.apm.agent.core.plugin.match.NameMatch.byName;
 
 /**
- * {@link MongoDBCollectionInstrumentation} presents that skywalking intercepts {@link com.mongodb.DBCollection#find()},
+ * {@link MongoDBCollectionInstrumentation} presents that skywalking intercepts {@link com.mongodb.DBCollection#getCount()},
  * {@link com.mongodb.DBCollection#mapReduce} by using {@link MongoDBCollectionMethodInterceptor}.
  */
 public class MongoDBCollectionInstrumentation extends ClassInstanceMethodsEnhancePluginDefine {