diff --git a/src/Service/KeeperServer.cpp b/src/Service/KeeperServer.cpp
index e8013fd75e..31b62db874 100644
--- a/src/Service/KeeperServer.cpp
+++ b/src/Service/KeeperServer.cpp
@@ -328,7 +328,7 @@ bool KeeperServer::isLeader() const
 
 bool KeeperServer::isObserver() const
 {
-    auto cluster_config = state_manager->get_cluster_config();
+    auto cluster_config = state_manager->getClusterConfig();
     return cluster_config->get_server(server_id)->is_learner();
 }
 
diff --git a/src/Service/NuRaftStateManager.cpp b/src/Service/NuRaftStateManager.cpp
index 79e8e81099..23f3d6a9b1 100644
--- a/src/Service/NuRaftStateManager.cpp
+++ b/src/Service/NuRaftStateManager.cpp
@@ -24,18 +24,17 @@ NuRaftStateManager::NuRaftStateManager(int id_, const Poco::Util::AbstractConfig
     cur_cluster_config = parseClusterConfig(config_, "keeper.cluster");
 }
 
-ptr<cluster_config> NuRaftStateManager::get_cluster_config() const
+ptr<cluster_config> NuRaftStateManager::getClusterConfig() const
 {
-    std::lock_guard<std::mutex> l(cluster_config_lock_);
+    std::lock_guard<std::mutex> lock(cluster_config_mutex);
     ptr<cluster_config> ret = cur_cluster_config;
     return ret;
 }
 
-void NuRaftStateManager::set_cluster_config(const ptr<cluster_config>& new_config)
+void NuRaftStateManager::setClusterConfig(const ptr<cluster_config>& new_config)
 {
-    std::lock_guard<std::mutex> l(cluster_config_lock_);
+    std::lock_guard<std::mutex> lock(cluster_config_mutex);
     cur_cluster_config = new_config;
-    LOG_INFO(log, "set config with log index {}", cur_cluster_config->get_log_idx());
 }
 
 ptr<cluster_config> NuRaftStateManager::load_config()
@@ -43,7 +42,7 @@ ptr<cluster_config> NuRaftStateManager::load_config()
     if (!Poco::File(cluster_config_file).exists())
     {
         LOG_INFO(log, "load config with initial cluster config.");
-        return get_cluster_config();
+        return getClusterConfig();
     }
 
     std::unique_ptr<ReadBufferFromFile> read_file_buf = std::make_unique<ReadBufferFromFile>(cluster_config_file, 4096);
@@ -52,7 +51,8 @@ ptr<cluster_config> NuRaftStateManager::load_config()
     ptr<nuraft::buffer> buf = nuraft::buffer::alloc(size);
     read_file_buf->readStrict(reinterpret_cast<char *>(buf->data()), size);
     auto new_cluster_config = nuraft::cluster_config::deserialize(*buf);
-    set_cluster_config(new_cluster_config);
+    setClusterConfig(new_cluster_config);
+    LOG_INFO(log, "load config with log index {}", new_cluster_config->get_log_idx());
     return new_cluster_config;
 }
 
@@ -65,7 +65,9 @@ void NuRaftStateManager::save_config(const cluster_config & config)
     out_file_buf->write(reinterpret_cast<char *>(data->data()), data->size());
     out_file_buf->finalize();
     out_file_buf->sync();
-    set_cluster_config(cluster_config::deserialize(*data));
+    auto new_cluster_config = cluster_config::deserialize(*data);
+    setClusterConfig(new_cluster_config);
+    LOG_INFO(log, "save config with log index {}", new_cluster_config->get_log_idx());
 }
 
 void NuRaftStateManager::save_state(const srv_state & state)
@@ -157,7 +159,7 @@ ptr<cluster_config> NuRaftStateManager::parseClusterConfig(
 ConfigUpdateActions NuRaftStateManager::getConfigurationDiff(const Poco::Util::AbstractConfiguration & config)
 {
     auto new_cluster_config = parseClusterConfig(config, "keeper.cluster");
-    auto old_cluster_config = get_cluster_config();
+    auto old_cluster_config = getClusterConfig();
 
     std::unordered_map<int, KeeperServerConfigPtr> new_ids, old_ids;
     for (const auto & new_server : new_cluster_config->get_servers())
diff --git a/src/Service/NuRaftStateManager.h b/src/Service/NuRaftStateManager.h
index 7be82db490..e9ae020e8b 100644
--- a/src/Service/NuRaftStateManager.h
+++ b/src/Service/NuRaftStateManager.h
@@ -66,9 +66,9 @@ class NuRaftStateManager : public nuraft::state_mgr
 
     //ptr<srv_config> get_srv_config() const { return curr_srv_config; }
 
-    ptr<cluster_config> get_cluster_config() const;
+    ptr<cluster_config> getClusterConfig() const;
 
-    void set_cluster_config(const ptr<cluster_config>& new_config);
+    void setClusterConfig(const ptr<cluster_config>& new_config);
 
     /// Get configuration diff between proposed XML and current state in RAFT
     ConfigUpdateActions getConfigurationDiff(const Poco::Util::AbstractConfiguration & config);
@@ -93,7 +93,7 @@ class NuRaftStateManager : public nuraft::state_mgr
     /**
      * Lock for cluster config.
      */
-    mutable std::mutex cluster_config_lock_;
+    mutable std::mutex cluster_config_mutex;
 
 
 protected: