diff --git a/source/common/config/grpc_mux_impl.cc b/source/common/config/grpc_mux_impl.cc
index 4242599901a7..0be661419845 100644
--- a/source/common/config/grpc_mux_impl.cc
+++ b/source/common/config/grpc_mux_impl.cc
@@ -160,7 +160,7 @@ void GrpcMuxImpl::onDiscoveryResponse(
     std::unique_ptr<envoy::service::discovery::v3::DiscoveryResponse>&& message,
     ControlPlaneStats& control_plane_stats) {
   const std::string type_url = message->type_url();
-  ENVOY_LOG(debug, "Received gRPC message for {} at version {}", type_url, message->version_info());
+  ENVOY_LOG(debug, "Received gRPC message for {} at version {}, resp {}", type_url, message->version_info(), message->DebugString());
   if (api_state_.count(type_url) == 0) {
     // TODO(yuval-k): This should never happen. consider dropping the stream as this is a
     // protocol violation
diff --git a/source/common/http/conn_manager_impl.cc b/source/common/http/conn_manager_impl.cc
index b9296d2a7bf8..05c1942e802c 100644
--- a/source/common/http/conn_manager_impl.cc
+++ b/source/common/http/conn_manager_impl.cc
@@ -1293,9 +1293,15 @@ void ConnectionManagerImpl::ActiveStream::refreshCachedRoute(const Router::Route
       // 查找路由，根据配置的 route 规则查找当前请求匹配的规则，会调用到 RouteMatcher::route
       route = snapped_route_config_->route(cb, *request_headers_, filter_manager_.streamInfo(),
                                            stream_id_);
-    ENVOY_STREAM_LOG(debug, "refreshCachedRoute route cluster name {}", *this, 
-      route==nullptr?  "empty":route->routeEntry()->clusterName());                                      
+      if (!route) {
+        ENVOY_STREAM_LOG(debug, "refreshCachedRoute empty route", *this);
+      } else if (route->routeEntry()) {
+        ENVOY_STREAM_LOG(debug, "refreshCachedRoute route cluster name: {}, route name: {}", *this, route->routeEntry()->clusterName(), route->routeEntry()->routeName());
+      } else {
+          ENVOY_STREAM_LOG(debug, "refreshCachedRoute has route, but entry empty", *this);
+      }
     }
+
   }
 
   setRoute(route);
diff --git a/source/extensions/filters/http/local_ratelimit/local_ratelimit.cc b/source/extensions/filters/http/local_ratelimit/local_ratelimit.cc
index b216b15075af..04b009f08e20 100644
--- a/source/extensions/filters/http/local_ratelimit/local_ratelimit.cc
+++ b/source/extensions/filters/http/local_ratelimit/local_ratelimit.cc
@@ -77,6 +77,7 @@ bool FilterConfig::enforced() const {
 }
 
 Http::FilterHeadersStatus Filter::decodeHeaders(Http::RequestHeaderMap& headers, bool) {
+  ENVOY_LOG(debug, "local_ratelimit decodeHeaders");
   const auto* config = getConfig();
 
   if (!config->enabled()) {
@@ -116,6 +117,7 @@ Http::FilterHeadersStatus Filter::decodeHeaders(Http::RequestHeaderMap& headers,
 }
 
 bool Filter::requestAllowed(absl::Span<const RateLimit::LocalDescriptor> request_descriptors) {
+  ENVOY_LOG(debug, "local_ratelimit requestAllowed with request_descriptors");
   const auto* config = getConfig();
   return config->rateLimitPerConnection()
              ? getPerConnectionRateLimiter().requestAllowed(request_descriptors)
diff --git a/source/extensions/filters/http/local_ratelimit/local_ratelimit.h b/source/extensions/filters/http/local_ratelimit/local_ratelimit.h
index 5b485e6b999f..a7d3910446a1 100644
--- a/source/extensions/filters/http/local_ratelimit/local_ratelimit.h
+++ b/source/extensions/filters/http/local_ratelimit/local_ratelimit.h
@@ -127,9 +127,11 @@ using FilterConfigSharedPtr = std::shared_ptr<FilterConfig>;
  * HTTP local rate limit filter. Depending on the route configuration, this filter calls consults
  * with local token bucket before allowing further filter iteration.
  */
-class Filter : public Http::PassThroughFilter {
+class Filter : public Logger::Loggable<Logger::Id::filter>, public Http::PassThroughFilter {
 public:
-  Filter(FilterConfigSharedPtr config) : config_(config) {}
+  Filter(FilterConfigSharedPtr config) : config_(config) {
+    ENVOY_LOG(debug, "construct local_ratelimit filter {}", static_cast<void*>(this));
+  }
 
   // Http::StreamDecoderFilter
   Http::FilterHeadersStatus decodeHeaders(Http::RequestHeaderMap& headers,