diff --git a/cpp/src/scheduler/ResourceMgr.cpp b/cpp/src/scheduler/ResourceMgr.cpp
index 2abeaae3b34e1e1de96b8d3d1263bc2e240563c9..96e2589382442ba55108bf4526f06e650e452aef 100644
--- a/cpp/src/scheduler/ResourceMgr.cpp
+++ b/cpp/src/scheduler/ResourceMgr.cpp
@@ -60,7 +60,7 @@ ResourceMgr::Connect(const std::string &name1, const std::string &name2, Connect
 
 void
 ResourceMgr::Connect(ResourceWPtr &res1, ResourceWPtr &res2, Connection &connection) {
-    if (auto observe_a = res1.loc   k()) {
+    if (auto observe_a = res1.lock()) {
         if (auto observe_b = res2.lock()) {
             observe_a->AddNeighbour(std::static_pointer_cast<Node>(observe_b), connection);
             observe_b->AddNeighbour(std::static_pointer_cast<Node>(observe_a), connection);
diff --git a/cpp/unittest/metrics/metricbase_test.cpp b/cpp/unittest/metrics/metricbase_test.cpp
index feda6d1bf9aea3ccabe2f07264dcf05fc53681d6..10087b370abd51b5617878420bb2bc01fe66a207 100644
--- a/cpp/unittest/metrics/metricbase_test.cpp
+++ b/cpp/unittest/metrics/metricbase_test.cpp
@@ -22,7 +22,7 @@ TEST(MetricbaseTest, METRICBASE_TEST){
     instance.IndexFileSizeHistogramObserve(1.0);
     instance.BuildIndexDurationSecondsHistogramObserve(1.0);
     instance.CpuCacheUsageGaugeSet(1.0);
-    instance.GpuCacheUsageGaugeSet(1.0);
+    instance.GpuCacheUsageGaugeSet();
     instance.MetaAccessTotalIncrement();
     instance.MetaAccessDurationSecondsHistogramObserve(1.0);
     instance.FaissDiskLoadDurationSecondsHistogramObserve(1.0);
diff --git a/cpp/unittest/metrics/prometheus_test.cpp b/cpp/unittest/metrics/prometheus_test.cpp
index ece3cf9012b0093f1a5f71f9393011a88cfbfddd..912e910f32f1b81d3b52c6de16c58dc2e6d5a833 100644
--- a/cpp/unittest/metrics/prometheus_test.cpp
+++ b/cpp/unittest/metrics/prometheus_test.cpp
@@ -23,7 +23,7 @@ TEST(PrometheusTest, PROMETHEUS_TEST){
     instance.IndexFileSizeHistogramObserve(1.0);
     instance.BuildIndexDurationSecondsHistogramObserve(1.0);
     instance.CpuCacheUsageGaugeSet(1.0);
-    instance.GpuCacheUsageGaugeSet(1.0);
+    instance.GpuCacheUsageGaugeSet();
     instance.MetaAccessTotalIncrement();
     instance.MetaAccessDurationSecondsHistogramObserve(1.0);
     instance.FaissDiskLoadDurationSecondsHistogramObserve(1.0);