diff --git a/be/src/util/metrics.cpp b/be/src/util/metrics.cpp
index 1e92a360a4d919..b09e1989509043 100644
--- a/be/src/util/metrics.cpp
+++ b/be/src/util/metrics.cpp
@@ -271,7 +271,9 @@ void MetricEntity::trigger_hook_unlocked(bool force) const {
     }
 }
 
-MetricRegistry::~MetricRegistry() {}
+MetricRegistry::~MetricRegistry() {
+    LOG_INFO("MetricRegistry is destroyed.");
+}
 
 std::shared_ptr<MetricEntity> MetricRegistry::register_entity(const std::string& name,
                                                               const Labels& labels,
@@ -323,12 +325,12 @@ void MetricRegistry::trigger_all_hooks(bool force) const {
 std::string MetricRegistry::to_prometheus(bool with_tablet_metrics) const {
     // Reorder by MetricPrototype
     EntityMetricsByType entity_metrics_by_types;
-    std::lock_guard<std::mutex> l(_lock);
+    std::lock_guard<std::mutex> l1(_lock);
     for (const auto& entity : _entities) {
         if (entity.first->_type == MetricEntityType::kTablet && !with_tablet_metrics) {
             continue;
         }
-        std::lock_guard<std::mutex> l(entity.first->_lock);
+        std::lock_guard<std::mutex> l2(entity.first->_lock);
         entity.first->trigger_hook_unlocked(false);
         for (const auto& metric : entity.first->_metrics) {
             std::pair<MetricEntity*, Metric*> new_elem =
diff --git a/be/src/util/threadpool.cpp b/be/src/util/threadpool.cpp
index 0025963ad2dede..b34f1b1c5c28aa 100644
--- a/be/src/util/threadpool.cpp
+++ b/be/src/util/threadpool.cpp
@@ -272,7 +272,6 @@ ThreadPool::~ThreadPool() {
     // There should only be one live token: the one used in tokenless submission.
     CHECK_EQ(1, _tokens.size()) << strings::Substitute(
             "Threadpool $0 destroyed with $1 allocated tokens", _name, _tokens.size());
-    shutdown();
 }
 
 Status ThreadPool::init() {