diff --git a/libpurgeablemem/cpp/include/purgeable_resource_manager.h b/libpurgeablemem/cpp/include/purgeable_resource_manager.h
index e0a69266bb868ca50a6414d7c1a513b84ee259d1..41a3b3574e796e2fc807410bd0ca67d013e29906 100644
--- a/libpurgeablemem/cpp/include/purgeable_resource_manager.h
+++ b/libpurgeablemem/cpp/include/purgeable_resource_manager.h
@@ -95,6 +95,7 @@ private:
     friend class PurgeableMemBase;
 
     mutable std::mutex lruCacheMutex_;
+    mutable std::mutex threadPoolMutex_;
     LruCache lruCache_;
     ThreadPool threadPool_ {THREAD_POOL_NAME};
     bool isThreadPoolStarted_ {false};
diff --git a/libpurgeablemem/cpp/src/purgeable_resource_manager.cpp b/libpurgeablemem/cpp/src/purgeable_resource_manager.cpp
index e5d6ffdeffc4d9ec95f2e55530cfc405f7a4502c..c67ce3057d053d250556b559829180dff219b68f 100644
--- a/libpurgeablemem/cpp/src/purgeable_resource_manager.cpp
+++ b/libpurgeablemem/cpp/src/purgeable_resource_manager.cpp
@@ -310,6 +310,7 @@ int32_t PurgeableResourceManager::GetLruCacheCapacityFromSysPara() const
 
 void PurgeableResourceManager::StartThreadPool()
 {
+    std::lock_guard<std::mutex> lock(threadPoolMutex_);
     if (isThreadPoolStarted_) {
         return;
     }