diff --git a/src/ray/object_manager/plasma/store_runner.cc b/src/ray/object_manager/plasma/store_runner.cc
index a617e04dc..90497f345 100644
--- a/src/ray/object_manager/plasma/store_runner.cc
+++ b/src/ray/object_manager/plasma/store_runner.cc
@@ -96,26 +96,27 @@ void PlasmaStoreRunner::Start() {
   }
   RAY_LOG(DEBUG) << "starting server listening on " << socket_name_;
 
-  store_.reset(new PlasmaStore(main_service_, plasma_directory_, hugepages_enabled_,
-                               socket_name_, external_store));
-  plasma_config = store_->GetPlasmaStoreInfo();
+  {
+    absl::MutexLock lock(&store_runner_mutex_);
+    store_.reset(new PlasmaStore(main_service_, plasma_directory_, hugepages_enabled_,
+                                socket_name_, external_store));
+    plasma_config = store_->GetPlasmaStoreInfo();
 
-  // We are using a single memory-mapped file by mallocing and freeing a single
-  // large amount of space up front. According to the documentation,
-  // dlmalloc might need up to 128*sizeof(size_t) bytes for internal
-  // bookkeeping.
-  void* pointer = PlasmaAllocator::Memalign(
-      kBlockSize, PlasmaAllocator::GetFootprintLimit() - 256 * sizeof(size_t));
-  RAY_CHECK(pointer != nullptr);
-  // This will unmap the file, but the next one created will be as large
-  // as this one (this is an implementation detail of dlmalloc).
-  PlasmaAllocator::Free(
-      pointer, PlasmaAllocator::GetFootprintLimit() - 256 * sizeof(size_t));
-
-  store_->Start();
+    // We are using a single memory-mapped file by mallocing and freeing a single
+    // large amount of space up front. According to the documentation,
+    // dlmalloc might need up to 128*sizeof(size_t) bytes for internal
+    // bookkeeping.
+    void* pointer = PlasmaAllocator::Memalign(
+        kBlockSize, PlasmaAllocator::GetFootprintLimit() - 256 * sizeof(size_t));
+    RAY_CHECK(pointer != nullptr);
+    // This will unmap the file, but the next one created will be as large
+    // as this one (this is an implementation detail of dlmalloc).
+    PlasmaAllocator::Free(
+        pointer, PlasmaAllocator::GetFootprintLimit() - 256 * sizeof(size_t));
 
+    store_->Start();
+  }
   main_service_.run();
-
   Shutdown();
 #ifdef _WINSOCKAPI_
   WSACleanup();
@@ -123,13 +124,19 @@ void PlasmaStoreRunner::Start() {
 }
 
 void PlasmaStoreRunner::Stop() {
-  store_->Stop();
+  absl::MutexLock lock(&store_runner_mutex_);
+  if (store_) {
+    store_->Stop();
+  }
   main_service_.stop();
 }
 
 void PlasmaStoreRunner::Shutdown() {
-  store_->Stop();
-  store_ = nullptr;
+  absl::MutexLock lock(&store_runner_mutex_);
+  if (store_) {
+    store_->Stop();
+    store_ = nullptr;
+  }
 }
 
 std::unique_ptr<PlasmaStoreRunner> plasma_store_runner;
diff --git a/src/ray/object_manager/plasma/store_runner.h b/src/ray/object_manager/plasma/store_runner.h
index 4b45ed9b9..c55535415 100644
--- a/src/ray/object_manager/plasma/store_runner.h
+++ b/src/ray/object_manager/plasma/store_runner.h
@@ -4,6 +4,7 @@
 
 #include <boost/asio.hpp>
 
+#include "absl/synchronization/mutex.h"
 #include "ray/object_manager/notification/object_store_notification_manager.h"
 #include "ray/object_manager/plasma/store.h"
 
@@ -16,13 +17,14 @@ class PlasmaStoreRunner {
                     const std::string external_store_endpoint);
   void Start();
   void Stop();
-  void Shutdown();
   void SetNotificationListener(
       const std::shared_ptr<ray::ObjectStoreNotificationManager> &notification_listener) {
     store_->SetNotificationListener(notification_listener);
   }
 
  private:
+  void Shutdown();
+  absl::Mutex store_runner_mutex_;
   std::string socket_name_;
   int64_t system_memory_;
   bool hugepages_enabled_;