Fix milvus crash when exiting (#3333)

* Fix server crash when exiting
Signed-off-by: Nyinghao.zou <yinghao.zou@zilliz.com>

* Simplify web server
Signed-off-by: Nyinghao.zou <yinghao.zou@zilliz.com>

core/cmake/ThirdPartyPackages.cmake

@@ -240,8 +240,8 @@ endif ()
 if (DEFINED ENV{MILVUS_OATPP_URL})
     set(OATPP_SOURCE_URL "$ENV{MILVUS_OATPP_URL}")
 else ()
-     set(OATPP_SOURCE_URL "https://github.com/oatpp/oatpp/archive/${OATPP_VERSION}.tar.gz")
-#    set(OATPP_SOURCE_URL "https://github.com/BossZou/oatpp/archive/${OATPP_VERSION}.zip")
+    set(OATPP_SOURCE_URL "https://github.com/oatpp/oatpp/archive/${OATPP_VERSION}.tar.gz")
+#   set(OATPP_SOURCE_URL "https://github.com/BossZou/oatpp/archive/${OATPP_VERSION}.zip")
 endif ()
 
 if (DEFINED ENV{MILVUS_AWS_URL})

core/src/scheduler/SchedInst.cpp

@@ -102,6 +102,7 @@ StopSchedulerService() {
     JobMgrInst::GetInstance()->Stop();
     SchedInst::GetInstance()->Stop();
     ResMgrInst::GetInstance()->Stop();
+    OptimizerInst::GetInstance()->Stop();
 }
 
 }  // namespace scheduler

core/src/scheduler/selector/Optimizer.cpp

@@ -32,5 +32,10 @@ Optimizer::Run(const TaskPtr& task) {
     return false;
 }
 
+void
+Optimizer::Stop() {
+    pass_list_ = std::vector<PassPtr>();
+}
+
 }  // namespace scheduler
 }  // namespace milvus

core/src/scheduler/selector/Optimizer.h

@@ -38,6 +38,9 @@ class Optimizer {
     bool
     Run(const TaskPtr& task);
 
+    void
+    Stop();
+
  private:
     std::vector<PassPtr> pass_list_;
 };

core/src/server/web_impl/WebServer.cpp

@@ -65,13 +65,10 @@ WebServer::StartService() {
             }
 
             server.stop();
-            OATPP_COMPONENT(std::shared_ptr<oatpp::network::ClientConnectionProvider>, client_provider);
-            client_provider->getConnection();
         });
 
         // start synchronously
         server.run();
-        connection_handler->stop();
         stop_thread.join();
     }
     oatpp::base::Environment::destroy();