[fix](group commit)Fix wal manager ut (apache#48882)

pick pr:apache#48789

Author: hust-hhb

be/src/runtime/exec_env.h

@@ -294,7 +294,8 @@ class ExecEnv {
     void set_routine_load_task_executor(RoutineLoadTaskExecutor* r) {
         this->_routine_load_task_executor = r;
     }
-    void set_wal_mgr(std::shared_ptr<WalManager> wm) { this->_wal_manager = wm; }
+    void set_wal_mgr(std::shared_ptr<WalManager>&& wm);
+    void clear_wal_mgr();
     void set_dummy_lru_cache(std::shared_ptr<DummyLRUCache> dummy_lru_cache) {
         this->_dummy_lru_cache = dummy_lru_cache;
     }

be/src/runtime/exec_env_init.cpp

@@ -643,6 +643,15 @@ Status ExecEnv::_check_deploy_mode() {
     return Status::OK();
 }
 
+#ifdef BE_TEST
+void ExecEnv::set_wal_mgr(std::shared_ptr<WalManager>&& wm) {
+    this->_wal_manager = std::move(wm);
+}
+void ExecEnv::clear_wal_mgr() {
+    this->_wal_manager.reset();
+}
+#endif
+
 // TODO(zhiqiang): Need refactor all thread pool. Each thread pool must have a Stop method.
 // We need to stop all threads before releasing resource.
 void ExecEnv::destroy() {

be/test/http/stream_load_test.cpp

@@ -45,7 +45,10 @@ class StreamLoadTest : public testing::Test {
     StreamLoadTest() = default;
     virtual ~StreamLoadTest() = default;
     void SetUp() override {}
-    void TearDown() override {}
+    void TearDown() override {
+        SAFE_STOP(ExecEnv::GetInstance()->_wal_manager);
+        ExecEnv::GetInstance()->clear_wal_mgr();
+    }
 };
 
 void http_request_done_cb(struct evhttp_request* req, void* arg) {
@@ -58,7 +61,7 @@ TEST_F(StreamLoadTest, TestHeader) {
     static_cast<void>(wal_mgr->_wal_dirs_info->add("test_path_1", 1000, 0, 0));
     static_cast<void>(wal_mgr->_wal_dirs_info->add("test_path_2", 10000, 0, 0));
     static_cast<void>(wal_mgr->_wal_dirs_info->add("test_path_3", 100000, 0, 0));
-    ExecEnv::GetInstance()->set_wal_mgr(wal_mgr);
+    ExecEnv::GetInstance()->set_wal_mgr(std::move(wal_mgr));
     // 1. empty info
     {
         auto* evhttp_req = evhttp_request_new(nullptr, nullptr);