fix mysql test case && ObTenantTableStatMgr::destroy

src/storage/compaction/ob_medium_compaction_func.cpp

@@ -745,21 +745,28 @@ int ObMediumCompactionScheduleFunc::freeze_memtable_to_get_medium_info()
   } else {
     memtable::ObMemtable *memtable = nullptr;
     bool receive_medium_info = false;
+    bool has_medium_info = false;
     for (int i = 0; OB_SUCC(ret) && i < memtables.count(); ++i) {
       if (OB_ISNULL(memtable = static_cast<memtable::ObMemtable*>(memtables.at(i)))) {
         ret = OB_ERR_UNEXPECTED;
         LOG_WARN("memtable is null", K(ret), K(i), KPC(memtables.at(i)), K(memtable));
       } else if (memtable->has_multi_source_data_unit(memtable::MultiSourceDataUnitType::MEDIUM_COMPACTION_INFO)) {
-        receive_medium_info = true;
+        has_medium_info = true;
-        break;
+        if (memtable->is_active_memtable()) {
+          receive_medium_info = true;
+          break;
+        }
       }
     } // end of for
-    if (OB_SUCC(ret) && receive_medium_info) {
+    if (OB_FAIL(ret)) {
+    } else if (receive_medium_info) {
       if (OB_FAIL(MTL(ObTenantFreezer *)->tablet_freeze(tablet_.get_tablet_meta().tablet_id_, false/*force_freeze*/))) {
         if (OB_TABLE_NOT_EXIST != ret) {
           LOG_WARN("failed to freeze tablet", K(ret), KPC(this));
         }
       }
+    } else if (has_medium_info) {
+      LOG_INFO("received medium info, the memtable is frozen, no need to freeze tablet again", K(ret), K(tablet_));
     }
   }
   return ret;

src/storage/compaction/ob_tenant_tablet_scheduler.cpp

@@ -1023,7 +1023,7 @@ int ObTenantTabletScheduler::schedule_all_tablets_medium()
         tenant_merge_finish = false;
         if (OB_SIZE_OVERFLOW == tmp_ret) {
           break;
-        } else if (OB_LS_NOT_EXIST != ret) {
+        } else if (OB_LS_NOT_EXIST != tmp_ret) {
           LOG_WARN("failed to schedule ls merge", K(tmp_ret), KPC(ls));
         }
       } else {

src/storage/ob_tenant_tablet_stat_mgr.cpp

@@ -465,8 +465,8 @@ void ObTenantTabletStatMgr::destroy()
   {
     ObBucketWLockAllGuard lock_guard(bucket_lock_);
     stream_map_.destroy();
-    stream_pool_.destroy();
     lru_list_.reset();
+    stream_pool_.destroy();
     report_cursor_ = 0;
     pending_cursor_ = 0;
     report_tg_id_ = 0;