[BUG.FIX] fix sstable pool error when the observer is killed.

src/share/rc/ob_tenant_base.h

@@ -160,6 +160,7 @@ namespace detector
   MTL_LIST(                                          \
       common::ObTenantIOManager*,                    \
       storage::ObStorageLogger*,                     \
+      blocksstable::ObSharedMacroBlockMgr*,          \
       storage::ObTenantMetaMemMgr*,                  \
       transaction::ObTransService*,                  \
       logservice::coordinator::ObLeaderCoordinator*, \
@@ -202,7 +203,6 @@ namespace detector
       sql::ObDataAccessService*,                     \
       sql::ObDASIDService*,                          \
       share::schema::ObTenantSchemaService*,         \
-      blocksstable::ObSharedMacroBlockMgr*,          \
       storage::ObTenantFreezer*,                     \
       storage::checkpoint::ObCheckPointService *,    \
       storage::checkpoint::ObTabletGCService *,      \

src/storage/meta_mem/ob_tenant_meta_mem_mgr.cpp

@@ -205,11 +205,14 @@ void ObTenantMetaMemMgr::wait()
 
 void ObTenantMetaMemMgr::destroy()
 {
+  int ret = OB_SUCCESS;
+  bool is_all_clean = false;
   tablet_map_.destroy();
-  bucket_lock_.destroy();
-  allocator_.reset();
   last_min_minor_sstable_set_.destroy();
   pinned_tablet_set_.destroy();
+  while (!is_all_clean && OB_SUCC(gc_tables_in_queue(is_all_clean)));
+  bucket_lock_.destroy();
+  allocator_.reset();
   timer_.destroy();
   for (int64_t i = 0; i <= ObITable::TableType::REMOTE_LOGICAL_MINOR_SSTABLE; i++) {
     pool_arr_[i] = nullptr;

unittest/storage/tx_table/test_tx_ctx_table.cpp

@@ -140,7 +140,7 @@ protected:
     mt_mgr_ = NULL;
     ctx_mt_mgr_ = NULL;
 
-    ASSERT_EQ(1, ref_count_);
+    ASSERT_EQ(0, ref_count_);
 
     tenant_base_.destroy();
     ObTenantEnv::set_tenant(nullptr);