diff --git a/mittest/mtlenv/storage/test_ls_tablet_service.cpp b/mittest/mtlenv/storage/test_ls_tablet_service.cpp
index 6bafbe2fc..a8130daba 100644
--- a/mittest/mtlenv/storage/test_ls_tablet_service.cpp
+++ b/mittest/mtlenv/storage/test_ls_tablet_service.cpp
@@ -1135,6 +1135,10 @@ TEST_F(TestLSTabletService, test_empty_shell_mds_compat)
   ASSERT_TRUE(nullptr == upgrade_tablet.mds_data_);
   ASSERT_TRUE(ObTabletStatus::Status::DELETED == upgrade_tablet.tablet_meta_.last_persisted_committed_tablet_status_.tablet_status_);
 
+  // release tmp memory and tablet
+  empty_shell_tablet.mds_data_->~ObTabletMdsData();
+  compat_allocator.free(empty_shell_tablet.mds_data_);
+  empty_shell_tablet.mds_data_ = nullptr;
   ret = ls_tablet_service_->do_remove_tablet(ls_id_, tablet_id);
   ASSERT_EQ(OB_SUCCESS, ret);
 }
diff --git a/src/storage/blocksstable/ob_sstable_meta.cpp b/src/storage/blocksstable/ob_sstable_meta.cpp
index 565aae928..3fbeef57d 100644
--- a/src/storage/blocksstable/ob_sstable_meta.cpp
+++ b/src/storage/blocksstable/ob_sstable_meta.cpp
@@ -64,9 +64,9 @@ ObSSTableBasicMeta::ObSSTableBasicMeta()
     master_key_id_(0),
     sstable_logic_seq_(0),
     latest_row_store_type_(ObRowStoreType::MAX_ROW_STORE),
-    root_macro_seq_(0),
     table_backup_flag_(),
-    table_shared_flag_()
+    table_shared_flag_(),
+    root_macro_seq_(0)
 {
   MEMSET(encrypt_key_, 0, share::OB_MAX_TABLESPACE_ENCRYPT_KEY_LENGTH);
 }
@@ -248,7 +248,8 @@ DEFINE_SERIALIZE(ObSSTableBasicMeta)
                   sstable_logic_seq_,
                   latest_row_store_type_,
                   table_backup_flag_,
-                  table_shared_flag_);
+                  table_shared_flag_,
+                  root_macro_seq_);
       if (OB_FAIL(ret)) {
       } else if (OB_UNLIKELY(length_ != pos - start_pos)) {
         ret = OB_ERR_UNEXPECTED;
@@ -330,7 +331,8 @@ int ObSSTableBasicMeta::decode_for_compat(const char *buf, const int64_t data_le
               sstable_logic_seq_,
               latest_row_store_type_,
               table_backup_flag_,
-              table_shared_flag_);
+              table_shared_flag_,
+              root_macro_seq_);
   return ret;
 }
 
@@ -373,7 +375,8 @@ DEFINE_GET_SERIALIZE_SIZE(ObSSTableBasicMeta)
               sstable_logic_seq_,
               latest_row_store_type_,
               table_backup_flag_,
-              table_shared_flag_);
+              table_shared_flag_,
+              root_macro_seq_);
   return len;
 }
 
diff --git a/src/storage/blocksstable/ob_sstable_meta.h b/src/storage/blocksstable/ob_sstable_meta.h
index 1562a66ae..70092fc41 100644
--- a/src/storage/blocksstable/ob_sstable_meta.h
+++ b/src/storage/blocksstable/ob_sstable_meta.h
@@ -187,10 +187,10 @@ public:
   int16_t sstable_logic_seq_;
   common::ObRowStoreType latest_row_store_type_;
   char encrypt_key_[share::OB_MAX_TABLESPACE_ENCRYPT_KEY_LENGTH];
-  int64_t root_macro_seq_; // placeholder, will be used after palf branch merged
   storage::ObTableBackupFlag table_backup_flag_;  //cannot add backup flag to ObSSTableMetaChecker
                                                   //quick restore with rebuild replace major will has same key sstable
   storage::ObTableSharedFlag table_shared_flag_;
+  int64_t root_macro_seq_; // placeholder, will be used after palf branch merged
   //Add new variable need consider ObSSTableMetaChecker
 };
 
diff --git a/unittest/storage/blocksstable/test_sstable_meta.cpp b/unittest/storage/blocksstable/test_sstable_meta.cpp
index 942570d15..e0a9abb41 100644
--- a/unittest/storage/blocksstable/test_sstable_meta.cpp
+++ b/unittest/storage/blocksstable/test_sstable_meta.cpp
@@ -630,6 +630,7 @@ TEST_F(TestSSTableMeta, test_sstable_meta_deep_copy)
   const int64_t buf_size = 8 << 10; //8K
   int64_t pos = 0;
   char *flat_buf_1 = (char*)ob_malloc(buf_size, ObMemAttr());
+  MEMSET(flat_buf_1, 0, buf_size);
   int64_t deep_copy_size = src_meta.get_deep_copy_size();
   ObSSTableMeta *flat_meta_1;
   ret = src_meta.deep_copy(flat_buf_1, deep_copy_size, pos, flat_meta_1);
@@ -637,11 +638,10 @@ TEST_F(TestSSTableMeta, test_sstable_meta_deep_copy)
   ASSERT_EQ(deep_copy_size, pos);
   OB_LOG(INFO, "cooper", K(src_meta), K(sizeof(ObSSTableMeta)), K(deep_copy_size));
   OB_LOG(INFO, "cooper", K(*flat_meta_1));
-  // can't use MEMCMP between dynamic memory and flat memory, because one is stack, the other is heap
   ASSERT_EQ(src_meta.basic_meta_, flat_meta_1->basic_meta_);
-  // ASSERT_EQ(0, MEMCMP((char*)&src_meta.data_root_info_, (char*)&flat_meta_1->data_root_info_, sizeof(src_meta.data_root_info_)));
-  // ASSERT_EQ(0, MEMCMP((char*)&src_meta.macro_info_, (char*)&dst_meta->macro_info_, sizeof(src_meta.macro_info_)));
-  // ASSERT_EQ(0, MEMCMP((char*)&src_meta.cg_sstables_, (char*)&dst_meta->cg_sstables_, sizeof(src_meta.cg_sstables_)));
+  ASSERT_EQ(0, MEMCMP((char*)&src_meta.data_root_info_, (char*)&flat_meta_1->data_root_info_, sizeof(src_meta.data_root_info_)));
+  ASSERT_EQ(0, MEMCMP((char*)&src_meta.macro_info_, (char*)&flat_meta_1->macro_info_, sizeof(src_meta.macro_info_)));
+  // ASSERT_EQ(0, MEMCMP((char*)&src_meta.cg_sstables_, (char*)&flat_meta_1->cg_sstables_, sizeof(src_meta.cg_sstables_)));
   ASSERT_EQ(0, MEMCMP(src_meta.column_checksums_, flat_meta_1->column_checksums_, src_meta.column_checksum_count_ * sizeof(int64_t)));
   ASSERT_EQ(src_meta.tx_ctx_.len_, flat_meta_1->tx_ctx_.len_);
   ASSERT_EQ(src_meta.tx_ctx_.count_, flat_meta_1->tx_ctx_.count_);
@@ -650,6 +650,7 @@ TEST_F(TestSSTableMeta, test_sstable_meta_deep_copy)
   // test deep copy from flat memory meta to flat memory meta
   pos = 0;
   char *flat_buf_2 = (char*)ob_malloc_align(4<<10, buf_size, ObMemAttr());
+  MEMSET(flat_buf_2, 0, buf_size);
   deep_copy_size = flat_meta_1->get_deep_copy_size();
   ObSSTableMeta *flat_meta_2;
   ret = flat_meta_1->deep_copy(flat_buf_2, deep_copy_size, pos, flat_meta_2);