diff --git a/src/storage/compaction/ob_medium_compaction_mgr.cpp b/src/storage/compaction/ob_medium_compaction_mgr.cpp
index ba26a04452..b475e08639 100644
--- a/src/storage/compaction/ob_medium_compaction_mgr.cpp
+++ b/src/storage/compaction/ob_medium_compaction_mgr.cpp
@@ -818,6 +818,7 @@ int ObMediumCompactionInfoList::init_after_check_finish(
 void ObMediumCompactionInfoList::reset_list()
 {
   DLIST_REMOVE_ALL_NORET(info, medium_info_list_) {
+    medium_info_list_.remove(info);
     static_cast<ObMediumCompactionInfo *>(info)->~ObMediumCompactionInfo();
     allocator_->free(info);
   }
@@ -828,7 +829,6 @@ void ObMediumCompactionInfoList::reset()
 {
   if (OB_NOT_NULL(allocator_)) {
     reset_list();
-    medium_info_list_.reset();
   }
   is_inited_ = false;
   info_ = 0;
diff --git a/src/storage/ls/ob_ls.cpp b/src/storage/ls/ob_ls.cpp
index 2922a6fa2e..dc1fcf676d 100644
--- a/src/storage/ls/ob_ls.cpp
+++ b/src/storage/ls/ob_ls.cpp
@@ -932,9 +932,6 @@ int ObLS::try_sync_reserved_snapshot(
   } else {
     ObRole role = INVALID_ROLE;
     int64_t proposal_id = 0;
-    int64_t read_lock = LSLOCKLS | LSLOCKLOG;
-    int64_t write_lock = 0;
-    ObLSLockGuard lock_myself(lock_, read_lock, write_lock);
     if (is_stopped_) {
       // do nothing
     } else if (OB_FAIL(log_handler_.get_role(role, proposal_id))) {
diff --git a/src/storage/ls/ob_ls_reserved_snapshot_mgr.cpp b/src/storage/ls/ob_ls_reserved_snapshot_mgr.cpp
index 8d5d59e890..d3b783c712 100644
--- a/src/storage/ls/ob_ls_reserved_snapshot_mgr.cpp
+++ b/src/storage/ls/ob_ls_reserved_snapshot_mgr.cpp
@@ -27,6 +27,7 @@ ObLSReservedSnapshotMgr::ObLSReservedSnapshotMgr()
    min_reserved_snapshot_(0),
    next_reserved_snapshot_(0),
    snapshot_lock_(),
+   sync_clog_lock_(),
    ls_(nullptr),
    ls_handle_(),
    dependent_tablet_set_(),
@@ -221,8 +222,11 @@ int ObLSReservedSnapshotMgr::sync_clog(const int64_t new_reserved_snapshot)
     LOG_WARN("fail to get data version", K(ret));
   } else if (compat_version < DATA_VERSION_4_1_0_0) {
     // do nothing, should sync clog
-  } else if (OB_FAIL(try_update_for_leader(new_reserved_snapshot, nullptr/*allocator*/))) {
-    LOG_WARN("failed to send update reserved snapshot log", K(ret), K(new_reserved_snapshot));
+  } else {
+    ObMutexGuard guard(sync_clog_lock_);
+    if (OB_FAIL(try_update_for_leader(new_reserved_snapshot, nullptr/*allocator*/))) {
+      LOG_WARN("failed to send update reserved snapshot log", K(ret), K(new_reserved_snapshot));
+    }
   }
   return ret;
 }
diff --git a/src/storage/ls/ob_ls_reserved_snapshot_mgr.h b/src/storage/ls/ob_ls_reserved_snapshot_mgr.h
index 8d48af4bfa..0f56759bd1 100644
--- a/src/storage/ls/ob_ls_reserved_snapshot_mgr.h
+++ b/src/storage/ls/ob_ls_reserved_snapshot_mgr.h
@@ -97,6 +97,7 @@ private:
   int64_t min_reserved_snapshot_;
   int64_t next_reserved_snapshot_;
   mutable common::TCRWLock snapshot_lock_;
+  lib::ObMutex sync_clog_lock_;
   storage::ObLS *ls_;
   ObLSHandle ls_handle_;
   common::hash::ObHashSet<uint64_t, hash::NoPthreadDefendMode> dependent_tablet_set_; // tablet_id
diff --git a/src/storage/ob_tenant_tablet_stat_mgr.cpp b/src/storage/ob_tenant_tablet_stat_mgr.cpp
index 8ae3f5a294..1c3c18ab8d 100644
--- a/src/storage/ob_tenant_tablet_stat_mgr.cpp
+++ b/src/storage/ob_tenant_tablet_stat_mgr.cpp
@@ -465,6 +465,10 @@ void ObTenantTabletStatMgr::destroy()
   {
     ObBucketWLockAllGuard lock_guard(bucket_lock_);
     stream_map_.destroy();
+    DLIST_REMOVE_ALL_NORET(node, lru_list_) {
+      lru_list_.remove(node);
+      stream_pool_.free(node);
+    }
     lru_list_.reset();
     stream_pool_.destroy();
     report_cursor_ = 0;
@@ -643,6 +647,7 @@ int ObTenantTabletStatMgr::fetch_node(ObTabletStreamNode *&node)
   } else if (!lru_list_.add_first(node)) {
     ret = OB_ERR_UNEXPECTED;
     LOG_WARN("failed to add node to lru list", K(ret), KPC(node));
+    stream_pool_.free(node);
   }
   return ret;
 }