diff --git a/deps/oblib/src/lib/stat/ob_session_stat.h b/deps/oblib/src/lib/stat/ob_session_stat.h
index bf133b9949..f12f3062b5 100644
--- a/deps/oblib/src/lib/stat/ob_session_stat.h
+++ b/deps/oblib/src/lib/stat/ob_session_stat.h
@@ -81,7 +81,9 @@ public:
       if (NULL != buffer_) {
         prev_tenant_id_ = buffer_->get_tenant_id();
         if (0 < tenant_id) {
-          buffer_->switch_tenant(tenant_id);
+          if (OB_UNLIKELY(OB_SUCCESS != buffer_->switch_tenant(tenant_id))) {
+            buffer_ = nullptr;
+          }
         }
       }
     } else {
@@ -138,7 +140,8 @@ inline int ObSessionDIBuffer::switch_tenant(const uint64_t tenant_id)
   if (OB_SYS_TENANT_ID == tenant_id) {
     curr_tenant_collect_ = sys_tenant_collect_;
   } else {
-    if (tenant_id == not_sys_tenant_collect_->tenant_id_) {
+    if (OB_NOT_NULL(not_sys_tenant_collect_)
+        && tenant_id == not_sys_tenant_collect_->tenant_id_) {
     } else {
       ret = tenant_cache_.get_node(tenant_id, not_sys_tenant_collect_);
     }