diff --git a/src/observer/omt/ob_tenant.cpp b/src/observer/omt/ob_tenant.cpp
index 525fecdb4a..2adff27b60 100644
--- a/src/observer/omt/ob_tenant.cpp
+++ b/src/observer/omt/ob_tenant.cpp
@@ -196,10 +196,11 @@ int ObPxPools::DeletePoolFunc::operator() (common::hash::HashMapPair<int64_t, Ob
 void ObPxPools::mtl_stop(ObPxPools *&pools)
 {
   int ret = OB_SUCCESS;
-  common::SpinWLockGuard g(pools->lock_);
   if (OB_ISNULL(pools)) {
+    // pools will be null if it's creating tenant and failed.
     LOG_WARN("pools is null");
   } else {
+    common::SpinWLockGuard g(pools->lock_);
     StopPoolFunc stop_pool_func;
     if (OB_FAIL(pools->pool_map_.foreach_refactored(stop_pool_func))) {
       LOG_WARN("failed to do foreach", K(ret));