diff --git a/deps/oblib/src/lib/ob_define.h b/deps/oblib/src/lib/ob_define.h
index a1376164d..11e9a9611 100644
--- a/deps/oblib/src/lib/ob_define.h
+++ b/deps/oblib/src/lib/ob_define.h
@@ -2457,10 +2457,10 @@ OB_INLINE char* ob_get_tname()
   return tname;
 }
 
-OB_INLINE const char*& ob_get_origin_thread_name()
+OB_INLINE char* ob_get_origin_thread_name()
 {
-  thread_local const char* tname = nullptr;
-  return tname;
+  thread_local char ori_tname[oceanbase::OB_THREAD_NAME_BUF_LEN] = {0};
+  return ori_tname;
 }
 
 static const char* PARALLEL_DDL_THREAD_NAME = "DDLPQueueTh";
diff --git a/deps/oblib/src/lib/thread/ob_thread_name.h b/deps/oblib/src/lib/thread/ob_thread_name.h
index eaf360168..4ab933ad2 100644
--- a/deps/oblib/src/lib/thread/ob_thread_name.h
+++ b/deps/oblib/src/lib/thread/ob_thread_name.h
@@ -32,7 +32,8 @@ inline void set_thread_name(const char* type, uint64_t idx)
 {
   char *name = ob_get_tname();
   uint64_t tenant_id = ob_get_tenant_id();
-  ob_get_origin_thread_name() = type;
+  char *ori_tname = ob_get_origin_thread_name();
+  STRNCPY(ori_tname, type, oceanbase::OB_THREAD_NAME_BUF_LEN);
   if (tenant_id == 0) {
     snprintf(name, OB_THREAD_NAME_BUF_LEN, "%s%ld", type, idx);
   } else {
@@ -45,7 +46,8 @@ inline void set_thread_name(const char* type)
 {
   char *name = ob_get_tname();
   uint64_t tenant_id = ob_get_tenant_id();
-  ob_get_origin_thread_name() = type;
+  char *ori_tname = ob_get_origin_thread_name();
+  STRNCPY(ori_tname, type, oceanbase::OB_THREAD_NAME_BUF_LEN);
   if (tenant_id == 0) {
     snprintf(name, OB_THREAD_NAME_BUF_LEN, "%s", type);
   } else {