response client after lock release(only used in mysqltest)

deps/oblib/src/lib/utility/ob_tracepoint.h

@@ -447,7 +447,6 @@ public:
     EN_BACKUP_CHECK_BACKUP_POINT_EXIST = 185,
     EN_STOP_TENANT_LOG_ARCHIVE_BACKUP = 186,
     EN_BACKUP_SERVER_DISK_IS_FULL = 188,
-    // 下面请从201开始
     EN_CHECK_STANDBY_CLUSTER_SCHEMA_CONDITION = 201,
     EN_ALLOCATE_LOB_BUF_FAILED = 202,
     EN_ALLOCATE_DESERIALIZE_LOB_BUF_FAILED = 203,
@@ -506,6 +505,7 @@ public:
     // DDL related 500-550
     EN_SUBMIT_INDEX_TASK_ERROR_BEFORE_STAT_RECORD = 503,
     EN_SUBMIT_INDEX_TASK_ERROR_AFTER_STAT_RECORD = 504,
+    EN_EARLY_RESPONSE_SCHEDULER = 509,
 
     EVENT_TABLE_MAX = SIZE_OF_EVENT_TABLE
   };

src/storage/transaction/ob_trans_coord_ctx.cpp

@@ -920,6 +920,15 @@ int ObCoordTransCtx::check_and_response_scheduler_(const int64_t msg_type)
     already_response_ = true;
   }
 #endif
+  // for error sim test
+  ret = E(EventTable::EN_EARLY_RESPONSE_SCHEDULER) OB_SUCCESS;
+  if (OB_FAIL(ret)) {
+    if (get_state_() != Ob2PCState::CLEAR) {
+      // don't response scheduler
+      return OB_SUCCESS;
+    }
+    ret = OB_SUCCESS;
+  }
   if (!is_inited_) {
     ret = OB_NOT_INIT;
   } else if (!ObTransMsgTypeChecker::is_valid_msg_type(msg_type)) {