fix: set manager at the worker #9

manager.go

@@ -169,6 +169,7 @@ func (m *Manager) AddWorker(worker Worker) error {
 
 	// add worker to workerMap
 	m.workerMap[worker.GetID()] = worker
+	worker.SetManager(m)
 
 	return m.checkAndSetRunningState()
 }