// Stop server.
func (vs *ViewServer) stop() {
logger.Info("Closing view server...")
rpc.Close(vs)
vs.alive.Set(false)
<-vs.done
}
// Close worker.
func (w *Worker) Shutdown(args *ShutdownArgs, reply *ShutdownReply) error {
reply.OK = true
reply.MapperNum = w.mapperNum
reply.ReducerNum = w.reducerNum
rpc.Close(w)
return nil
}
// Stop this server.
func (s *PBServer) stop() {
logger.Info(fmt.Sprintf("Pbserver %s is closing...", s.addr))
rpc.Close(s)
s.alive.Set(false)
<-s.done
logger.Info(fmt.Sprintf("Close pbserver %s done", s.addr))
}
// Stop the master and all workers.
func (m *Master) shutdown() {
logger.Info("Closing master...")
m.idleWorkers.Close()
rpc.Close(m)
args := new(ShutdownArgs)
reply := new(ShutdownReply)
for _, w := range m.workers {
if err := rpc.Call(w, "Worker.Shutdown", args, reply); err != nil {
logger.Info(fmt.Sprintf("Worker %s shutdown error: %s", w, err))
} else {
logger.Info(fmt.Sprintf("Worker %s runs %d mappers, %d reducers",
w, reply.MapperNum, reply.ReducerNum))
}
}
logger.Info("Close master done")
}
func (w *Worker) run() {
// Register as a rpc server
rpc.Register(w, w.address)
// Register as a worker for master.
args := &RegisterArgs{
Worker: w.address,
}
reply := new(RegisterReply)
err := rpc.Call(masterAddress, "Master.Register", args, reply)
if err != nil {
logger.Error(fmt.Sprintf("Cannot register %s as a worker", err))
rpc.Close(w)
return
}
w.file = reply.File
w.mapper = reply.CMapper
w.reducer = reply.CReducer
w.nMapper = reply.NumMapper
w.nReducer = reply.NumReducer
}