Remove sending newSegmentMsg to rootcoord (#6301)

Signed-off-by: Nsunby <bingyi.sun@zilliz.com>

internal/datacoord/server.go

@@ -71,14 +71,13 @@ type Server struct {
 	serverLoopWg     sync.WaitGroup
 	isServing        ServerState
 
-	kvClient          *etcdkv.EtcdKV
-	meta              *meta
-	segmentInfoStream msgstream.MsgStream
-	segmentManager    Manager
-	allocator         allocator
-	cluster           *cluster
-	rootCoordClient   types.RootCoord
-	ddChannelName     string
+	kvClient        *etcdkv.EtcdKV
+	meta            *meta
+	segmentManager  Manager
+	allocator       allocator
+	cluster         *cluster
+	rootCoordClient types.RootCoord
+	ddChannelName   string
 
 	flushCh   chan UniqueID
 	msFactory msgstream.Factory
@@ -155,10 +154,6 @@ func (s *Server) Start() error {
 		return err
 	}
 
-	if err = s.initSegmentInfoChannel(); err != nil {
-		return err
-	}
-
 	s.allocator = newRootCoordAllocator(s.ctx, s.rootCoordClient)
 
 	s.startSegmentManager()
@@ -231,20 +226,7 @@ func (s *Server) loadDataNodes() []*datapb.DataNodeInfo {
 }
 
 func (s *Server) startSegmentManager() {
-	helper := createNewSegmentHelper(s.segmentInfoStream)
-	s.segmentManager = newSegmentManager(s.meta, s.allocator, withAllocHelper(helper))
-}
-
-func (s *Server) initSegmentInfoChannel() error {
-	var err error
-	s.segmentInfoStream, err = s.msFactory.NewMsgStream(s.ctx)
-	if err != nil {
-		return err
-	}
-	s.segmentInfoStream.AsProducer([]string{Params.SegmentInfoChannelName})
-	log.Debug("DataCoord AsProducer: " + Params.SegmentInfoChannelName)
-	s.segmentInfoStream.Start()
-	return nil
+	s.segmentManager = newSegmentManager(s.meta, s.allocator)
 }
 
 func (s *Server) initMeta() error {
@@ -501,7 +483,6 @@ func (s *Server) Stop() error {
 	log.Debug("DataCoord server shutdown")
 	atomic.StoreInt64(&s.isServing, ServerStateStopped)
 	s.cluster.releaseSessions()
-	s.segmentInfoStream.Close()
 	s.stopServerLoop()
 	return nil
 }