OpenStream call sendWindowUpdate, then sendWindowUpdate will sync window from client to server.
incrSendWindow and wirte will happen race. if incrSendWindow first run it is ok, else will lead sendWindow is not the same value to recvWindow, will out of sync.
OpenStream call sendWindowUpdate, then sendWindowUpdate will sync window from client to server. incrSendWindow and wirte will happen race. if incrSendWindow first run it is ok, else will lead sendWindow is not the same value to recvWindow, will out of sync.