安装gentoovm后，emerge --sync出错

ejacob

gentoovm版本为2006，
emerge --sync出现以下错误代码

rsync: read error: Connection reset by peer (104)
rsync error: error in rsync protocol data stream (code 12) at io.c(616) [receiver=2.6.8]
rsync: connection unexpectedly closed (3229543 bytes received so far) [generator]
rsync error: error in rsync protocol data stream (code 12) at io.c(465) [generator=2.6.8]

请问这是怎么回事？