ra_serf: The server sent a truncated HTTP response body.
ra_serf：服务器发送的HTTP响应体截断。
The data sent is too big and the server closes the connection due to reaching
a limit.
Possible steps which can help fix this issue:
* Increase the timeout value on the server
*
set compression level to zero on the server (will make everything
slower but helps with this issue)
* make sure all proxies that are in between you and the svn server also
have the timeout values increased
以上的这些解决办法实现起来都比较困难，其实只要自己在网速好的时候重新更新就可以。
ra_serf: The server sent a truncated HTTP response body.
原文：http://blog.csdn.net/wxb1553725576/article/details/42144205