HI Joachim and all, I guess two situations may help to reproduce it:
1. I am behind two NATs, one is a home router, one is the connection point from ISP to Internet (maybe more, depends on ISP). 2. The network speed is slow from my pc to hackage server (about 10KB/s) And there is another phenomenon after I reported the bug: I tried again (3 times) to do cabal update, with two times get partial content (almost full, let me say, only ~200k lost compared to a wget-ed and verified version but I didn't record the number ) after about 10 minutes then it reported the tarball is broken; and the last time it hangs with 3 hours so I did Ctrl-C to exit (same as the bug report itself). If you need I can do more times and give some accurate data (time/size). >From the new phenomenon, I guess again it is about a weak design of tcp itself: when there is only one direction of data flow, the sender may close the tcp link more quickly than the receiver at certain condition: for some point the sender lose all data packages (and re-transmissions) to the receiver, and the receiver don't know it at all. Although it is a tcp weakness, AFAIK, this should be overcome by some upper layer protocol implementation. And another thing I am surprised is about proxychains, it is 100% segmentation fault on my side. I just use a ssh dynamic port forwarding and in wget case it can speed up the download to hackage server. It should be easy to reproduce in my opinion. Best, Zengbo 2013/11/4 Joachim Breitner <nome...@debian.org> > Hi, > > Am Sonntag, den 03.11.2013, 19:41 +0800 schrieb Zhang Zengbo: > > I am a new user of haskell-platform. After I installed it, I simply run: > > cabal update, it hangs, then I try to use --verbose=3 to see what > happend: > > unfortuately, I cannot reproduce it here. Is there anything special > about your network setup? E.g. forced proxies or something of the kind? > > Greetings, > Joachim > > -- > Joachim "nomeata" Breitner > Debian Developer > nome...@debian.org | ICQ# 74513189 | GPG-Keyid: 4743206C > JID: nome...@joachim-breitner.de | http://people.debian.org/~nomeata > > >