On Wed, 1 Sep 2004 09:11:58 -0700, Michael Stenner wrote: > On Wed, Sep 01, 2004 at 11:22:29AM -0400, David L. Parsley wrote: > > > unless your repos are REAAAAAAAAAAAAAAALLY slow, I've found that a hang > > > in yum is most often caused by an rpmdb lockup. > > > -sv > > > > > This issue was traced to a problem with ftp repos. The hung yum process > > has an open ftp control connection, with no packets queued for sending - > > it just sits there keeping yum alive. There's no time out in the ftp > > code, and no timeout in yum waiting for the ftp. My solution is to > > release a new default yumconf in the next few weeks with all http repos, > > because, I'm told, the http code gets 'more luvin'. > > *shrug* > > Hehe. While I doubt very much that's a real quote, I'm pretty sure > I'm the one who said it :) That's true. Frankly, I don't think > yum/urlgrabber is the place to fix such quirky ftp behavior, but > rather in ftplib (which is part of the standard python distro). > > However, this is a significant problem. If folks can provide me with > a way to recreate such problems, I'd be happy to seriously look into > them. Also, each of these messages leads me to think we should bump > timeouts up on the priority list a bit. > > This may not be something timeouts can help though. How long will it > hang? A few minutes? Hours? If the latter, it's probably broken ftp > handling (possibly server, more likely client, conceivably both). In > that case, timeouts won't help. In my case, my network is connected via a PPP dialup connection. As long as the pppd is running, my system doesn't receive ICMP messages about the lack of a connection (pppd queues packets until a connection is made). Whenever I reconnect, my ISP gives me a new IP address. Whenever the dialup connection drops, yum transfers end up hanging, sometimes for hours until I interrupt them. This is why I added the wget option to my copy of yum. Wget works around the problems I have with downloading. -Paul
