I realize this is a really old thread, but I'm having the same problem now with the latest version of screen (4.0.3-5) and cygwin (uname -srv = CYGWIN_NT-5.1 1.7.2(0.225/5/3) 2010-03-24 21:12), and this is the first google result, so I wanna post this somewhere that people will find it.
screen -DRR didn't work for me. Neither did turning on the nonblock screen option, which I saw in another forum. I don't have a solution to the problem, but a work-around. After closing SSH, open screen sessions lock up, 'screen -wipe' locks up, and 'screen -xRR' locks up. If you send a SIGHUP to all of the screen processes, it'll detach every screen session, but the screen server will still be running, and will allow you to reattach now. So, I have a bash script that I run when this happens like this: ------------------------- #!/bin/sh # Send SIGHUP to each screen to force it to let go and let the server recover ps -as | grep screen | cut -c4-7 | xargs kill -1 # Reattach screen -xRR ------------------------- -Isaiah Derek Schrock wrote: > > alias sshhs='ssh -t domain.com '\''screen -DRR session || screen -S > session bash '\''' > > -DRR seemed to fix the problem > I don't like using -DRR because I don't really know what it means "Do > whatever it takes." Is it creating some kinda memory leak that -Dr > wasn't? > We'll see how long DRR works > > On Thu, Aug 21, 2008 at 4:11 PM, Andrew Schulman > <schulman.and...@epamail.epa.gov> wrote: >>> Is there a known problem with Cygwin's SSH and trying to reattach to >>> screen sessions? This seems to be a random occurrence but while >>> trying to reattach to a screen session screen will hang indefinitely. >>> I'm using ssh on a Mac OS X 10.5.4 system to ssh into a Windows 2003 >>> Cygwin installation. Using a bash alias ( alias sshhs='ssh -t >>> domain.com '\''screen -xDr session || screen -S session bash '\''' ) >>> to connect and try to reattach to a session named session and if that >>> fails create a new screen session called session. I've seen this hang >>> occur from accedently closing a Terminal window to telling ssh to >>> close connection ( etner ~ . ). It is not a timed based problem >>> because I've let sessions sit for days that I could reattach to and >>> sessions that were disconnected for a second that would hang. Also >>> something to take note, options like -list or -wipe will also hang >>> screen. So for instance if screen is hanging I can ssh in normally >>> and try to do screen -list or screen -wipe and that screen will hang. >>> The solution to the problem currently is to ssh or Remote Desktop into >>> the machine and kill the hanging screen PID. Is there something >>> fundmently wrong that I'm doing with ssh or screen that's causing this >>> in Cygwin? Thanks. >> >> Hi Derek. I haven't heard of this particular problem before, where the >> reattach >> hangs. In the past screen had frequent problems reattaching in Cygwin, >> but in >> all the cases I'm aware of the session was unreachable, i.e. it was >> listed but >> the socket was dead so screen wouldn't let you reattach at all. >> >> The reattachment problems are mostly solved in the current version of >> screen in >> Cygwin AFAIK. I use it every day and I have only occasional problems >> reattaching-- not frequent and nothing I've ever been able to pin down. >> However, >> I'm using a console window, not logging in via ssh. Not sure how much >> difference that makes. >> >> Last year IIRC, one person reported that he couldn't reattach, and he was >> also >> using ssh. In his case, I believe that at least part of the problem had >> to do >> with bad permissions on the socket files, in /tmp/uscreens. >> >> HTH, >> Andrew. >> >> >> -- >> Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple >> Problem reports: http://cygwin.com/problems.html >> Documentation: http://cygwin.com/docs.html >> FAQ: http://cygwin.com/faq/ >> >> > > > > -- > Derek Schrock > > -- > Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple > Problem reports: http://cygwin.com/problems.html > Documentation: http://cygwin.com/docs.html > FAQ: http://cygwin.com/faq/ > > > -- View this message in context: http://old.nabble.com/SSH-and-reattaching-screen-tp19071658p28075375.html Sent from the Cygwin list mailing list archive at Nabble.com. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple
