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Date: Thu, 24 Mar 2005 09:53:30 -0800
From: David Rothenberger <daveroth AT acm DOT org>
Subject: Re: ssh-agent people (and others) please try latest snapshot
In-reply-to: <20050324141137.GB2820@cygbert.vinschen.de>
To: cygwin AT cygwin DOT com
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References: <20050323181923 DOT GA9283 AT trixie DOT casa DOT cgf DOT cx> <200503232358 DOT j2NNwuMP021542 AT mx1 DOT redhat DOT com> <20050324141137 DOT GB2820 AT cygbert DOT vinschen DOT de>
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On 3/24/2005 6:11 AM, Corinna Vinschen wrote:
> On Mar 23 15:55, David Rothenberger wrote:
> 
>>This snapshot is not working as well as the 20050322 snapshot for me. I 
>>start ssh-agent, add a key to it, and then run
>>
>>  while true; do date; ssh-add -l; done
>>
>>in four rxvt windows simultaneously. With the previous snapshot this 
>>worked fine. With this snapshot, the loops occasionally all hang up for 
>>a while and then several windows print
>>
>>  Error writing to authentication socket.
>>  Error writing to authentication socket.
>>  The agent has no identities.
> 
> 
> I could reproduce it and apparently the secret event handling isn't quite
> as safe under load as expected.  I reworked the whole secret handhake so
> that a AF_LOCAL/SOCK_STREAM session now always starts with a handshake on
> the socket itself, which exchanges the connect secret and the credentials
> and closes the connection if anything happens.  I've tested this solution
> under heavy load and it only breaks for me now, if the number of sockets
> in the TIME_WAIT state disallows any further connection to the running
> ssh-agent.  In this case you'll get a message:
> 
>   Could not open a connection to your authentication agent.
> 
> This is not a Cygwin problem or only in so far as Cygwin uses AF_INET
> sockets to implement AF_LOCAL sockets.  On my XP Pro system there's an
> upper bound of about 2000 connections in TIME_WAIT, when the above
> message shows up for the first time.
> 
> Please test the next Cygwin snapshot again.

The latest snapshot is working well for me. Thanks!

-- 
David Rothenberger                spammer? -> spam AT daveroth DOT dyndns DOT org
GPG/PGP: 0x7F67E734, C233 365A 25EF 2C5F C8E1 43DF B44F BA26 7F67 E734


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