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From: "Jason Pyeron" <jpyeron@pdinc.us>
To: <cygwin@cygwin.com>
References: <3ed89752-9676-a668-f63c-1a9b7662d7b5@jhmg.net>
 <f5b7d892m7j.fsf@ecclerig.inf.ed.ac.uk>
In-Reply-To: <f5b7d892m7j.fsf@ecclerig.inf.ed.ac.uk>
Subject: RE: [cygwin] Re: OpenSSH 8.9p1-1 Connects successfully but then hangs
 - Killing ssh-agent resolves the issue
Date: Sun, 3 Apr 2022 07:47:16 -0400
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> -----Original Message-----
> From: Henry S. Thompson
> Sent: Friday, April 1, 2022 5:21 AM
> 
> Jim Garrison via Cygwin writes:
> 
> > My Cygwin ssh client stopped working... It would successfully connect to
> > the remote (Debian) host but then hang without displaying the command
> > prompt.  See debug output attached, as well as cygcheck output.
> >
> > I decided to run setup to see if there was a newer version of openssh.
> > In preparation for that I always terminate all Cygwin processes because
> > they will interfere with the update.  I killed the ssh-agent process and
> > on a whim decided to try connecting again.  This time it worked.
> >
> > This would seem to indicate something in ssh-agent is interfering with
> > the connection.  There are no credentials loaded into ssh-agent.
> 
> There are reports out there of ssh-agent getting stuck: just out of
> curiousity if this happens again, check to see if ssh-agent is using
> 100% of a CPU.  If so then search for "ssh-agent" "100% CPU" to see
> what the likely culprits are.

I did not find much with that search. I found https://cygwin.com/pipermail/cygwin/2010-January/183237.html but the issue description and resolution was useless.

Do you have certain search results in mind? This happens to me several times a month - on multiple systems. Note this started within the past 3 years.


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