[cygwin] Re: OpenSSH 8.9p1-1 Connects successfully but then hangs - Killing ssh-agent resolves the issue

Jim Garrison jhg@jhmg.net
Sun Apr 3 17:15:23 GMT 2022

On 4/3/2022 9:50 AM, Henry S. Thompson wrote:
> Jason Pyeron writes:
>>> -----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
>>>> ...
>>> 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
>> 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.
> There are three distinct groups of possibly relevant threads, to do
> with interactions between ssh-agent and one of
>    ServerTree [no idea what that is]
>    GitHub
>    gnome-keyring-daemon
> Also, if (my own case), I use gpg-agent maskerading as ssh-agent, and
> _it_ has the 100% problem sometimes.
> Of course, none of this is relevant if the OP's problem with ssh is
> not co-occuring with ssh-agent chewing up an entire processor.

The problem has not recurred (yet) so I don't know if ssh-agent was
at 100% CPU.  All I know at this point is that ssh-agent is *definitely*
involved because killing that process restored ssh functionality. I.e.

before killing ssh-agent: ssh connects but no prompt is displayed
after killing ssh-agent: ssh connects and operates normally

Jim Garrison

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