"connection closed by remote host" (JRuby / Capistrano) about sshkit

[leehambley]

Can you dry sshkit from master please? I merged a PR

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On Wed, 6 Jan 2021, 11:56 Thibaut Barrère, ***@***.***> wrote: I am experiencing an error when deploying a Capistrano-enabled via JRuby. This used to work. I haven't more information yet, except it may have appeared after a JRuby or a SSHKit/Capistrano upgrade, unsure at this point, but I will comment later if I find the culprit. Versions: - JRuby 9.2.13.0 - SSHKit 1.21.1 - Deploying from Mac OS X 10.14.6 $ bundle exec cap production deploy warning: thread "Ruby-0-Thread-2: /Users/thbar/.rbenv/versions/jruby-9.2.13.0/lib/ruby/gems/shared/gems/sshkit-1.21.1/lib/sshkit/runners/parallel.rb:10" terminated with exception (report_on_exception is true): SSHKit::Runner::ExecuteError: Exception while executing as ***@***.***: connection closed by remote host execute at /Users/thbar/.rbenv/versions/jruby-9.2.13.0/lib/ruby/gems/shared/gems/sshkit-1.21.1/lib/sshkit/runners/parallel.rb:15 (Backtrace restricted to imported tasks) cap aborted! SSHKit::Runner::ExecuteError: Exception while executing as ***@***.***: connection closed by remote host — You are receiving this because you are subscribed to this thread. Reply to this email directly, view it on GitHub <#488>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AAAEUCGTSCQHM4UJZIWCKE3SYQ6VPANCNFSM4VXLZNKQ> .

[thbar]

I just tried (with commit 692a5f4) but the error is still happening:

$ bundle exec cap vagrant deploy
warning: thread "Ruby-0-Thread-2: /Users/thbar/.rbenv/versions/jruby-9.2.13.0/lib/ruby/gems/shared/bundler/gems/sshkit-692a5f4fc190/lib/sshkit/runners/parallel.rb:10" terminated with exception (report_on_exception is true):
SSHKit::Runner::ExecuteError: Exception while executing as [email protected]: connection closed by remote host
  execute at /Users/thbar/.rbenv/versions/jruby-9.2.13.0/lib/ruby/gems/shared/bundler/gems/sshkit-692a5f4fc190/lib/sshkit/runners/parallel.rb:15
(Backtrace restricted to imported tasks)
cap aborted!
SSHKit::Runner::ExecuteError: Exception while executing as [email protected]: connection closed by remote host

[leehambley]

Since you are deploying to vagrant machine locally, one assumes, maybe there's an actual connection problem?

Is "vagrant" using IP addresses or hostnames, are you on a VPN, is your machine definitely up, and already accepting SSH connections?

[thbar]

My obfuscation made things less clear - I actually made 2 different attempts:

• The first one to production, connects via a VPN to a Ubuntu machine, by using its IP, to a machine which was up (I switched to MRI right after, and managed to deploy successfully)
• The second one is to a vagrant VM (VirtualBox), which is accepting SSH connections

I'll make further investigation (including upgrading JRuby just in case), and will share my findings here.

[thbar]

I am also seeing this problem on another use-case apparently (unrelated to capistrano, but using net/sftp to target an even different server). Investigating, will report back.

[thbar]

@leehambley after investigating, it turns out this is not caused by sshkit but instead is a problem due to an upgrade of net/ssh from 5.2.0 to 6.1.0.

It is probably a mis-configuration or other client-specific trouble.

I'll close the current ticket, sorry for the noise & thanks for your replies!