From: Sylvain Viart <sylvain@...>
Date: 2008-10-03T16:39:55+09:00
Subject: Re: exception in thread? in Net::SSH::Multi

Hi Brian,

Thanks a lot for your work, I really appreciate your effort. :-)

Brian Candler a écrit :
> Sylvain Viart wrote:
>   
>> Works, but I still don't know why the exception are not handled in the
>> lib Net::SSH::Multi which may be specific to this lib.
>>     
>
> Show the backtrace! Otherwise, nobody is going to be able to help you.
>   
Sorry for that, I'm not enough backtrace friendly. :-\

----------------------------8<----------------------- t3.rb
require 'rubygems'
require 'net/ssh/multi'

Net::SSH::Multi.start(:on_error => :warn) do |session|
  # define the servers we want to use
  session.use 'root@srv-04'
  session.use 'root@srv-07'
  session.use 'root@srv-08'
  session.use 'root@fail-08.local'

  # execute commands on all servers
  session.exec( "hostname" )


  # run the aggregated event loop
  session.loop
end
----------------------------8<-----------------------


ruby t3.rb
error connecting to root@srv-04: Net::SSH::AuthenticationFailed 
(root@srv-04)
Text will be echoed in the clear. Please install the HighLine or Termios 
libraries to suppress echoed text.
Password: 
/var/lib/gems/1.8/gems/net-ssh-2.0.4/lib/net/ssh/transport/session.rb:65:in 
`initialize': No route to host - connect(2) (Errno::EHOSTUNREACH)
        from 
/var/lib/gems/1.8/gems/net-ssh-multi-1.0.0/lib/net/ssh/multi/session_actions.rb:37:in 
`join'
        from 
/var/lib/gems/1.8/gems/net-ssh-multi-1.0.0/lib/net/ssh/multi/session_actions.rb:37:in 
`sessions'
        from 
/var/lib/gems/1.8/gems/net-ssh-multi-1.0.0/lib/net/ssh/multi/session_actions.rb:37:in 
`each'
        from 
/var/lib/gems/1.8/gems/net-ssh-multi-1.0.0/lib/net/ssh/multi/session_actions.rb:37:in 
`sessions'
        from 
/var/lib/gems/1.8/gems/net-ssh-multi-1.0.0/lib/net/ssh/multi/session_actions.rb:81:in 
`open_channel'
        from 
/var/lib/gems/1.8/gems/net-ssh-multi-1.0.0/lib/net/ssh/multi/session_actions.rb:120:in 
`exec'
        from t3.rb:12
        from 
/var/lib/gems/1.8/gems/net-ssh-multi-1.0.0/lib/net/ssh/multi.rb:62:in 
`start'
        from t3.rb:4

shell returned 1

I think you're right and this kind of exception is not handled by the lib.
I've to reread the lib, but its doc is confusing.

Regards,
Sylvain.