Thanks for explaining Atsuhiko.
It sounds like it's worth trying this option. Although it can't "wake up" a
frozen connection it might prevent the situation to happen in the first
place.
More questions...
Does Jsch also support TCPKeepAlive? I did the "man ssh_config" and ssh
seems to use TCPKeepAlive by default. I'm not sure I completely understand
the difference between the two but after doing some googling it seems that
TCPKeepAlive is mainly used to detect lost peers (and then disconnect and
start all over I guess) while ServerAliveInterval is used to actually keep
the connection alive so that the remote end doesn't assume that we are gone.
Is that correct? If so, it seems I should probably use both TCPKeepAlive
and ServerAliveInterval. How can I enable TCPKeepAlive?
/Bengt
2012/10/3 Atsuhiko Yamanaka <y...@jcraft.com>
> Hi,
>
> +-From: Bengt Rodehav <be...@rodehav.com> --
> |_Date: Wed, 3 Oct 2012 09:31:24 +0200 _____
> |
> ...
> | I will
> try to
> |upgrade the Jsch version but I've also read about
> "setServerAliveInterval".
> |It seems like Camel now supports this property. In addition, there also
> |seems to be a "serverAliveCountMax" property.
>
> Session#setServerAliveInterval() sets a timeout interval in milliseconds
> after which if no data has been received from the server, a message will
> be sent through the encrypted channel to request a response from the
> server.
> OpenSSH has similar configurations, "ServerAliveInterval" and
> "ServerAliveCountMax". Refer to "man ssh_config".
>
> |Can someone explain to me what these properties do? Can they be used to
> |"wake up" an sftp connection that is frozen and thus increase the
> stability
> |of sftp polling?
>
> It will not "wake up" a frozen sftp connection,
> but it will not let a sftp connection sleep.
>
>
> Sincerely,
> --
> Atsuhiko Yamanaka
> JCraft,Inc.
> 1-14-20 HONCHO AOBA-KU,
> SENDAI, MIYAGI 980-0014 Japan.
> Tel +81-22-723-2150
> Skype callto://jcraft/
> Twitter: http://twitter.com/ymnk
> Facebook: http://facebook.com/aymnk
>
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