無法連接到ssh

/var/lib/jenkins/.ssh/known_hosts?[SSH]?No?Known?Hosts?file?was?found?at?/var/lib/jenkins/.ssh/known_hosts.?Please?ensure?one?is?created?at?this?path?and?that?Jenkins?can?read?it.
Key?exchange?was?not?finished,?connection?is?closed.
SSH?Connection?failed?with?IOException:?"Key?exchange?was?not?finished,?connection?is?closed.",?retrying?in?15?seconds.?There?are?9?more?retries?left./var/lib/jenkins/.ssh/known_hosts?[SSH]?No?Known?Hosts?file?was?found?at?/var/lib/jenkins/.ssh/known_hosts.?Please?ensure?one?is?created?at?this?path?and?that?Jenkins?can?read?it.