Unable to Start NEW SSH slave

[Walter Kacynski]

I'm trying to attache a new SSH based slave to my Jenkins 1.510 installation.  However after creating the slave the master always complains that "This node is offline because Jenkins failed to launch the slave agent on it."  However, clicking on the Slave log reveals NO output text.  I have checked the remote system and there are no access attempts so it looks like the master is not generating any connections.

I see these messages repeated in the master jenkins.err.log:
50568 Jun 17, 2013 9:00:57 AM hudson.slaves.SlaveComputer tryReconnect
50569 INFO: Attempting to reconnect SNDWASA001

[Richard Bywater]

Can you connect via ssh from your master server to the SNDWASA001 machine manually? 

Sounds to me like that perhaps the master server can't do a Dns lookup on the slaves name or there's a firewall in play here (either hardware or software)

HTH

Richard

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[Walter Kacynski]

Yes, I can confirm that SSH functions correctly from the Master to the target computer successfully.  Does anyone know how to enable additional logging or debugging functionality for this process?

-Walt

[Krishna Kumar Tiwari]

I am also not able to launch my slave agent. I also created another Jenkins master , but the same problem persists ! Does anyone have ever faced this situation or how to work with firewall here ?