Unable to start SLAVE node in Jenkins

jenkins jenkins-slave
bugCracker picture bugCracker · Dec 1, 2014 · Viewed 7.3k times · Source

Unable to start SLAVE node in Jenkins.

Master machine showing error exception in log file.

[12/01/14 16:21:44] [SSH] Opening SSH connection to 

10.0.11.120:22.
Connection refused: connect
ERROR: Unexpected error in launching a slave. This is probably a bug in Jenkins.
java.lang.IllegalStateException: Connection is not established!
    at com.trilead.ssh2.Connection.getRemainingAuthMethods(Connection.java:1030)
    at com.cloudbees.jenkins.plugins.sshcredentials.impl.TrileadSSHPasswordAuthenticator.canAuthenticate(TrileadSSHPasswordAuthenticator.java:82)
    at com.cloudbees.jenkins.plugins.sshcredentials.SSHAuthenticator.newInstance(SSHAuthenticator.java:207)
    at com.cloudbees.jenkins.plugins.sshcredentials.SSHAuthenticator.newInstance(SSHAuthenticator.java:169)
    at hudson.plugins.sshslaves.SSHLauncher.openConnection(SSHLauncher.java:1173)
    at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:701)
    at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:696)
    at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
[12/01/14 16:21:45] Launch failed - cleaning up connection
[12/01/14 16:21:45] [SSH] Connection closed.

[12/01/14 16:23:44] [SSH] Opening SSH connection to 10.0.11.120:22.

Answer

Deepak picture Deepak · Dec 2, 2014

If your slave machine is Mac then Go to System Preferences -> Sharing and enable Remote Login then try again.

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