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  1. Jenkins
  2. JENKINS-26379

Jenkins - ssh connection exception

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    Description

      I am trying to configure a slave for my jenkins Master but getting following exception:

      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)
      [01/07/15 16:51:10] Launch failed - cleaning up connection
      [01/07/15 16:51:10] [SSH] Connection closed.
      Any idea of what's the issue here?

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        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. JENKINS-31549 sshcredentials via trilead-ssh2 Cannot Connect to Servers Requiring Strong MACs

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Resolved

          Improvement - An improvement or enhancement to an existing feature or task. JENKINS-33021 trilead ssh MAC and key exchange algorithms severely outdated

          • Critical - Crashes, loss of data, severe memory leak.
          • Resolved

          Activity

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            View 37 older comments
            mc1arke Michael Clarke added a comment -

            I've currently got Pull Requests raised for adding newer MAC, KEX and Key Algorithms into Trilead. These will add support for:

            Key Exchange (KEX):

            MAC:

            Key Algorithms:

            I've not done anything on implementation specific variants (e.g. anything ending in @openssh.com or similar) that have been mentioned in any of the above comments

             

            mc1arke Michael Clarke added a comment - I've currently got Pull Requests raised for adding newer MAC, KEX and Key Algorithms into Trilead. These will add support for: Key Exchange (KEX): diffie-hellman-group-exchange-sha256 MAC: hmac-sha2-512 hmac-sha2-256 Key Algorithms: ecdsa-sha2-nistp256 ecdsa-sha2-nistp384 ecdsa-sha2-nistp521 Ec25519 I've not done anything on implementation specific variants (e.g. anything ending in @openssh.com or similar) that have been mentioned in any of the above comments  
            paladox paladox added a comment -

            Those pulls were merged a new release of trilead-ssh2 has been done. Jenkins will be updated shortly to use the new release.

            paladox paladox added a comment - Those pulls were merged a new release of trilead-ssh2 has been done. Jenkins will be updated shortly to use the new release.
            scm_issue_link SCM/JIRA link daemon added a comment -

            Code changed in jenkins
            User: Michael Clarke
            Path:
            core/pom.xml
            http://jenkins-ci.org/commit/jenkins/b17d0763709be35d39f16d6af7afaf765ac6cf92
            Log:
            Bump Trilead version to receive a number of security enhancements
            JENKINS-41606JENKINS-33021JENKINS-26379JENKINS-31549

            scm_issue_link SCM/JIRA link daemon added a comment - Code changed in jenkins User: Michael Clarke Path: core/pom.xml http://jenkins-ci.org/commit/jenkins/b17d0763709be35d39f16d6af7afaf765ac6cf92 Log: Bump Trilead version to receive a number of security enhancements JENKINS-41606 JENKINS-33021 JENKINS-26379 JENKINS-31549
            oleg_nenashev Oleg Nenashev added a comment -

            The fix has been integrated towards 2.58. It is not a backporting candidate

            oleg_nenashev Oleg Nenashev added a comment - The fix has been integrated towards 2.58. It is not a backporting candidate
            aheritier Arnaud Héritier added a comment -

            thanks a lot mc1arke !!!

            aheritier Arnaud Héritier added a comment - thanks a lot mc1arke !!!

            People

              mc1arke Michael Clarke
              magneto09 Mohit Sharma
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                Created:
                Updated:
                Resolved: