Uploaded image for project: 'Jenkins'
  1. Jenkins
  2. JENKINS-44830

NullPointerException when upgrading to ssh-slaves 1.18

    XMLWordPrintable

Details

    • Bug
    • Resolution: Fixed
    • Blocker
    • ssh-slaves-plugin
    • Jenkins 2.46.3, ssh-slaves 1.18

    Description

      Reproduction steps.

      1. Start Jenkins without installing any plugins
      2. Install an older ssh-slaves plugin (e.g. 1.14), this way there is no key verification strategy configuration. You'll need to also install ssh-credentials manually.
      3. Add an SSH-based agent.
      4. Upgrade to ssh-slaves 1.18 and restart the Jenkins instance.
      5. Note the following error in the agent log:
      ERROR: Unexpected error in launching a slave. This is probably a bug in Jenkins.
java.lang.NullPointerException
	at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:789)
	at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:785)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
[06/12/17 19:19:28] Launch failed - cleaning up connection
[06/12/17 19:19:28] [SSH] Connection closed.

      To make sure this was specific to 1.18, I tested the upgrade from 1.14 to 1.17 and did not see a NullPointerException.

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. JENKINS-42959 Failed known_hosts verification for SSH agent

          • Critical - Crashes, loss of data, severe memory leak.
          • Closed
          links to

          Web Link PR 61

          Activity

            People

              jglick Jesse Glick
              rtyler R. Tyler Croy
              Votes:
              0 Vote for this issue
              Watchers:
              5 Start watching this issue

              Dates

                Created:
                Updated:
                Resolved: