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  1. Jenkins
  2. JENKINS-56885

It is possible to save a Node without host configuration

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    • Icon: Bug Bug
    • Resolution: Fixed
    • Icon: Major Major
    • org.jenkins-ci.main:jenkins-war:2.170
      org.jenkins-ci:crypto-util:1.1
      org.jenkins-ci.modules:sshd:2.6
      org.kohsuke:trilead-putty-extension:1.2
      org.jenkins-ci.modules:ssh-cli-auth:1.5
      org.jenkins-ci.plugins:ssh-slaves:1.29.4
    • ssh-slaves-1.30.0

      If you do not set the host field in the Node configuration it is possible to save it, then when it tries to connect fails with an NPE

      Agent connection log

      ERROR: Unexpected error in launching a agent. This is probably a bug in Jenkins.
      java.lang.NullPointerException
      at com.trilead.ssh2.KnownHosts.hostnameMatches(KnownHosts.java:313)
      at com.trilead.ssh2.KnownHosts.getAllKnownHostEntries(KnownHosts.java:260)
      at com.trilead.ssh2.KnownHosts.recommendHostkeyAlgorithms(KnownHosts.java:504)
      at com.trilead.ssh2.KnownHosts.getPreferredServerHostkeyAlgorithmOrder(KnownHosts.java:282)
      at hudson.plugins.sshslaves.verifiers.KnownHostsFileKeyVerificationStrategy.getPreferredKeyAlgorithms(KnownHostsFileKeyVerificationStrategy.java:92)
      at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:837)
      at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:833)
      at java.util.concurrent.FutureTask.run(FutureTask.java:266)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
      at java.lang.Thread.run(Thread.java:748)
       [04/04/19 15:40:41] Launch failed - cleaning up connection
      

       

      Config.xml

      <?xml version='1.1' encoding='UTF-8'?>
      <slave>
         <name>agentNullHost</name>
         <description>agent description</description>
         <remoteFS>/home/jenkins</remoteFS>
         <numExecutors>1</numExecutors>
         <mode>NORMAL</mode>
         <retentionStrategy class="hudson.slaves.RetentionStrategy$Always"/>
          <launcher class="hudson.plugins.sshslaves.SSHLauncher" plugin="ssh-slaves@1.29.4">
             <port>22</port>
             <credentialsId>my-credentials</credentialsId>
             <launchTimeoutSeconds>210</launchTimeoutSeconds>
             <maxNumRetries>10</maxNumRetries>
             <retryWaitTime>15</retryWaitTime>
             <sshHostKeyVerificationStrategy class="hudson.plugins.sshslaves.verifiers.NonVerifyingKeyVerificationStrategy"/>
             <tcpNoDelay>true</tcpNoDelay>
        </launcher>
        <label>linux</label>
        <nodeProperties/>
      </slave>
      

        1. Screenshot 2019-04-07 at 14.41.02.png
          58 kB
          Ivan Fernandez Calvo
        2. Screenshot 2019-04-07 at 14.41.35.png
          172 kB
          Ivan Fernandez Calvo
        3. Screenshot from 2019-04-05 13-00-24.png
          21 kB
          Hao Maio
        4. Screenshot from 2019-04-08 16-45-27.png
          19 kB
          Hao Maio

            ifernandezcalvo Ivan Fernandez Calvo
            jenbeg Hao Maio
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              Created:
              Updated:
              Resolved: