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  1. Jenkins
  2. JENKINS-63921

Null pointer exception launching slave, after changing cloud name.

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    • Icon: Bug Bug
    • Resolution: Unresolved
    • Icon: Minor Minor
    • ec2-plugin
    • None

      I changed the name of my cloud from `dev-ec2` to `ec2` (though JCasC, but I don''t think it matters).

      After this change I got:
      ```
      Oct 13, 2020 9:31:16 AM SEVERE hudson.triggers.SafeTimerTask run

      Timer task hudson.slaves.ComputerRetentionWork@7066e107 failed
      java.lang.NullPointerException
      at hudson.plugins.ec2.EC2Computer.getSlaveTemplate(EC2Computer.java:86)
      at hudson.plugins.ec2.EC2RetentionStrategy.internalCheck(EC2RetentionStrategy.java:130)
      at hudson.plugins.ec2.EC2RetentionStrategy.check(EC2RetentionStrategy.java:107)
      at hudson.plugins.ec2.EC2RetentionStrategy.check(EC2RetentionStrategy.java:52)
      at hudson.slaves.ComputerRetentionWork$1.run(ComputerRetentionWork.java:70)
      at hudson.model.Queue._withLock(Queue.java:1398)
      at hudson.model.Queue.withLock(Queue.java:1275)
      at hudson.slaves.ComputerRetentionWork.doRun(ComputerRetentionWork.java:61)
      at hudson.triggers.SafeTimerTask.run(SafeTimerTask.java:91)
      at jenkins.security.ImpersonatingScheduledExecutorService$1.run(ImpersonatingScheduledExecutorService.java:58)
      at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
      at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308)
      at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180)
      at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294)
      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)
      ```

      When the plugin was tryng to launch new nodes.

      I fixed it by changing the EC2 name back - but it took a long time to find this as the error is when trying to get spot instance. I only did this after finding the source code:
      https://github.com/jenkinsci/ec2-plugin/blob/master/src/main/java/hudson/plugins/ec2/EC2SpotSlave.java#L137
      (and guessing that `getCloud()` (might be returning a null value).

      this might be related to:
      https://issues.jenkins-ci.org/browse/JENKINS-46856
      https://issues.jenkins-ci.org/browse/JENKINS-60258
      They have similar errors, but there were no actionable resolutions in them (for me at least).

            thoulen FABRIZIO MANFREDI
            canuck1987 Tim Brown
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              Created:
              Updated: