Uploaded image for project: 'Jenkins'
  1. Jenkins
  2. JENKINS-58163

ec2 agents fail to connect without explicit remote FS root declaration



    • Bug
    • Status: Resolved (View Workflow)
    • Minor
    • Resolution: Fixed
    • ec2-plugin, remoting
    • None
    • Jenkins 2.182
      ec2-plugin 1.44
      Linux master and agents
      Java 8


      After upgrading ec2 plugin to 1.44 (from 1.43) and Jenkins to 2.182 (from 2.181), EC2 agents failed to connect with an error from agent jar about workDir requiring an argument.
      The ec2 configuration I had did not specify any remote FS root (i.e. workDir). I had to explicitly declare the remote FS root for each ec2 pool I have to make them work again.

      Expected behavior: Empty remote FS root should default to what it used to default to (user home).

      2019-06-24 12:45:51.417+0000 [id=111]   INFO    hudson.plugins.ec2.EC2Cloud#log: Copying remoting.jar to: /tmp
      2019-06-24 12:45:51.683+0000 [id=27]    INFO    o.j.main.modules.sshd.SSHD#start: Started SSHD at port 2222
      2019-06-24 12:45:52.323+0000 [id=111]   INFO    hudson.plugins.ec2.EC2Cloud#log: Launching remoting agent (via SSH client process): ssh -o StrictHostKeyChecking=no -i /tmp/ec2_7971206362067266819.pem root@ -p 22  java -Djava.awt.headless=true -jar /tmp/remoting.jar -workDir
      2019-06-24 12:45:52.998+0000 [id=111]   SEVERE  hudson.slaves.CommandLauncher#launch: Unable to launch the agent for EC2 (Jenkins) - AWS Agent (i-bleblehbleh)
      java.io.EOFException: unexpected stream termination
              at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:415)
              at hudson.remoting.ChannelBuilder.build(ChannelBuilder.java:360)
              at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:431)
              at hudson.slaves.CommandLauncher.launch(CommandLauncher.java:154)
              at hudson.plugins.ec2.ssh.EC2UnixLauncher.launchScript(EC2UnixLauncher.java:252)
              at hudson.plugins.ec2.EC2ComputerLauncher.launch(EC2ComputerLauncher.java:48)
              at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:294)
              at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
              at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:71)
              at java.util.concurrent.FutureTask.run(FutureTask.java:266)
              at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
              at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
              at java.lang.Thread.run(Thread.java:745)

      Note that I attempted the same without ssh client process, and the result was the same.


        Issue Links


            djan Can Yildiz created issue -
            raihaan Raihaan Shouhell made changes -
            Field Original Value New Value
            Assignee FABRIZIO MANFREDI [ thoulen ] Raihaan Shouhell [ raihaan ]
            raihaan Raihaan Shouhell made changes -
            Status Open [ 1 ] In Progress [ 3 ]
            raihaan Raihaan Shouhell made changes -
            Status In Progress [ 3 ] In Review [ 10005 ]
            djan Can Yildiz made changes -
            Resolution Fixed [ 1 ]
            Status In Review [ 10005 ] Fixed but Unreleased [ 10203 ]
            thoulen FABRIZIO MANFREDI made changes -
            Link This issue is blocked by JENKINS-58193 [ JENKINS-58193 ]
            raihaan Raihaan Shouhell made changes -
            Status Fixed but Unreleased [ 10203 ] Resolved [ 5 ]


              raihaan Raihaan Shouhell
              djan Can Yildiz
              1 Vote for this issue
              6 Start watching this issue