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  1. Jenkins
  2. JENKINS-46724

[JDK9] Illegal reflective access from remoting

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      While exploring Jenkins 2.60.3 on Oracle Java 9 build 181 (pre-release), it reports illegal access exceptions and warns that a future release of Java 9 will forbid illegal access.

      A stack trace shows:

      WARNING: Illegal reflective access by hudson.remoting.RemoteClassLoader (file:/var/jenkins_home/war/WEB-INF/lib/remoting-3.7.jar) to method java.lang.ClassLoader.getClassLoadingLock(java.lang.String)
        at hudson.remoting.RemoteClassLoader.<clinit>(RemoteClassLoader.java:330)
        at hudson.remoting.MultiClassLoaderSerializer$Output.annotateClass(MultiClassLoaderSerializer.java:69)
        at java.base/java.io.ObjectOutputStream.writeNonProxyDesc(ObjectOutputStream.java:1291)
        at java.base/java.io.ObjectOutputStream.writeClassDesc(ObjectOutputStream.java:1232)
        at java.base/java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1428)
        at java.base/java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1179)
        at java.base/java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:349)
        at hudson.remoting.UserRequest._serialize(UserRequest.java:190)
        at hudson.remoting.UserRequest.serialize(UserRequest.java:199)
        at hudson.remoting.UserRequest.<init>(UserRequest.java:64)
        at hudson.remoting.Channel.call(Channel.java:828)
        at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:517)
        at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:390)
        at hudson.plugins.sshslaves.SSHLauncher.startSlave(SSHLauncher.java:1074)
        at hudson.plugins.sshslaves.SSHLauncher.access$500(SSHLauncher.java:145)
        at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:818)
        at hudson.plugins.sshslaves.SSHLauncher$2.call(SSHLauncher.java:793)
        at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
        at java.base/java.lang.Thread.run(Thread.java:844)

      If it helps you to duplicate the scenario with current Jenkins environment, I have a Dockerfile configured which will run the latest Jenkins Long Term Support release.

      To duplicate the problem:

      1. Clone, build, and run the docker instance 
          $ git lfs clone https://github.com/MarkEWaite/docker-lfs JENKINS-46724
  $ cd JENKINS-46724
  $ git lfs fetch origin origin/lts-jdk9-with-plugins
  $ git checkout -b lts-jdk9-with-plugins -t origin/lts-jdk9-with-plugins
  $ docker build -t  lts-jdk9-with-plugins:latest .
  $ docker run -i --rm --publish 8080:8080 lts-jdk9-with-plugins:latest

            oleg_nenashev Oleg Nenashev
            markewaite Mark Waite
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              Created:
              Updated:
              Resolved: