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java.lang.NullPointerException: 	at org.jenkinsci.main.modules.instance_identity.InstanceIdentity.getPublic(InstanceIdentity.java:81)	at org.jenkinsci.modules.launchd_slave_installer.ComputerListenerImpl.onOnline(ComputerListenerImpl.java:27)	at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:396)	at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:317)	at hudson.plugins.sshslaves.SSHLauncher.startSlave(SSHLauncher.java:454)	at hudson.plugins.sshslaves.SSHLauncher.launch(SSHLauncher.java:293)	at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:200)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)	at java.util.concurrent.FutureTask.run(FutureTask.java:166)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)	at java.lang.Thread.run(Thread.java:679)