[04/11/19 09:49:49] Launching agent $ ssh-keygen -R 52.66.103.201 ERROR: Unable to launch the agent for slave-ubuntu Also: java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at java.io.FilterOutputStream.flush(FilterOutputStream.java:140) at hudson.remoting.BinarySafeStream$2.flush(BinarySafeStream.java:305) at java.io.ObjectOutputStream$BlockDataOutputStream.flush(ObjectOutputStream.java:1823) at java.io.ObjectOutputStream.flush(ObjectOutputStream.java:719) at hudson.remoting.Capability$1.close(Capability.java:132) at hudson.remoting.Capability.writePreamble(Capability.java:144) java.io.IOException: Stream closed at java.lang.ProcessBuilder$NullOutputStream.write(ProcessBuilder.java:433) at java.io.OutputStream.write(OutputStream.java:116) at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82) at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140) at java.io.FilterOutputStream.flush(FilterOutputStream.java:140) at hudson.remoting.BinarySafeStream$2.flush(BinarySafeStream.java:305) at java.io.ObjectOutputStream$BlockDataOutputStream.flush(ObjectOutputStream.java:1823) at java.io.ObjectOutputStream.flush(ObjectOutputStream.java:719) at hudson.remoting.Capability.writePreamble(Capability.java:143) at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:394) 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.slaves.SlaveComputer$1.call(SlaveComputer.java:294) at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46) at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:71) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) ERROR: Process terminated with exit code 255 mkstemp: Permission denied