<===[JENKINS REMOTING CAPACITY]===>channel started<===[JENKINS REMOTING CAPACITY]===>channel startedRemoting version: 3.17This is a Unix agentEvacuated stdoutAgent successfully connected and onlineMar 14, 2019 10:04:16 AM hudson.remoting.SynchronousCommandTransport$ReaderThread runSEVERE: Unable to read a command (channel channel)java.lang.ClassNotFoundException: hudson.remoting.ProxyOutputStream$Ack at java.net.URLClassLoader.findClass(URLClassLoader.java:381) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at java.lang.Class.forName0(Native Method) at java.lang.Class.forName(Class.java:348) at java.io.ObjectInputStream.resolveClass(ObjectInputStream.java:677) at hudson.remoting.ObjectInputStreamEx.resolveClass(ObjectInputStreamEx.java:59) at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1819) at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1713) at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1986) at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1535) at java.io.ObjectInputStream.readObject(ObjectInputStream.java:422) at hudson.remoting.Command.readFrom(Command.java:116) at hudson.remoting.AbstractSynchronousByteArrayCommandTransport.read(AbstractSynchronousByteArrayCommandTransport.java:35) at hudson.remoting.SynchronousCommandTransport$ReaderThread.run(SynchronousCommandTransport.java:63)