import jenkins.security.MasterToSlaveCallable;
//import hudson.remoting.Callable;

def executeJavaCodeOnNode() {

    def node = Jenkins.getInstance().slaves.find({it.name == env.NODE_NAME})
    def hostChannel = node.getComputer().getChannel()
    def task = new MasterToSlaveCallable<String, IOException>() {
            public String call() throws IOException {
                return new String("-on the node-");
            }
    };
        
    hostChannel.call(task);
}

// Main
node ('linux-01') {
    executeJavaCodeOnNode()
}

java.lang.IllegalArgumentException: Unable to locate class file for class WorkflowScript$1
	at hudson.remoting.Which.classFileUrl(Which.java:65)
	at hudson.remoting.RemoteClassLoader$ClassLoaderProxy.fetch4(RemoteClassLoader.java:860)
	at hudson.remoting.RemoteClassLoader$ClassLoaderProxy.fetch3(RemoteClassLoader.java:889)
	at sun.reflect.GeneratedMethodAccessor753.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at hudson.remoting.RemoteInvocationHandler$RPCRequest.perform(RemoteInvocationHandler.java:929)
	at hudson.remoting.Request$2.run(Request.java:369)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
	at org.jenkinsci.remoting.CallableDecorator.call(CallableDecorator.java:19)
	at hudson.remoting.CallableDecoratorList$1.call(CallableDecoratorList.java:21)
	at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
	at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:71)

Also:   hudson.remoting.Channel$CallSiteStackTrace: Remote call to channel
		at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1743)
		at hudson.remoting.Request.call(Request.java:202)
		at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:286)
		at com.sun.proxy.$Proxy5.fetch3(Unknown Source)
		at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:209)
		at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
		at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
		at java.lang.Class.forName0(Native Method)
		at java.lang.Class.forName(Class.java:348)
		at hudson.remoting.MultiClassLoaderSerializer$Input.resolveClass(MultiClassLoaderSerializer.java:134)
		at java.io.ObjectInputStream.readNonProxyDesc(ObjectInputStream.java:1868)
		at java.io.ObjectInputStream.readClassDesc(ObjectInputStream.java:1751)
		at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:2042)
		at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1573)
		at java.io.ObjectInputStream.readObject(ObjectInputStream.java:431)
		at hudson.remoting.UserRequest.deserialize(UserRequest.java:291)
		at hudson.remoting.UserRequest.perform(UserRequest.java:190)
		at hudson.remoting.UserRequest.perform(UserRequest.java:54)
		at hudson.remoting.Request$2.run(Request.java:369)
		at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
....
....
....
Caused: java.lang.Error: Failed to deserialize the Callable object.
	at hudson.remoting.UserRequest.perform(UserRequest.java:196)
	at hudson.remoting.UserRequest.perform(UserRequest.java:54)
	at hudson.remoting.Request$2.run(Request.java:369)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)