java.lang.NoClassDefFoundError: Could not initialize class jenkins.model.Jenkins
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:191)
	at Script1.class$(Script1.groovy)
	at Script1.$get$$class$jenkins$model$Jenkins(Script1.groovy)
	at Script1.run(Script1.groovy:1)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:580)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:618)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:589)
	at hudson.util.RemotingDiagnostics$Script.call(RemotingDiagnostics.java:142)
	at hudson.util.RemotingDiagnostics$Script.call(RemotingDiagnostics.java:114)
	at hudson.remoting.UserRequest.perform(UserRequest.java:121)
	at hudson.remoting.UserRequest.perform(UserRequest.java:49)
	at hudson.remoting.Request$2.run(Request.java:326)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)

Slave.jar version: 2.52
This is a Unix slave
Evacuated stdout
Slave successfully connected and online
Jul 27, 2016 8:36:57 AM jenkins.model.Jenkins <clinit>
SEVERE: Failed to load Jenkins.class
hudson.remoting.RemotingSystemException: java.lang.InterruptedException
	at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:266)
	at com.sun.proxy.$Proxy5.fetch3(Unknown Source)
	at hudson.remoting.RemoteClassLoader.findClass(RemoteClassLoader.java:171)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
	at com.thoughtworks.xstream.XStream.buildMapper(XStream.java:590)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:568)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:496)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:465)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:411)
	at com.thoughtworks.xstream.XStream.<init>(XStream.java:350)
	at hudson.util.XStream2.<init>(XStream2.java:88)
	at jenkins.model.Jenkins.<clinit>(Jenkins.java:4217)
	at java.lang.Class.forName0(Native Method)
	at java.lang.Class.forName(Class.java:191)
	at Script1.class$(Script1.groovy)
	at Script1.$get$$class$jenkins$model$Jenkins(Script1.groovy)
	at Script1.run(Script1.groovy:1)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:580)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:618)
	at groovy.lang.GroovyShell.evaluate(GroovyShell.java:589)
	at hudson.util.RemotingDiagnostics$Script.call(RemotingDiagnostics.java:142)
	at hudson.util.RemotingDiagnostics$Script.call(RemotingDiagnostics.java:114)
	at hudson.remoting.UserRequest.perform(UserRequest.java:121)
	at hudson.remoting.UserRequest.perform(UserRequest.java:49)
	at hudson.remoting.Request$2.run(Request.java:326)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:68)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.InterruptedException
	at java.lang.Object.wait(Native Method)
	at hudson.remoting.Request.call(Request.java:147)
	at hudson.remoting.RemoteInvocationHandler.invoke(RemoteInvocationHandler.java:253)
	... 30 more