FATAL: command execution failed
hudson.util.IOException2: Failed to join the process
	at hudson.Proc$RemoteProc.join(Proc.java:311)
	at hudson.Launcher$ProcStarter.join(Launcher.java:275)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:83)
	at hudson.tasks.CommandInterpreter.perform(CommandInterpreter.java:58)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:19)
	at hudson.model.AbstractBuild$AbstractRunner.perform(AbstractBuild.java:583)
	at hudson.model.Build$RunnerImpl.build(Build.java:165)
	at hudson.model.Build$RunnerImpl.doRun(Build.java:133)
	at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:417)
	at hudson.model.Run.run(Run.java:1179)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
	at hudson.model.ResourceController.execute(ResourceController.java:88)
	at hudson.model.Executor.run(Executor.java:122)
Caused by: java.util.concurrent.ExecutionException: java.lang.NoClassDefFoundError: hudson.remoting.ProxyOutputStream$Flush
	at hudson.remoting.Channel$1.adapt(Channel.java:580)
	at hudson.remoting.Channel$1.adapt(Channel.java:575)
	at hudson.remoting.FutureAdapter.get(FutureAdapter.java:55)
	at hudson.Proc$RemoteProc.join(Proc.java:303)
	... 12 more
Caused by: java.lang.NoClassDefFoundError: hudson.remoting.ProxyOutputStream$Flush
	at java.lang.J9VMInternals.verifyImpl(Native Method)
	at java.lang.J9VMInternals.verify(J9VMInternals.java:72)
	at java.lang.J9VMInternals.initialize(J9VMInternals.java:134)
	at hudson.remoting.RemoteOutputStream.readObject(RemoteOutputStream.java:90)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:48)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:37)
	at java.lang.reflect.Method.invoke(Method.java:600)
	at java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.java:986)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1865)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1345)
	at java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.java:1963)
	at java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:1887)
	at java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.java:1769)
	at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1345)
	at java.io.ObjectInputStream.readObject(ObjectInputStream.java:364)
	at hudson.remoting.UserRequest.deserialize(UserRequest.java:168)
	at hudson.remoting.UserRequest.perform(UserRequest.java:88)
	at hudson.remoting.UserRequest.perform(UserRequest.java:48)
	at hudson.remoting.Request$2.run(Request.java:270)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:453)
	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:315)
	at java.util.concurrent.FutureTask.run(FutureTask.java:150)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
	at java.lang.Thread.run(Thread.java:736)
Caused by: java.lang.ClassNotFoundException: hudson.remoting.ProxyOutputStream$Flush
	at java.net.URLClassLoader.findClass(URLClassLoader.java:421)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:643)
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:346)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:609)
	... 27 more
Notifying upstream projects of job completion