java.lang.NullPointerException
	at hudson.util.RemotingDiagnostics.executeGroovy(RemotingDiagnostics.java:119)
	at jenkins.model.Jenkins._doScript(Jenkins.java:3386)
	at hudson.model.Computer._doScript(Computer.java:1172)
	at hudson.model.Computer.doScript(Computer.java:1161)
	at sun.reflect.GeneratedMethodAccessor7323.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.kohsuke.stapler.Function$InstanceFunction.invoke(Function.java:298)
	at org.kohsuke.stapler.Function.bindAndInvoke(Function.java:161)
	at org.kohsuke.stapler.Function.bindAndInvokeAndServeResponse(Function.java:96)
	at org.kohsuke.stapler.MetaClass$1.doDispatch(MetaClass.java:120)
	at org.kohsuke.stapler.NameBasedDispatcher.dispatch(NameBasedDispatcher.java:53)
	at org.kohsuke.stapler.Stapler.tryInvoke(Stapler.java:728)
	... 53 more