failed to shut down 9238a5bb-cc61-454f-9c1e-aa623d5d9476
Also:   hudson.remoting.Channel$CallSiteStackTrace: Remote call to JNLP4-connect connection from 172.17.40.81/172.17.40.81:52000
		at hudson.remoting.Channel.attachCallSiteStackTrace(Channel.java:1741)
		at hudson.remoting.UserRequest$ExceptionResponse.retrieve(UserRequest.java:357)
		at hudson.remoting.Channel.call(Channel.java:955)
		at hudson.Launcher$RemoteLauncher.kill(Launcher.java:1084)
		at org.jenkinsci.plugins.workflow.support.steps.ExecutorStepExecution$PlaceholderTask$2.run(ExecutorStepExecution.java:625)
		at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
		at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
		at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
		at java.util.concurrent.FutureTask.run(Unknown Source)
		at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
		at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
java.lang.NoClassDefFoundError: Could not initialize class hudson.slaves.SlaveComputer
	at hudson.util.ProcessTree.get(ProcessTree.java:399)
	at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:1096)
	at hudson.Launcher$RemoteLauncher$KillTask.call(Launcher.java:1087)
	at hudson.remoting.UserRequest.perform(UserRequest.java:212)
	at hudson.remoting.UserRequest.perform(UserRequest.java:54)
	at hudson.remoting.Request$2.run(Request.java:369)
	at hudson.remoting.InterceptingExecutorService$1.call(InterceptingExecutorService.java:72)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at hudson.remoting.Engine$1.lambda$newThread$0(Engine.java:93)
Caused: java.io.IOException: Remote call on JNLP4-connect connection from 172.17.40.81/172.17.40.81:52000 failed
	at hudson.remoting.Channel.call(Channel.java:961)
	at hudson.Launcher$RemoteLauncher.kill(Launcher.java:1084)
	at org.jenkinsci.plugins.workflow.support.steps.ExecutorStepExecution$PlaceholderTask$2.run(ExecutorStepExecution.java:625)
	at jenkins.util.ContextResettingExecutorService$1.run(ContextResettingExecutorService.java:28)
	at jenkins.security.ImpersonatingExecutorService$1.run(ImpersonatingExecutorService.java:59)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)