java.util.concurrent.ExecutionException: java.io.IOException: Agent failed to connect, even though the launcher didn't report it. See the log output for details.
	at java.base/java.util.concurrent.FutureTask.report(FutureTask.java:122)
	at java.base/java.util.concurrent.FutureTask.get(FutureTask.java:191)
	at hudson.node_monitors.ResponseTimeMonitorTest.skipOfflineAgent(ResponseTimeMonitorTest.java:51)
	at java.base/java.lang.reflect.Method.invoke(Method.java:569)
	at org.jvnet.hudson.test.JenkinsRule$1.evaluate(JenkinsRule.java:659)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.lang.Thread.run(Thread.java:840)
Caused by: java.io.IOException: Agent failed to connect, even though the launcher didn't report it. See the log output for details.
	at hudson.slaves.SlaveComputer.lambda$_connect$0(SlaveComputer.java:325)
	at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
	at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:80)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	... 1 more

0.114 [id=90]	INFO	o.jvnet.hudson.test.JenkinsRule#createWebServer2: Running on http://localhost:36199/jenkins/
   0.122 [id=90]	INFO	jenkins.model.Jenkins#<init>: Starting version 2.499-rc36143.33da_9946b_b_97
   0.174 [id=103]	INFO	jenkins.InitReactorRunner$1#onAttained: Started initialization
   0.175 [id=103]	INFO	jenkins.InitReactorRunner$1#onAttained: Listed all plugins
   0.178 [id=103]	INFO	j.b.api.BouncyCastlePlugin#start: /home/jenkins/agent/workspace/Core_jenkins_PR-10323/test/target/j h16827410900192517462/plugins/bouncycastle-api/WEB-INF/optional-lib not found; for non RealJenkinsRule this is fine and can be ignored.
   0.391 [id=104]	INFO	jenkins.InitReactorRunner$1#onAttained: Prepared all plugins
   0.394 [id=109]	INFO	jenkins.InitReactorRunner$1#onAttained: Started all plugins
   0.395 [id=105]	INFO	jenkins.InitReactorRunner$1#onAttained: Augmented all extensions
   0.817 [id=107]	INFO	jenkins.InitReactorRunner$1#onAttained: System config loaded
   0.818 [id=107]	INFO	jenkins.InitReactorRunner$1#onAttained: System config adapted
   0.818 [id=107]	INFO	jenkins.InitReactorRunner$1#onAttained: Loaded all jobs
   0.820 [id=107]	INFO	jenkins.InitReactorRunner$1#onAttained: Configuration for all jobs updated
   0.870 [id=104]	INFO	jenkins.InitReactorRunner$1#onAttained: Completed initialization
   2.199 [id=87]	INFO	o.j.h.test.SimpleCommandLauncher#launch: agent launched for slave0
   2.368 [id=86]	WARNING	o.j.h.test.SimpleCommandLauncher#launch
java.io.EOFException: unexpected stream termination
	at hudson.remoting.ChannelBuilder.negotiate(ChannelBuilder.java:478)
	at hudson.remoting.ChannelBuilder.build(ChannelBuilder.java:422)
	at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:440)
	at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:407)
	at org.jvnet.hudson.test.SimpleCommandLauncher.launch(SimpleCommandLauncher.java:83)
	at hudson.slaves.SlaveComputer.lambda$_connect$0(SlaveComputer.java:297)
	at jenkins.util.ContextResettingExecutorService$2.call(ContextResettingExecutorService.java:46)
	at jenkins.security.ImpersonatingExecutorService$2.call(ImpersonatingExecutorService.java:80)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
	at java.base/java.lang.Thread.run(Thread.java:840)
   2.373 [id=90]	INFO	hudson.lifecycle.Lifecycle#onStatusUpdate: Stopping Jenkins
   2.385 [id=68]	INFO	o.j.h.test.SimpleCommandLauncher#afterDisconnect: killed Process[pid=77132, exitValue=143] with {HUDSON_COOKIE=4f8fa093-b7d1-4839-8cb7-fb292663e918} for slave0
   2.386 [id=86]	INFO	o.j.h.test.SimpleCommandLauncher#afterDisconnect: no process for slave0
   2.386 [id=131]	INFO	o.j.h.test.SimpleCommandLauncher#afterDisconnect: no process for slave0
   2.388 [id=90]	INFO	hudson.lifecycle.Lifecycle#onStatusUpdate: Jenkins stopped
   2.471 [id=90]	INFO	o.j.h.t.TemporaryDirectoryAllocator#dispose: deleting /home/jenkins/agent/workspace/Core_jenkins_PR-10323/test/target/j h16827410900192517462

=== Starting skipOfflineAgent(hudson.node_monitors.ResponseTimeMonitorTest)